To see the other types of publications on this topic, follow the link: Agricultural machinery.
Dissertations / Theses on the topic 'Agricultural machinery'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 dissertations / theses for your research on the topic 'Agricultural machinery.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.
1
Glascock, Leslie A. "Increasing the conspicuity of agricultural machinery extremities." Connect to resource, 1995. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1202415272.
Full text
2
Ridgway, Ian Gilbert. "Prototype combine for grain harvesting based on internal pneumatic transfer /." Title page, table of contents and abstract only, 2002. http://web4.library.adelaide.edu.au/theses/09AFM/09afmr5447.pdf.
Full text
3
Foster, Christopher A. "Intelligent control study of drive-by-wire agricultural vehicles." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file 3.19 Mb., 221 p, 2006. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:3221073.
Full text
4
Schäffer, Beat. "Compaction of restored soil by heavy agricultural machinery /." Zürich : ETH, 2007. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=17273.
Full text
5
Lee, Tien-Li. "A heuristic algorithm for agricultural machinery production scheduling." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0003/MQ45334.pdf.
Full text
6
Elbanna, E. B. E. "Agricultural machinery selection : Soil strength and operational timeliness." Thesis, University of Edinburgh, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.371883.
Full text
7
Saadoun, Tahar. "Agricultural machinery selection and scheduling of farm operations." Thesis, University of Edinburgh, 1989. http://hdl.handle.net/1842/27322.
Full textAbstract:
The procedure of calculating annual machinery ownership costs from the discounted cash flows of the mortgaged capital cost, the repair and insurance charges and the resale income is extended to include the effect of loan rate and loan period on interest charges, the effect of capital allowances taking account of the actual balancing charges at the end of the period of ownership, and the effect of tax relief on the interest charges, repair costs and insurance premiums. The concept of marginal holding cost is applied to determine the optimum ownership period. The selection of tractor- plough combinations is based on the prediction of soil characteristics such as moisture content, strength, and workability, all of which influencing the assessment of plough draught and tractor power. A number of filters are used to select the appropriate and realistic tractor /implement combinations with different sizes of fully mounted plough depending on the draught, and the speed of each selected gear of the tractor. For each acceptable combina- tion of tractor and fully mounted plough determined, the costing routine is used to calculate the annual costs. The branch and bound algorithm is suitable for mixed integer solutions to the farm machinery selection problem. Machinery sets are selected simultaneously with the chosen cropping pattern on a given land area. Machinery sets are matched correctly to the tractor sizes. Four sizes of tractor are available (45 kW, 61 kW, 74 kW and 94 kW,. Field operations take place in discrete time periods during which available work days are predicted from soil type and weather records for the specific site. Cereal and root crops are distinguished by optimum sowing and harvesting date. Discrete time periods are defined in relation to these optimal dates and give rise to overlapping operations for different crops. The calculation of probability levels for available work days when operations are subject to different criteria is discussed. A single arbitrary value of 75% probability for available work days is adopted in the linear programming model for the main part of the study. Two stage processes are used to simulate available work days in each time period. The patterns generated converge on the relative frequency pattern laid down by the generating process. The range of experience is wider than that contained in the short series of 24 years historical data. The simulation model generates results suitable for stochastic dominance ranking. In a simulation experiment on a 250 ha arable farm cropping cereals and potatoes, alternative solutions are obtained by integer linear programming, the solutions being ranked according to gross revenue. Annual costs of operating farm machinery are derived from a separate costing algorithm based on the annual hours of use which are determined by the size of the task and not by the sequence of work days. After deducting the annual costs of machinery operation, the cumulative net revenue curves cross and second order stochastic dominance ranking is used to identify the optimum (maximum profit) solution. The current study demonstrates the viability of the analytical procedures but further work is now required to reduce the computing time involved for the complete machinery selection procedure. Meanwhile, a commercial software package is prepared on the calculation of annual machinery ownership costs.
8
Jepsen, Shelly Dee. "Assessment of the U.S. Department of Labor's Tractor and Machinery Certification Program." Columbus, Ohio : Ohio State University, 2006. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1149104900.
Full text
9
Berli, Markus. "Compaction of agricultural subsoils by tracked heavy construction machinery /." Zürich, 2001. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=14132.
Full text
10
Xiong, Huanbao. "Machinery selection and scheduling model for Virginia." Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-07102009-040441/.
Full text
11
Cragg, Brian. "SMEs and global supply chains in the French agricultural machinery sector." Thesis, University of Westminster, 2016. https://westminsterresearch.westminster.ac.uk/item/q0q1y/smes-and-global-supply-chains-in-the-french-agricultural-machinery-sector.
Full textAbstract:
Over the last 40 years globalisation has had a major impact on small and medium sized enterprises (SMEs) in traditional manufacturing sectors, located in developed countries. In response to increasingly competitive domestic markets, many of these firms are now engaged in supplier and customer relationships internationally, in order to expand sales and take advantage of lower sourcing costs. This transition from predominantly local to global connections and the different ways in which SMEs manage their global relationships is the focus of this research. It was decided to confine the study to a single manufacturing sector, so that any differences between firms’ experiences are not driven by the industry, but by other possible factors. Therefore the research question is: how do SMEs in the French agricultural machinery sector manage their global supply chains? Research was carried out into twelve SMEs in the agricultural machinery sector in north-west France. The qualitative research was broken down into three stages: exploratory, which included a range of professionals with knowledge of the sector including SMEs, larger firms and historians; explanatory, which followed a grounded theory methodology to develop new thinking about SMEs and global supply chains based on the findings, which were subsequently fed back to a number of professionals in a final stage and led to further discussion. Uniformity in approaches to managing global supply chains was not found, and differences even between companies in the same product speciality were noted. The challenge of developing business relationships with suppliers and distributors against a background of power asymmetries and cultural distance in the global supply chain was met by the SMEs through the use of a variety of approaches. Out of the research has emerged a conceptualization of the challenges that SMEs face in relation to managing global supply chains: a governance, control and power (GCP) model that highlights the main responses and priorities for SMEs in terms of managing supply chain relationships and controlling flows of materials and information.
12
Prayitno, Shafiq. "Analysis of crop-machinery systems for wetland rice production." Thesis, University of Newcastle Upon Tyne, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.386712.
Full text
13
Cunningham, Stephen. "An economic analysis of investment and depreciation in UK agricultural machinery." Thesis, University of Exeter, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.280688.
Full text
14
Yule, Ian J. "A decision support system for farm machinery budgeting and selection." Thesis, University of Newcastle Upon Tyne, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.242352.
Full text
15
Nagaoka, Alberto Kazushi [UNESP]. "Desenvolvimento e avaliação do desempenho de um equipamento para ensaio dinâmico de rodado agrícola individual." Universidade Estadual Paulista (UNESP), 2001. http://hdl.handle.net/11449/101930.
Full textAbstract:
Made available in DSpace on 2014-06-11T19:31:39Z (GMT). No. of bitstreams: 0
Previous issue date: 2001-02-05Bitstream added on 2014-06-13T20:22:38Z : No. of bitstreams: 1
nagaoka_ak_dr_botfca.pdf: 2279820 bytes, checksum: 149eef5c845342281d3c5d15503e3456 (MD5)O principal objetivo deste trabalho foi desenvolver, instrumentar e avaliar o desempenho de um equipamento para ensaio de pneus agrícolas acoplado a um trator, acionado pela sua tomada de potência, com a finalidade de ensaiar dinâmica e individualmente pneus em condição de campo e avaliar o efeito da passagem do pneu no solo. O equipamento foi desenvolvido no Núcleo de Ensaios de Máquinas e Pneus Agrícolas (NEMPA), pertencente ao Departamento de Engenharia Rural da Faculdade de Ciências Agronômicas da Universidade Estadual Paulista (UNESP), situado no município de Botucatu. Os dados obtidos nas calibrações e nos ensaios foram ajustados pelo método de regressão e os dados do experimento foram analisados considerando-se o delineamento experimental em blocos, no esquema de parcelas subdivididas, tendo nas parcelas os pneus e nas subparcelas as cargas, com cinco repetições. Os valores de índice de cone do solo foram analisados considerando-se o delineamento experimental em blocos, no esquema de parcelas subsubdivididas, e tendo na parcela os pneus, na subparcela as cargas e na subsubparcela as camadas, com cinco repetições. Os resultados do experimento foram interpretados estatisticamente, por meio da análise de variância, adotando-se o nível de significância de 5% e pelo teste de comparação de médias de Tukey. Foram realizados ensaios com variações de velocidades de 0 a 14 km/h, patinagens de 3% a 34%, diâmetros de pneus de 1250 mm a 1722 mm, larguras de pneus de 500 mm a 602 mm e cargas verticais de 5.000 N a 24.000 N. Para estes valores não foram observados danos ao equipamento. O comprimento mais adequado da parcela para os ensaios de campo foi de 20m com freqüência de aquisição de 1Hz. O equipamento permitiu avaliar o desempenho dinâmico de pneus, em condições de solo agrícola, pista asfáltica e comparar diferentes tipos de pneus...
The main objective of this research was to develop, to instrument and to evaluate the performance of a Single Wheel Testing Equipment, linked to a tractor and motioned by the power take off (PTO) with the purpose of dynamically testing individual tires in field and laboratory conditions. The equipment was developed in Agricultural Machinery and Tire Testing Center (NEMPA), Rural Engineering Department of Agronomic Science College, São Paulo State University (UNESP), Botucatu County. The obtained calibration and test data were adjusted using regression method and the experiment data were analyzed considering an experimental design in split plot blocks, with the tire in the parcels and the load tire in the subparcels, with five repetitions. The cone index values were analyzed considering the same experimental design, with the tire in the parcels, the tire load in the subparcels, and the soil layers in the subsubparcels, with five repetitions. The experiment results were statistically interpreted by means of variance analysis, adopting 5% of significance level and using Tukey average test comparison. The tests were realized varying the forward speed from 0 to 14 km/h, the slip from 3% to 34 %, the tire diameter from 1,250 mm to 1,722 mm, the tire width from 500 mm to 602 mm, and the tire loads from 5,000 to 24,000 N. The device worked very well and it was not observed damages or failures for all tested situations. The most adequate parcel length obtained on the field tests was 20 m, using the acquisition frequency of 1 Hz. The equipment permitted to evaluate tire dynamic performance on agricultural field conditions, asphalt track and to compare different tire types as a function of inflation pressure, slip, rolling radius, and tire load. The equipment evaluated individuality the tested tire and have an eletronic date colect system, providing agility and practicity in the tests...(Complete abstract, click electronic access below)
16
Creelman, Glenn. "Investigation of the wear resistance and durability of high speed steel for use in sheep shearing comb construction." Thesis, University of Ballarat, 2001. http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/63639.
Full textAbstract:
"The goal of this thesis was to evaluate high speed steel for use in the construction of sheep shearing combs, to determine if its use can be justified on a performance basis."Master of Applied Science
17
Creelman, Glenn. "Investigation of the wear resistance and durability of high speed steel for use in sheep shearing comb construction." University of Ballarat, 2001. http://archimedes.ballarat.edu.au:8080/vital/access/HandleResolver/1959.17/14611.
Full textAbstract:
"The goal of this thesis was to evaluate high speed steel for use in the construction of sheep shearing combs, to determine if its use can be justified on a performance basis."Master of Applied Science
18
Koyuncu, Atayil. "Acquisition Of Field Data For Agricultural Tractor." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/2/12607237/index.pdf.
Full textAbstract:
During the operations of an agricultural tractor, front axle and front axle support encounter the worst load conditions of the whole tractor. If the design of these components is not verified by systematic engineering approach, the customers could face with sudden failures. Erkunt Agricultural Machinery
Company, which is located in Ankara, has newly designed and manufactured the front axle support of its agricultural tractors. In this study, the design of 2WD (Wheel Drive) Erkunt Bereket Agricultural Tractor’
s front axle support has been verified by developing a verification method, which involves testing the tractor on a special test track and field and together with the computer aided engineering analysis, in order to prevent such failures in the lifetime of the tractor. For this purpose, a strain gage data acquisition system has been designed to measure the strain values on the component, while the tractor is operating on a test track and field. The locations of the strain gages have been determined by simulating the selected design load cases through finite element method. Measuring the maximum strains for the front axle support that have been experienced by the tractor while operating, the stress values have been calculated and the design safety has been investigated considering the material&
#8217
s tensile strength. Secondly, the fatigue life of the component regarding the acquired strain data has been predicted. These processes have led the company to verify the design of the front axle support.
19
Sikorska, Małgorzata, and P. G. Pererva. "Modern state and prospects of development of the industry of agricultural machinery." Thesis, Харківський національний університет будівництва та архітектури, 2017. http://repository.kpi.kharkov.ua/handle/KhPI-Press/31112.
Full textAbstract:
Agricultural engineering must be tailored to the interests and needs of the farmers in full accordance with the plans of agricultural development. In General, the removal of the machine-building complex of the crisis requires the development of a national programmed of development of agricultural mechanical engineering which involves the production of technological complexes of machines and equipment for agriculture, food and processing industry, bringing production of new types of final products and parts to meet the domestic needs by 70%.
20
Bell, Paul Kevin Thomas. "The estimation of economic depreciation for Canadian farm machinery." Thesis, University of British Columbia, 1985. http://hdl.handle.net/2429/24475.
Full textAbstract:
The objective of this thesis was to estimate the rate at which four types of farm machinery lose value in Canada. Specifically, Canadian data on used machinery prices was utilized to produce estimates of economic depreciation for two-wheel-drive tractors, combines, square balers and large round balers.
The data used in this thesis to make these estimates are special for two reasons. First of all, they represent the only extensive record of Canadian used farm equipment prices available. Most previous studies have based their estimates on American data, assuming that they apply equally well to the Canadian situation.
Secondly, these data record actual transactions in the used market and these transactions have been reported in an unaveraged format. This is valuable because information on options, horsepower, condition, and, most importantly, hours of use was retained for each machine. The availability of this information permitted richer and more specific estimates of depreciation. In particular, the inclusion of hours of use in the models enabled a distinction to be made in this thesis between the component of depreciation which is directly attributable to age and that component which is directly attributable to accumulated hours of use. It is felt that this distinction provides a beginning point for the study of depreciation due to simple "wear and tear", and that depreciation which is due to obsolescence and technological change.
As well, this thesis extensively reviewed the literature on depreciation in an effort to determine the best approach to follow. The method finally adopted was the "remaining value approach"; however, the thesis went further than the typical remaining value approach because an attempt was made to estimate the pattern as well as the rate of depreciation. This was done by initially adopting a functional form which was flexible enough to let the data "choose for themselves" between the commonly used depreciation rules of thumb (declining balance, straight-line and one-hoss-shay patterns). This was possible by using the Box-Tidwell procedure. This Box-Tidwell procedure when applied to the extensive tractor data indicated that tractors in Canada follow a declining balance (geometric) pattern of depreciation. This was taken as support for the adoption of semi-log models to estimate depreciation. The main findings of this thesis are, first, that depreciation rates vary among assets (from approximately 9% for tractors to nearly 16% for large round balers), and, secondly, that these rates are less than those allowed by the government for tax purposes. It was concluded that this generosity on the part of the government would be acceptable if it applied equally to all depreciable assets, but the divergence in depreciation rates found in this thesis indicate that generous blanket depreciation charges give more advantage to some than to others.Land and Food Systems, Faculty of
Graduate
21
Locker, Alison R. "Burden of agricultural machinery injuries in Ontario, 1985-1996, descriptive and economic analyses." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp05/MQ63330.pdf.
Full text
22
Gordon, Greg P. (. "Laser position locating system for off-road vehicles /." Connect to resource, 1987. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1200512216.
Full text
23
Tirapicos, António Maria Carvalho. "Avaliação da eficiência de campo em operações agrícolas com recurso à tecnologia GPS." Master's thesis, ISA/UTL, 2012. http://hdl.handle.net/10400.5/5376.
Full textAbstract:
Mestrado em Engenharia Agronómica - Instituto Superior de AgronomiaIn the past, the estimation of field efficiency for agricultural machinery based on measurements of area and time was difficult and time consuming using a stopwatch during operation. Currently with the GPS system one can obtain this information much faster and in a simpler manner. This study tested a methodology for the estimation of the field efficiency of agricultural operations using the GPS. We measured working time of several agricultural operations and subsequently compared with data available in the literature. Since there are few empirical studies conducted on this subject the comparisons were mainly restricted to the data collected from literature; it was found that the majority of the field efficiencies obtained were slightly lower than those reported (mainly in operations involving the application of production factors). Through further and more detailed analysis on data collected by GPS one can identify areas where the operation was less efficient and make improvements in work performance. The analyzed data can help managers improve farm management decisions on machinery use, increasing their operation efficiency.
24
Van, der Linde Jaco. "Discrete element modeling of a vibratory subsoiler." Thesis, Link to the online version, 2007. http://hdl.handle.net/10019/721.
Full text
25
Davis, Garrett W. "Defining and Meeting the Demand For Agricultural Machinery in China: A Case Study of John Deere." DigitalCommons@USU, 2009. https://digitalcommons.usu.edu/etd/277.
Full textAbstract:
There has been little research conducted regarding the agricultural machinery market in China. However, current data suggest that this demand is dramatically increasing. This dissertation endeavors to generally define the current demand of the agricultural machinery market in China. There has been research conducted on multiple factors of the agricultural machinery market in China, such as land tenure rights, rural migration, government agricultural policies, and others. Through the use of limited quantitative data, market demand is analyzed and defined. By means of a qualitative case study of a successful multinational corporation, Deere & Co., how the demand is being met for agricultural machinery in China is also discussed. This case study also contributes to defining market demand for agricultural machinery in China. Through the use of this mixed-method research, key components of the Chinese agricultural machinery market are identified and analyzed. Challenges within this market are discussed, along with how Deere & Co.'s Chinese operations have dealt with these challenges. This corporation's experience in the Chinese market brings benefit to any company seeking to better understand the workings of the agricultural machinery market in China.
26
Nagaoka, Alberto Kazushi. "Desenvolvimento e avaliação do desempenho de um equipamento para ensaio dinâmico de rodado agrícola individual /." Botucatu : [s.n.], 2001. http://hdl.handle.net/11449/101930.
Full textAbstract:
Orientador: Kléber Pereira LançasBanca: Ulisses Rocha Antuniassi
Banca: João Eduardo Guarnetti Santos
Banca: Marcos Milan
Banca: Haroldo Carlos Fernandes
Resumo: O principal objetivo deste trabalho foi desenvolver, instrumentar e avaliar o desempenho de um equipamento para ensaio de pneus agrícolas acoplado a um trator, acionado pela sua tomada de potência, com a finalidade de ensaiar dinâmica e individualmente pneus em condição de campo e avaliar o efeito da passagem do pneu no solo. O equipamento foi desenvolvido no Núcleo de Ensaios de Máquinas e Pneus Agrícolas (NEMPA), pertencente ao Departamento de Engenharia Rural da Faculdade de Ciências Agronômicas da Universidade Estadual Paulista (UNESP), situado no município de Botucatu. Os dados obtidos nas calibrações e nos ensaios foram ajustados pelo método de regressão e os dados do experimento foram analisados considerando-se o delineamento experimental em blocos, no esquema de parcelas subdivididas, tendo nas parcelas os pneus e nas subparcelas as cargas, com cinco repetições. Os valores de índice de cone do solo foram analisados considerando-se o delineamento experimental em blocos, no esquema de parcelas subsubdivididas, e tendo na parcela os pneus, na subparcela as cargas e na subsubparcela as camadas, com cinco repetições. Os resultados do experimento foram interpretados estatisticamente, por meio da análise de variância, adotando-se o nível de significância de 5% e pelo teste de comparação de médias de Tukey. Foram realizados ensaios com variações de velocidades de 0 a 14 km/h, patinagens de 3% a 34%, diâmetros de pneus de 1250 mm a 1722 mm, larguras de pneus de 500 mm a 602 mm e cargas verticais de 5.000 N a 24.000 N. Para estes valores não foram observados danos ao equipamento. O comprimento mais adequado da parcela para os ensaios de campo foi de 20m com freqüência de aquisição de 1Hz. O equipamento permitiu avaliar o desempenho dinâmico de pneus, em condições de solo agrícola, pista asfáltica e comparar diferentes tipos de pneus...(Resumo completo, clicar acesso eletrônico abaixo)
Abstract: The main objective of this research was to develop, to instrument and to evaluate the performance of a Single Wheel Testing Equipment, linked to a tractor and motioned by the power take off (PTO) with the purpose of dynamically testing individual tires in field and laboratory conditions. The equipment was developed in Agricultural Machinery and Tire Testing Center (NEMPA), Rural Engineering Department of Agronomic Science College, São Paulo State University (UNESP), Botucatu County. The obtained calibration and test data were adjusted using regression method and the experiment data were analyzed considering an experimental design in split plot blocks, with the tire in the parcels and the load tire in the subparcels, with five repetitions. The cone index values were analyzed considering the same experimental design, with the tire in the parcels, the tire load in the subparcels, and the soil layers in the subsubparcels, with five repetitions. The experiment results were statistically interpreted by means of variance analysis, adopting 5% of significance level and using Tukey average test comparison. The tests were realized varying the forward speed from 0 to 14 km/h, the slip from 3% to 34 %, the tire diameter from 1,250 mm to 1,722 mm, the tire width from 500 mm to 602 mm, and the tire loads from 5,000 to 24,000 N. The device worked very well and it was not observed damages or failures for all tested situations. The most adequate parcel length obtained on the field tests was 20 m, using the acquisition frequency of 1 Hz. The equipment permitted to evaluate tire dynamic performance on agricultural field conditions, asphalt track and to compare different tire types as a function of inflation pressure, slip, rolling radius, and tire load. The equipment evaluated individuality the tested tire and have an eletronic date colect system, providing agility and practicity in the tests...(Complete abstract, click electronic access below)
Doutor
27
Hussain, Mohd Nasir. "The role and potential contribution of industrial design in developing agricultural machinery for Malaysia." Thesis, Loughborough University, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.289424.
Full text
28
Campbell, Clayton Marshall Fulton John Patrick Zech Wesley C. "Evaluating spinner-disc technology for the distribution of poultry litter." Auburn, Ala, 2009. http://hdl.handle.net/10415/1581.
Full text
29
Awang, Dzulkifli. "Potential contribution of industrial design to the adaptation of agricultural machinery for use in Malaysia." Thesis, Manchester Metropolitan University, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.240741.
Full textAbstract:
This thesis describes a study of the potential contribution of industrial design to the adaptation of agricultural machinery for use in Malaysia. The study identifies the nature of agricultural machinery and equipment design which uses mainly adaptation concepts as a means of getting a 'quick' design. The nature of industrial design with regard to agricultural machinery and equipment design in Malaysia and the UK was also studied. This research has established the potential of industrial designers to contribute in this area of design activity. This researchu tilised a combinedm ethodologyo f'triangulation' where quantitative surveysa nd qualitative studies were used. Literature surveys, a groundwork study, questionnaire surveys, case studies, interviews, and observations were carried out. Case studies and interviews were the main methods of data collection while questionnaire surveys helped to provide information, support, and validate findings from the former methods. Case studies and interviews involved five establishmentsin Malaysia and four companiesi n the UK. Adaptation designw as confirmed as'a successfulc oncept, however, the processesin volved in the designo f machinesa nd equipmentn eedt o be developeda nd improved. There were generally no specific design processes or procedures adhered to while carrying adaptation design work. They were determinedb y the samef actors i. e. the types of projects, aims/objectiveso f project, duration and date-line, funding and level of adaptation design. From the quantitative survey and qualitatives tudyr esults,i t was establishedth at industrial design should be incorporated into the adaptation design concept. The role of industrial designers in adaptation design can be that of assisting and advising the engineers and working collectively as a team. The potential contributionso f industriald esignersw ould be to improve 'appearance('a esthetics),q uality, and overall design. Industrial design knowledge in human-factors- ergonomics/anthropometricswere also sort for in order to satisfy factors such as safety and ease of use. Industrial designers were also needed to achieve designs which could reduce costs and to increase sales of machinery/equipmenpt roducts. The thesis concludes that the diverse nature of agricultural machinery and equipment design, especiallyfo cusingo n the adaptationd esignc oncept,r equiresa synthesisa pproachr equiring the participation and consideration of such factors as: inter-disciplinary relationships, agricultural policy, designp olicy, designe ducation,a nd public awarenessA. ll thesef actors coupled with the contributions made by industrial designers would bring improvements to the success rates of adaptation design. V
30
Jiménez, Zehnder Georgina Noemi. "Industrial districts and innovation systems. the case of agricultural machinery industry in Argentina and Italy." Doctoral thesis, Università Politecnica delle Marche, 2016. http://hdl.handle.net/11566/243069.
Full textAbstract:
L'obiettivo della mia tesi è stato quello di condurre un'analisi congiunta dei distretti industriali e dei sistemi d'innovazione da un punto di vista empirico.
Il mio lavoro è stato impostato su uno studio comparativo di un distretto industriale di macchine agricole in Argentina ed uno in Italia rilevando i loro punti deboli e di forza e contribuendo ad un'analisi comparativa del sistema d'innovazione in un paese sviluppato (Italia) ed in un altro in via di sviluppo (Argentina).
A tal fine ho condotto una disamina dell'industria metalmeccanica e dell'industria mondiale delle macchine agricole confrontando i settori italiani e argentini.
Infine ho considerato, il conglomerato industriale della città di Las Parejas (Santa Fe-Argentina) e della Regione Marche (Italia) osservando come essi siano due distretti industriali in un sistema innovativo influenzati dalla sua storia, dalla sua cultura e dal suo contesto giuridico ed istituzionale, variabili, queste, che attraverso la loro influenza hanno ritardato o spinto lo sviluppo del settore.The purpose of the thesis was to conduct an analysis of industrial districts and innovation systems de manera conjunta desde un punto de vista empírico. I made a comparative study of an industrial district of agricultural machinery in Argentina and one in Italy; noting weaknesses and strengths, thus contributing with a comparative analysis of the innovation system, applied in a developed country (Italy) and another in a developing country (Argentina). For this I conducted a study of the metal-mechanic industry, the global agricultural machinery industry, in contrast with Italian and Argentine sectors. For it I considered, the industrial conglomerate of the city of Las Parejas (Santa Fe-Argentina) and Marche Region (Italy), observing that are two industrial districts in an innovative system, that are influenced by its history, its culture, and its legal and institutional context; variables that through their influence, have delayed or driven the development of the sector.
31
Worley, Stacy K. "Bearing failure detection in farm machinery using low-cost acoustic techniques." Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-06302009-040529/.
Full text
32
Baricelo, Luís Gustavo. "A evolução diferenciada da indústria de máquinas agrícolas: um estudo sobre os casos norte-americano e brasileiro." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/11/11132/tde-03022015-163626/.
Full textAbstract:
Esta dissertação tem como objetivo realizar um estudo da evolução da indústria de máquinas agrícolas em dois mercados diferentes: o mercado norte-americano e o brasileiro. Deseja-se analisar como esta indústria se desenvolveu levando em consideração fatores da estrutura industrial, como também questões relacionadas à política econômica e agrícola. Utilizou-se uma metodologia analítica descritiva, iniciando o trabalho com uma revisão teórica dos fatores industriais e de política agrícola que podem influenciar a indústria e o mercado de máquinas agrícolas. Após tal revisão teórica iniciam-se os estudos das indústrias nos países citados. Primeiramente analisou-se o caso dos Estados Unidos, desde a formação do setor até o atual estágio de desenvolvimento daquele mercado. Os capítulos subsequentes fazem a mesma análise, mas com vistas ao caso brasileiro, dando ênfase na importância que o Estado teve na formação da indústria de máquinas agrícolas e o papel por ele desempenhado para estimular as vendas de tratores e demais máquinas através do crédito agrícola para investimento. Analisou-se a evolução da indústria brasileira desde seu nascimento, seu auge ocorrido durante o período 1960-1980, a crise que enfrentou entre 1980 e 1990, bem como sua posterior recuperação com o início dos anos 2000. As principais conclusões que este trabalho chegou foram que, a evolução desta indústria nos países estudados se deu de forma diferenciada. Enquanto no caso norte-americano o setor se desenvolveu de forma mais autônoma, isto é, sem tanta interferência estatal, no caso brasileiro somente pode-se pensar o desenvolvimento desta indústria levando em consideração a intervenção estatal, tanto por meio de incentivos para a criação da indústria quanto por meio do crédito subsidiado que fomentou as vendas. No caso norte-americano a indústria se desenvolveu através da capacidade inovadora de seus empresários, sem a intervenção direta do governo. Quando esta ocorreu deu-se em termos de políticas agrícolas que, ao sustentar o preço dos produtos agrícolas via política de preços mínimos, induziu os produtores rurais a se tornarem mais produtivos, adotando as novas máquinas existentes. Outra conclusão foi que durante as décadas de 1980-1990 tanto no Brasil quanto nos Estados Unidos o Estado se manteve ausente, tanto em termos setoriais quanto em termos de política agrícola, mesmo período no qual ambos os mercados de máquinas enfrentaram graves crises Tal indústria somente voltaria a se recuperar em 1990, no caso americano, e nos anos 2000 no caso brasileiro. Nos Estados Unidos a recuperação foi acompanhada por uma nova onda de inovações, principalmente com o surgimento da eletrônica embarcada e com a agricultura de precisão. Tal tecnologia chegaria no Brasil por volta dos anos 2000, dando novo ânimo ao setor, juntamente com o novo programa de financiamento lançado pelo governo brasileiro para modernização da frota agrícola, o MODERFROTA, que impulsionou as vendas de máquinas. Em termos mundiais os Estados Unidos consolidaram-se como difusores de progresso técnico e exportadores de máquinas, enquanto o Brasil, ainda que seja um importante produtor entre os países em desenvolvimento, não chega a ultrapassar a marca de 1,1% em relação as exportações mundiais.This paper aims to conduct a study of the evolution of the agricultural machinery industry in two different markets: the North American market and the Brazilian. Examining how this industry developed taking into account factors of industrial structure, as well as issues related to economic and agricultural policy. This paper used a descriptive analytical methodology, starting work with a theoretical review of industrial and agricultural policy factors that can influence the industry and the market of agricultural machinery. After this literature review begins the study of industries in the countries cited. First was analyzed the case of the United States, since the formation of the sector to the current stage of development of that market. Subsequent chapters did the same analysis, but with a view to the Brazilian case, emphasizing the importance that the State had in shaping the agricultural machinery industry and the role it has played to stimulate sales of tractors and other machines through the agricultural investment credit. Analyzing evolution of the Brazilian industry from its birth, its peak occurred during the period 1960-1980, the crisis that faced between 1980 and 1990 and their subsequent recovery with the early 2000s The main conclusions that this study came were that the evolution of this industry in the countries studied occurred differently. While the American case the industry has developed more autonomously, ie, without much government interference in the Brazilian case the development of this industry was influenced by state intervention, both through the creation of incentives for industry as through subsidized credit that boosted sales. In the American case, the industry developed through the innovative capacity of their business, without the direct intervention of the government. When this occurred was given in terms of agricultural policies, to sustain the price of agricultural products via the minimum price policy, induced farmers to become more productive, adopting the new existing machines. Another conclusion was that during the decades of 1980-1990 both in Brazil and in the United States remained absent from the state, both in terms of sectors and in terms of agricultural policy, the same period in which both markets faced serious crises Such machinery industry only back to recover in 1990, in the American case, and in the 2000s in the Brazilian case. In the United States recovery was accompanied by a new wave of innovation, especially with the emergence of embedded electronics and precision agriculture. Such technology would arrive in Brazil around the 2000s, giving new life to the industry, along with the new financing program launched by the Brazilian government to modernize the agricultural fleet, MODERFROTA, which boosted sales of machines. Globally the United States consolidated as diffusers of technical progress and exporters of machinery, while Brazil, even though it is a major producer among developing countries, does not quite surpass the mark of 1.1% over exports world.
33
Pereira, Flávio José de Sousa. "Construção de uma bancada de ensaio e avaliação de um sistema de mensuração da produtividade de grãos." Universidade de São Paulo, 2002. http://www.teses.usp.br/teses/disponiveis/11/11148/tde-31072002-150808/.
Full textAbstract:
Com o avanço da agricultura de precisão, em que a variabilidade da produtividade entre os diversos pontos de uma determinada área é levada em consideração, é necessário aprimorar, cada vez mais, o sistema de coleta de dados, para que os resultados possam ser confiáveis. Dentre outros, faz-se necessário conhecer o desempenho dos sensores localizados nas colhedoras, para que se saiba o nível de acurácia dos dados de campo para a geração dos mapas de produtividade. O objetivo do presente trabalho foi caracterizar o desempenho, sob condições controladas, de um equipamento comercial, especialmente o sensor de fluxo de volume e suas interações com os sensores de inclinação, de velocidade de deslocamento da máquina e de grau de umidade dos grãos, destinados à mensuração da produtividade de culturas de grãos em geral. Foi montada uma bancada de ensaio constituída de um tanque alimentador com comporta de abertura variável, que escoa grãos a um condutor helicoidal, que são transportados para um elevador de taliscas de uma colhedora comercial. Os grãos transportados pelo elevador passam através dossensores de fluxo de volume e grau de umidade e, em seguida, são descarregados num tanque superior suspenso por uma célula de carga com capacidade de 2.000kg (desprezando a variação da gravidade com relação ao nível do mar) para que os dados de massa sejam comparados com os registrados pelo sensor de fluxo de volume. O monitor de produtividade foi ensaiado na bancada para simulações de fluxos constantes e variados em três diferentes posições transversais do elevador. Os resultados mostraram que a bancada de ensaio mostrou-se eficiente para os tipos de ensaios propostos. Sua estrutura é resistente e a variação da angulação do elevador é de fácil manejo. A geometria da construção do tanque de alimentação mostrou-se eficiente para fornecer vazões uniformes com o tempo, obtendo-se taxas de fluxo constantes dentro dos limites de 2,0 a 8,0kg.s-1. O sensor de velocidade apresentou erro médio relativo de 0,31% e o de grau de umidade, erro médio em módulo de 5,01% para as condições estudadas. Quanto mais afastado do fluxo médio de calibração, pior é a estimativa do fluxo pelo monitor de produtividade. O erro médio geral dos ensaios com taxas de fluxo constantes foi de 5,31%, com desvio padrão de 4,14. O monitor propiciou, em 70% dos ensaios, erros pontuais menores que 6% para ensaios com fluxo constante. Suas leituras superestimaram valores menores do que o ponto da taxa de fluxo média de calibração e subestimaram valores para taxas de fluxo maiores que este ponto. As leituras do monitor responderam imediatamente as variações impostas ao fluxo processado pelo elevador de grãos. O clinômetro ou o algoritmo que considera a inclinação é eficiente para compensar as inclinações transversais da máquina, mesmo em condições de taxas de fluxo variadas. O erro médio geral dos ensaios com taxas de fluxo variadas, calculado a partir do erro médio em módulo de cada ensaio foi, 4,84%. O erro médio global encontrado do monitor de produtividade para as leituras com taxas de fluxo constantes e variadas, foi 5,12%.With the progress of the precision agriculture where spatial yield variability is taken into account, it is necessary to improve data collection so the results can be more reliable. It is necessary to understand how yield sensor used on combines works in order to know the accuracy of the field data for generation of the yield maps. This work aims to characterize the performance, under controlled conditions, of a commercial equipment, its yield sensor and interactions with the hillside sensor, forward speed sensor and grain moisture sensor. A test bench with a tank feeder was built with a variable opening floodgate, which drains grains to the foot of the paddle elevator of a commercial combine. The grain flow transported by the elevator pass through the yield and moisture sensor and is unloaded in a superior tank hold by a load cell with capacity of 2.000kg (desconsidering the variation of the gravity) so that the mass data is compared with that registered by the monitor. The monitor was tested on simulations of constant and variable flow rates in three different transverse positions of the elevator. The results showed that the test bench was shown efficient for the types of proposed tests. Its structure is resistant and the variation of the angle of the elevator is of easy handling. The geometry of the feeding tank was shown efficient to supply uniform flow rates, between 2,0 and 8,0kg.s-1. The speed sensor showed relative mean error of 0,31% and the moisture sensor presented a module mean error of 5,01%. Flow estimation got worst increasing or decreasing the flow rate apart from calibration region. Main mean error of the test with constant flow rates was of -5,31%, with standard deviation of 4,14. On 70% of the test monitor, readings resulted in erros less than 6,00% with constant flow. Its readings overestimated flow values under the mean flow rate of calibration and underestimated flow above it. The readings of the yield monitor responded to the variations imposed to the flow through by the elevator immediately. The hillside sensor and the algorithm that considers the inclination are efficient for compensating the transverse inclinations of the machine, even in conditions of varied flow rates. The general mean error test with varied flow rates, was 4,84%. The global mean error shown by the yield monitor for the readings with varied and constant flow rates was 5,12%.
34
Chisango, Future T. "Agricultural mechanization for sustainable agriculture and food security in Zimbabwe: a case of Bindura District in Mashonaland Central Province." Thesis, University of Fort Hare, 2010. http://hdl.handle.net/10353/348.
Full textAbstract:
A cardinal development goal of the Zimbabwean government is agricultural mechanization through the acquisition and use of tractors by arable crop farmers in communal and resettlement state land. This research project therefore aimed at investigating the impact of mechanization on agricultural productivity focusing on farmers in Bindura district of Zimbabwe who benefitted under the ongoing farm mechanization program. The existing land policy and the issue of technical efficiency in agricultural productivity are assumed to be the drivers of the program. It is likely that these key issues will constitute an important consideration in determining the sustainability of the mechanization policy. A multistage sampling technique was used to randomly select 90 farmers in the study area. The Cobb Douglas approach and Logistic regression were used to analyze data obtained from the respondents. Results revealed that tractor use was positively influenced by household size, access to extension services and crop output equivalent. Education, land area cultivated, stoniness negatively influenced the probability of adoption of mechanized farming. Furthermore, the technical efficiency estimate of adopter and nonadopters of mechanized farming showed no difference in their level of technical efficiency in agricultural productivity that was 64 percent on average. The level of observed inefficiency was increased by slope, stoniness and household size while age reduced technical inefficiency. It is recommended that government should consolidate the present gains arising from extension services. Also, environmental factors such as slope (topography) and stoniness, which constituted major disincentives in communal areas, could be overcome if government and farmers can identify and open up new areas of farmland for occupation by farmers.
35
Colson, Greg. "Alternative approaches for sharing machinery, labor, and other resources among small- and medium-sized agricultural producers." [Ames, Iowa : Iowa State University], 2008.
Find full text
36
Lovarelli, D. "APPLICATION AND ENHANCEMENT OF LIFE CYCLE ASSESSMENT AND WATER FOOTPRINT APPROACHES TO AGRICULTURAL MACHINERY AND CULTIVATION." Doctoral thesis, Università degli Studi di Milano, 2018. http://hdl.handle.net/2434/533776.
Full textAbstract:
La sostenibilità ambientale delle produzioni agricole ha riscosso ampio interesse in tutto il mondo. Per la comunità scientifica, comprendere i sistemi produttivi agricoli nell’ottica dell’impatto ambientale, che consente di realizzare analisi con una prospettiva olistica, e quantificare i benefici ambientali derivanti dalla selezione di una serie di operazioni o un'altra, comporta la possibilità di identificare e suggerire l'introduzione di miglioramenti vantaggiosi per la società e le generazioni future.
Questa Tesi di Dottorato è stata finalizzata a studiare come rendere adeguatamente affidabili gli inventari per le valutazioni di sostenibilità ambientale relativi ai sistemi produttivi agricoli in cui si utilizzano macchine agricole per le operazioni di campo. Per esse, le caratteristiche locali pedo-climatiche e organizzativo-produttive influenzano considerevolmente i dati di inventario e, di conseguenza, i risultati degli studi di sostenibilità ambientale, qui realizzati secondo la metodologia del Life Cycle Assessment (LCA). Nel dettaglio, utilizzando l’LCA, nella Tesi sono stati quantificati gli impatti ambientali delle operazioni agricole di campo per la preparazione del letto di semina (lavorazione del terreno primaria e secondaria) e per la distribuzione di fertilizzanti organici; ciò è stato fatto studiando l'uso di diverse macchine operatrici in diverse condizioni di lavoro. Di conseguenza, si è evidenziato quanto possono essere diversi i risultati di impatto ambientale relativi alla medesima operazione, ma ottenuti utilizzando dati di inventario riguardanti condizioni di lavoro “medie” che vengono adottati acriticamente. Ciò è necessario per rendere consapevoli i decisori politici e tutte le parti interessate dell'importanza di evitare semplificazioni eccessive e informazioni generiche.
Le diverse operazioni che sono state studiate, rappresentative per il contesto produttivo della Pianura Padana, sono state analizzate con ENVIAM (ENVironmental Inventory of Agricultural Machinery operations). ENVIAM è un foglio di calcolo sviluppato per quantificare i dati di inventario delle operazioni agricole considerando le variabili di tipo meccanico di trattori e macchine operatrici, le scelte sulla tipologia di accoppiamento tra gli stessi, la ripartizione dei tempi di lavoro e le variabili pedo-climatiche locali. I risultati ottenuti dalla relativa valutazione di impatto ambientale hanno mostrato delle differenze non trascurabili. Pertanto, risulta evidente come la scelta delle macchine (trattori e macchine operatrici) influenzi profondamente la sostenibilità ambientale delle produzioni agricole, principalmente in termini di consumo di combustibile, olio lubrificante e materiali, nonché delle emissioni dei gas di scarico del motore e delle sostanze nutritive rilasciate in aria, suolo e acqua. Tra questi, l'attenzione è stata rivolta ai combustibili e ai gas di scarico del motore e, per approfondire la conoscenza sul sistema e migliorare l’affidabilità dello strumento di calcolo di inventario, sono state eseguite delle prove su molteplici operazioni di campo utilizzando un trattore equipaggiato con GPS, CAN-bus, software di registrazione dei dati Dewesoft® e analizzatore di emissioni Testo®. Ciò ha consentito di raccogliere dati durante le operazioni in campo ed elaborarli per ciascuno degli stati di lavoro identificati (lavoro effettivo, svolte in capezzagna, tempi di stop e trasporto).
Inoltre, nella Tesi di Dottorato è stata eseguita un'analisi sull'indicatore Water Footprint (WF) poiché la risorsa idrica è fondamentale per le produzioni agricole e per le problematiche di sostenibilità ambientale. Analizzando la letteratura sono emerse delle critiche metodologiche sull'approccio di calcolo adottato per il WF, principalmente in relazione alla quantificazione di WFblue e WFgrey. Pertanto, sono stati suggeriti alcuni miglioramenti, tra cui l’introduzione del Pollution Water Indicator (PWI) che permette di valutare qualitativamente il WFgrey con il supporto delle categorie di impatto caratteristiche dell’LCA che si riferiscono all’impatto sulla risorsa idrica.
I risultati ottenuti dall'analisi delle operazioni di campo e dalla valutazione sui dati per la compilazione degli inventari hanno permesso di identificare le combinazioni alternative di trattori e macchine operatrici che hanno un impatto ambientale più contenuto rispetto ad altri. Inoltre, sono state identificate le condizioni di lavoro che dovrebbero essere adottate positivamente quando si lavora con il trattore utilizzato durante le prove di campo e le misure in campo hanno anche permesso di avere dati affidabili per quantificare l'impatto ambientale delle operazioni analizzate. Infine, per quanto riguarda lo studio del WF, i risultati ottenuti dall'introduzione del PWI hanno permesso di valutare l'inquinamento della risorsa idrica nelle produzioni agricole senza omettere importanti inquinanti.
In conclusione, i risultati di questa Tesi di Dottorato possono essere adottati per avere una metodologia di analisi dei sistemi produttivi che consenta di valutare la variabilità locale e di raggiungere una maggiore affidabilità nei risultati e, inoltre, per aiutare i decisori politici a introdurre politiche e sistemi di incentivazione adeguati a supportare la sostenibilità ambientale dei sistemi agro-alimentari.The environmental sustainability of agricultural productions has gained wide interest worldwide. For the scientific community, understanding the behaviour of agricultural production systems on the environmental impact perspective with a holistic view and quantifying the environmental benefits arising from the selection of a sequence of operations or another, permits to identify and suggest the introduction of beneficial improvements for society and future generations. This PhD Thesis was aimed to study how to make adequately reliable the inventories in view of performing environmental sustainability assessments about agricultural machinery production systems. For these, local pedo-climatic and work-specific characteristics affect considerably both the completion of inventories and the outcomes of Life Cycle Assessment (LCA) studies. In detail, in this Thesis are quantified with LCA the environmental impacts of agricultural field operations for seedbed preparation (i.e. primary and secondary soil tillage) and for organic fertilisers spreading techniques. This has been done by studying the use of different machinery in different working conditions and, consequently, highlighting how different environmental outcomes can be obtained when average inventory data are used uncritically. This makes policy makers and stakeholders aware of the importance of avoiding such simplifications and general information. The alternative operations that were studied, representative of the Italian Po Valley, were analysed with the tool ENVIAM (ENVironmental Inventory of Agricultural Machinery operations). ENVIAM was developed to quantify inventory data for agricultural field operations, considering the mechanical variability of machinery (i.e. of tractors and implements), the coupling choices between tractor and implement, the organisation of working time and the local pedo-climatic variables. The related environmental impact results showed not negligible differences. Accordingly, the choice of machinery greatly influences the environmental sustainability of agricultural productions, mainly in terms of fuel consumption, lubricating oil and materials consumption as well as of emissions of engine exhaust gases and of nutrients to air, soil and water. Among them, the focus was paid to fuel and engine exhaust gases. For deepening knowledge and improving the reliability of the inventory calculation tool, field tests on several field operations were carried out using a tractor equipped with GPS, CAN-bus, Dewesoft® data logger and Testo® emissions analyser. This allowed collecting data during field operations and processing them within the identified work states (i.e. effective work, turns at the headlands, stops and transport). In addition, in the PhD Thesis an analysis of the Water Footprint (WF) indicator was carried out, because water resource is crucial for agricultural productions and environmental sustainability issues. By reviewing the literature, methodological criticisms emerged about the Water Footprint Network approach, mostly in relation to the quantification of WFblue and WFgrey. Therefore, some improvements have been suggested, among which the introduction of the Pollution Water Indicator (PWI). It was proposed to qualitatively evaluate WFgrey with the support of LCA’s impact categories that relate to the impact on water resources. The results got from the analysis of agricultural machinery operations and inventory data completion permitted to identify the alternatives for machinery that have a more restrained environmental impact respect to others. Moreover, the work conditions that should be adopted when working with the tractor used during the field trials were identified, which also allowed having reliable data for quantifying the environmental impact of the analysed field operations. Finally, regarding the WF study, the results that were obtained from the use of PWI permitted to assess water pollution of agricultural productions without omitting important pollutant sources. In conclusion, the outcomes of this PhD Thesis can be adopted to have a methodology for analysing local production systems that allows assessing local variability and achieving greater reliability in the results and, moreover, to help policy makers introduce policies and incentive systems appropriate to support the environmental sustainability of agri-food systems.
37
Zandonadi, Rodrigo S. "COMPUTATIONAL TOOLS FOR IMPROVING ROUTE PLANNING IN AGRICULTURAL FIELD OPERATIONS." UKnowledge, 2012. http://uknowledge.uky.edu/bae_etds/11.
Full textAbstract:
In farming operation, machinery represents a major cost; therefore, good fleet management can have a great impact on the producer’s profit, especially considering the increasing costs of fuel and production inputs in recent years. One of the tasks to be accomplished in order to improve fleet management is planning the path that the machine should take to cover the field while working. Information such as distance traveled, time and fuel consumption as well as agricultural inputs wasted due to off-target-application areas are crucial in the path planning process. Parameters such as field boundary size and geometry, machine total width as well as control width resolution present a great impact on the information necessary for path planning.
Researchers around the world have proposed methods that approach specific aspects related to path planning, the majority addressing machine field efficiency per-se, which a function of total time spent in the field as well as effective working time. However, wasted inputs due to off-target-application areas in the maneuvering regions, especially in oddly shaped agricultural fields might be as important as field efficiency when it comes down to the total operation cost. Thus, the main purpose of this research was to develop a path planning method that accounts for not only machinery field efficiency, but also the supply inputs.
This research was accomplished in a threefold approach where in the first step an algorithm for computing off-target application area was developed, implemented and validated resulting in a computational tool that can be used to evaluate potential savings when using automatic section control on agricultural fields of complex field boundary. This tool allowed accomplishment of the second step, which was an investigation and better understanding of field size and shape as well as machine width of the effects on off-target application areas resulting in an empirical method for such estimations based on object shape descriptors. Finally, a path planning algorithm was developed and evaluated taking into consideration the aspects of machine field efficiency as well as off-target application areas.
38
Decotelli, Carlos Alberto. "Agriculture Machines: Design: Sustainability." reponame:Repositório Institucional do FGV, 2017. http://hdl.handle.net/10438/18184.
Full textAbstract:
Submitted by Maria Almeida (maria.socorro@fgv.br) on 2017-04-18T18:33:02Z
No. of bitstreams: 2
Wuppertal em Inglês.pdf: 313762 bytes, checksum: 40471c76c842397f909a71840479a4ad (MD5)
POS DOC Alemão.pdf: 998614 bytes, checksum: a3bbf0c22a15a3625a02d94a7f28879c (MD5)Approved for entry into archive by Maria Almeida (maria.socorro@fgv.br) on 2017-04-18T18:35:34Z (GMT) No. of bitstreams: 2 Wuppertal em Inglês.pdf: 313762 bytes, checksum: 40471c76c842397f909a71840479a4ad (MD5) POS DOC Alemão.pdf: 998614 bytes, checksum: a3bbf0c22a15a3625a02d94a7f28879c (MD5)
Made available in DSpace on 2017-04-18T18:35:56Z (GMT). No. of bitstreams: 2 Wuppertal em Inglês.pdf: 313762 bytes, checksum: 40471c76c842397f909a71840479a4ad (MD5) POS DOC Alemão.pdf: 998614 bytes, checksum: a3bbf0c22a15a3625a02d94a7f28879c (MD5) Previous issue date: 2017
Being competitive in the production of food, using agricultural machinery with up-todate technologies and design, adjusted to the standards of international sustainability and serving customers, does not depend on the size of the company. It depends upon the awareness of the importance of defining the performance space that wants to be conquered in the market. Therefore, every agricultural machinery company needs to define the way it wants to be seen and remembered by its clients, which means the whole company being involved in the mechanization of agribusiness needs, in order to have a position in the market in which it is inserted. The present work aims to identify, based on the German company KRONE and Brazilian companies producing agricultural machines, the variables or positioning indicators that influence the decision making of farmers in the acquisition of high value agricultural machinery, guaranteeing design, sustainability and productivity. These variables can be used by companies to carry out the process of transferring technological innovations, aiming to increase or maintain their market share, by narrowing relations between agricultural producers and companies. The established positioning variables refer to farmers of greater perception when choosing a machine for a given crop. Thus, the relevant technical and / or behavioral factors that influence decision making at the time of purchase by food producers are identified. Through interviews with KRONE's business team and opinion formers in agribusiness, the motivations, perceptions, experiences, behaviors and intentions that directly interfere on the decision-making process are analyzed, and position variables are considered in this study. Knowing more about what and how their customers think, companies can improve their market position. For this reason, a new program for FGV was developed: Sustainability Machinery – Design. To get to know the Brazilian Market, 300 Brazilian Companies producing agricultural machines were interviewed. Companies are supposed to serve as partners in the new discipline, because they benefit from that. Furthermore, the concern with the proper design and sustainability of our world, takes a prominent place in the positioning variables.
39
Germino, Rogério 1976. "Atuação de forças em hastes sulcadoras de semeadoras-adubadoras para plantio direto /." Botucatu : [s.n.], 2004. http://hdl.handle.net/11449/90534.
Full textAbstract:
Orientador: Sérgio Hugo BenezBanca: Silvio José Bicudo
Banca: Rubens Siqueira
Resumo: O sistema de produção agrícola exige tecnologias cada vez mais aperfeiçoadas para seu desenvolvimento sustentável, tendo o sistema plantio direto contribuído diretamente nesse sentido, com o aperfeiçoamento de máquinas e equipamentos que melhor se adaptam as suas condições preliminares de implantação. Nesse quadro, as semeadoras-adubadoras são os equipamentos que sofrem as mais variadas modificações em sua constituição, pois nesse sistema o principio básico é o revolvimento somente na linha de semeadura, fazendo com que esses equipamentos realizem operações conjugadas associando qualidade e otimização dos recursos disponíveis. Uma técnica que vem sendo adotada pelos produtores é a substituição (nas semeadoras) dos discos duplos para deposição de adubos pelas hastes sulcadoras em maiores profundidades, com o objetivo de romper as camadas compactadas de solo, adiando assim o uso de escarificadores e subsoladores. Nesse sentido o presente estudo que foi realizado em condições de campo, com o objetivo de comparar dois modelos de hastes sulcadoras, uma comercial e uma experimental, para semeadoras adubadoras de plantio direto, determinado as forças atuantes e os momentos (Fx: força horizontal, Fy: força vertical, Fz: força lateral, My: momento transversal e Fz: momento longitudinal), variando quatro profundidades de trabalho (130mm, 230 mm, 280 mm e 330 mm) com e sem a utilização de disco de corte de palha. A haste Experimental apresentou maiores valores de força horizontal média (Fx), força vertical média (Fy), força lateral média (Fz), força horizontal máxima (Fx max), força vertical máxima (Fy max), força média por área de solo mobilizado (Fx/ASM), força horizontal específica (Fx esp.) momento transversal médio (My), momento longitudinal médio (Mz), momento transversal máximo (My max)... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: The agricultural system demands technologies more and more improved for its sustainable development, and agricultural system called no till has been contributed directly in that sense, with the improvement of machines and equipments that could be used with soil previous coverage. In this way row preparation shank are the equipments that suffer the most varied modifications in your constitution, because the basic concept is to revolve only the furrow, so those equipments have to have conjugated operations in consortium with quality and the improvement of the available resources. A technique that has been adopted by the farmers is the change (in the furrow openers) of the double disks for fertilizers deposition for a row preparation shank in higher depths. The objective of this change is to break the compacted layers of soil, postponing the usage of subsoiler and chisel plow witch are more expensive operations. In that sense the present study was accomplish in field conditions, with the objective of comparing two models of preparation shank for no till system, certain the active forcers and moments (Fx: horizontal force, Fy: vertical forces, Fz: lateral force, My: traverse moment and Mz: longitudinal moment), varying four work depths (130 mm, 230 mm, 280 mm and 330 mm) with and without the use of soil and residue cut disk. The experimental row preparation shank showed higher horizontal medium force values (Fx), vertical medium force (Fy), lateral medium force (Fz), horizontal maximum force (Fx max.), horizontal medium force by disturbed soil area (Fx/DSA), horizontal force by soil depth ( Fx sd) transverse medium moment (My), longitudinal medium moment (Mz), transverse maximum moment (My max.), longitudinal maximum moment (Mz max.), mximum power (P max.) e medium power (Pm). The showed differences ( row preparation shank) are related to their building structure. When we worked at... (Complete abstract click electronic access below)
Mestre
40
Nascimento, José Maria do. "Sistema plantio direto : população de plantas de milho e velocidade de semeadura em consórcio com braquiárias /." Jaboticabal : [s.n.], 2012. http://hdl.handle.net/11449/100806.
Full textAbstract:
Orientador: Carlos Eduardo Angeli FurlaniBanca: Rouverson Pereira da Silva
Banca: Jorge Wilson Cortez
Banca: Afonso Lopes
Banca: Wilson José Oliveira de Souza
Resumo: O sistema plantio direto como prática conservacionista associado a técnicas como a integração lavoura-pecuária, tem como foco principal otimizar o uso das áreas agrícolas. Nessa condição, a opção do consórcio de milho com forrageiras constitui uma alternativa para suprir o aporte anual de palha e tornar o sistema sustentável. O presente trabalho teve como objetivo, em dois anos agrícolas, avaliar, no primeiro, três forrageiras (Brachiaria brizantha, B. decumbens e B. ruzizienses) em consórcio com duas populações de plantas de milho e, no segundo, verificar o efeito da palhada dos tratamentos do ano anterior na semeadura do milho em duas velocidades do conjunto trator-semeadora. O experimento foi conduzido na área da Fazenda de Ensino, Pesquisa e Produção da UNESP/Jaboticabal, SP, o solo da área experimental é classificado como LATOSSOLO VERMELHO Eutroférrico típico, A moderado, textura argilosa. Foi utilizado o delineamento em blocos ao acaso, no esquema fatorial (2x3), com quatro repetições. No ano agrícola 2008/2009, os tratamentos foram constituídos por duas populações de plantas de milho (55 e 75 mil plantas ha-1) consorciado com três forrageiras semeadas na entrelinha 30 dias após a semeadura do milho, totalizando 24 parcelas. Para o ano agrícola 2009/2010, a semeadura do milho foi realizada nas mesmas parcelas do ano anterior, com palhada proporcionada pelo consórcio das três forrageiras com milho e duas velocidades de deslocamento do conjunto trator-semeadora (6,0 e 7,7 km h-1). A população de 75 mil plantas ha-1 em consórcio com B. brizantha e B. ruzizienses, promoveu maiores valores de produtividade de grãos e as forrageiras promoveram maior quantidade de massa seca residual, com maior porcentagem de cobertura do solo para brizantha (2008/2009). Para o segundo ano agrícola, a variação da... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: No tillage system as a conservation practice associated with techniques such as crop-livestock integration focuses primarily to optimize the use of agricultural areas. Given this condition, the option of corn intercropped with forage constitutes an alternative to supply the annual intake of straw and make the system sustainable. The study aimed, in two growing seasons, to evaluate in the first year three forages (Brachiaria brizantha, B. decumbens and B. ruzizienses) intercropped with two populations of corn plants, and in the second year to determine the effect of the straw treatment from previous year in two speeds of the tractor-seed drill. The experiment was conducted in the experimental area of the Laboratory of Agricultural Machinery and Mechanization of UNESP / Jaboticabal County, São Paulo State, Brazil. The soil is classified as typiceutroferric Red Latossol, clayey. Randomized blocks design was used for the experimental layout forming a factorial arrangement of 2x3 with 4 replications. In the crop year of 2008/2009, treatments consisted of two corn plants populations (55 and 75 000 plants ha-1) sown intercropped with three forages 30 days after sowing of corn, totaling 24 plots. For crop year of 2009/2010 corn sowing was performed on the same plots as in the previous year but with two forward speeds of the tractor-seeder (6.0 and 7.7 km h-1), over the straw provided by the consortium of the corn and three forages. The population of 75,000 plants ha-1 in association with B. brizantha and B. ruziziensis promoted the highest values for grain productivity, and the forages promoted greater amount of residual dry matter, being B brizantha (2008/2009) with the highest percentage of soil cover. For the second crop season, speed variation of seeding affected the operational performance of the... (Complete abstract click electronic access below)
Doutor
41
Balestra, Mônica Regina Gonzatti. "Efeitos da aquisição de tratores agrícolas por meio do Pronaf Mais Alimentos na região Central do Rio Grande do Sul – da economia à segurança." Universidade Federal de Pelotas, 2016. http://repositorio.ufpel.edu.br:8080/handle/prefix/3769.
Full textAbstract:
Submitted by Gabriela Lopes (gmachadolopesufpel@gmail.com) on 2018-02-07T14:46:02Z
No. of bitstreams: 2
license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)
Tese Mônica Balestra.pdf: 1376133 bytes, checksum: fe8267205634b755ee0ae9ea46842be0 (MD5)Approved for entry into archive by Aline Batista (alinehb.ufpel@gmail.com) on 2018-02-08T12:41:05Z (GMT) No. of bitstreams: 2 Tese Mônica Balestra.pdf: 1376133 bytes, checksum: fe8267205634b755ee0ae9ea46842be0 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)
Made available in DSpace on 2018-02-08T12:41:05Z (GMT). No. of bitstreams: 2 Tese Mônica Balestra.pdf: 1376133 bytes, checksum: fe8267205634b755ee0ae9ea46842be0 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2016-09-02
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES
Com o aquecimento da economia e com os subsídios advindos do governo, a agricultura familiar foi estimulada a se inserir no mercado, de forma mais organizada e competitiva. No aspecto social, representa uma retomada aos valores da terra e do meio ambiente, pois produz em menor escala e de forma diversificada. Com a demanda por produtos originados da agricultura familiar e com a facilidade na aquisição de máquinas e equipamentos agrícolas, a pequena propriedade rural está substituindo o trabalho realizado de forma braçal pela realização de tarefas de forma mecanizada. Fatores como a escassa mão de obra, a demanda por alimentos e o mercado de máquinas e equipamentos agrícolas, expandido pelos incentivos fornecidos pelo Governo Federal, proporcionaram que esses estabelecimentos se tornassem mais produtivos, aderindo à mecanização parcial ou total de suas atividades. Desta forma, este estudo teve como principal objetivo diagnosticar como a aquisição de tratores agrícolas por meio do Pronaf Mais Alimentos modificou o cenário e a economia das propriedades rurais. O trabalho foi desenvolvido através de análise de 243 projetos para aquisição de tratores agrícolas, elaborados pela Emater/Ascar-RS, que utilizaram a linha de crédito do Pronaf Mais Alimentos na Região Centro do estado do Rio Grande do Sul. Na pesquisa de campo desenvolvida em 69 propriedades rurais verificou-se que mesmo com a parcela do financiamento adquirido, a renda bruta anual das propriedades aumentou e os cultivos característicos das propriedades foram alterados. Constatou-se que na tomada de decisão de escolha do trator são considerados os fatores potência e valor disponível do financiamento, não sendo considerada o tamanho da propriedade e os custos com manutenção do trator adquirido. A modernização da propriedade rural através da aquisição do trator agrícola deveria reduzir o desgaste físico e os riscos ocupacionais do trabalho executado no campo. Contudo, ao analisar os modelos adquiridos foram encontrados níveis muito baixos em relação a conformidade com normas técnicas e regulamentadoras, demonstrando que embora sejam máquinas novas, os seus projetos não estão considerando melhorias que façam com o que trabalho rural seja realizado com maior conforto e segurança.
With the economic recovery and the benefits arising from the Federal Government, the Family Agriculture was encouraged to enter the market in a more organized and competitive way. In the social aspect, it is a return to the values of the land and the environment because family farmers produce in smaller scale and with more diversity. With the demand for products originating from family farming and with the ease of acquisition of machinery and equipment, the small farm is replacing hand work by mechanized tasks. Factors such as the limited manpower, the demand for food and agricultural machinery and equipment market, which expanded by incentives provided by the Federal Government, made that these farms become more productive by joining the partial total mechanization of their activities. Thus, this study aimed to diagnose how the acquisition of tractors through Pronaf Mais Alimentos changed the landscape and the economy of rural properties. The work was developed through analysis of 243 projects for the acquisition of agricultural tractors that use the credit line Pronaf Mais Alimentos elaborated by the rural extension agency Emater/Ascar-RS in central region of the Rio Grande do Sul state, Brazil. In field research conducted in 69 rural properties we found that even considering the portion of the acquired funding, the annual gross income of the properties increased and the characteristic cultivation crops of the properties have changed. We found that in making tractor choice decision the factors considered were the engine power and value of available funding, not considering the size of the property and the maintenance costs of the purchased tractor. The modernization of rural property by acquiring the tractor should reduce physical wear and occupational risks of the work performed in the field. However, when analyzing the acquired models we found very low levels of compliance in relation to technical and regulatory standards, demonstrating that although they were brand new machines, their designs are not considering improvements in order to provide rural work with greater comfort and safety
42
Semmel, Harald. "Auswirkungen kontrollierter Bodenbelastungen auf das Druckfortpflanzungsverhalten und physikalisch-mechanische Kenngrössen von Ackerböden /." Kiel : Institut für Pflanzenernährung und Bodenkunde, Universität Kiel, 1993. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=006456235&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.
Full text
43
Whelan, Angela Mary. "The effect of technical change on existing patterns of intra-industry trade : a case study of the UK agricultural machinery industry." Thesis, University of Sussex, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.235498.
Full text
44
Navarro, Miró David. "Gestió dels sistemes hortícoles ecològics a Europa mitjançant la introducció de cultius amb serveis agroecològics i la seva gestió amb el roller crimper." Doctoral thesis, Universitat de Barcelona, 2020. http://hdl.handle.net/10803/672133.
Full textAbstract:
La introducció dels cultius que proveeixen serveis agroecològics (ASC) és una de les estratègies àmpliament reconeguda per millorar la sostenibilitat dels sistemes de cultiu. Tot i això, algunes autores i autors han assenyalat que la tècnica seleccionada per a la gestió dels ASC afecta els serveis subministrats. Entre les agricultores i agricultors ecològics europeus, la tècnica de gestió més estesa consisteix a tallar i picar els ASC i incorporar el material vegetal al sòl mitjançant la llaurada com a adobs verds (T-GM). No obstant això, en els darrers anys, l’ús del roller crimper (NT-RC) per a la gestió dels ASC ha atret l’interès de les persones agricultores i investigadores a tot Europa, perquè permet aplanar els ASC creant una densa capa de residus vegetals a la superfície sense pertorbar el sòl.
Els pocs estudis realitzats en sistemes hortícoles europeus, la majoria d’ells realitzats a Itàlia, han analitzat l'efecte de la introducció i la gestió dels ASC mitjançant el NT-RC sobre l'abundància de flora arvense, la producció del cultiu i els balanços d'energia. A més, la majoria dels estudis s'han dut a terme sota les condicions particulars de llocs experimentals específics, que poden haver influït en els resultats obtinguts.
Per tal d’omplir aquest buit de coneixement, aquesta tesi doctoral pretén proporcionar una visió més detallada dels efectes del NT-RC en diferents condicions agro-edafo-climàtiques d’Europa, mitjançant l’anàlisi conjunta de les dades provinents d’experiments paral·lels realitzats durant dos anys en diversos països europeus. Cada experiment es va realitzar sota les seves pròpies condicions pedo-climàtiques i de disseny experimental. Per aquest motiu es va fer servir un enfocament meta-analític, basat en una versió ponderada del mètode de Stouffer, per analitzar l'efecte de manera conjunta als diversos països analitzats de la gestió dels ASC sobre el funcionament dels agroecosistemes.
Els nostres resultats indiquen que la inversió mitjana energètica va ser un 19,73% major en els sistemes que incorporen l’ASC que els sistemes sense ASC. No obstant això, les estratègies de gestió que utilitzen l’ASC tendeixen a augmentar l'energia que potencialment es podria reciclar dins del sistema de cultiu. Els resultats també mostren que el sistema de gestió NT-RC redueix l'eficiència productiva comercialitzable respecte a T-GM, però millora el rendiment ambiental mitjançant l’augment de l'energia potencial que es pot reciclar dins del sistema de cultiu en una àmplia gamma de condicions pedo-climàtiques europees.
La densitat mitjana de la flora arvense va ser un 35,1% menor a les parcel·les de NT-RC que a T-GM, i aquesta tendència va ser significativa en els diversos experiments analitzats. A més, es va documentar una reducció significativa de la riquesa d'espècies arvenses i canvis significatius, però, de manera general, menors en la composició florística de la comunitat arvense amb la gestió NT-RC en comparació amb T-GM. Tot i això, és important tenir en compte que l'efecte d'aquesta tecnologia es pot veure fortament afectat per les variacions de les condicions de cultiu.
A més, els nostres resultats evidencien que en les parcel·les en què els ASC es van gestionar mitjançant el NT-RC es va incrementar la densitat en activitat dels caràbids i estafilínids, el reciclatge d’energia potencial del sistema i el control de flora arvense en comparació amb T-GM en les diferents condicions pedo-climàtiques d'Europa analitzades. No obstant això, a les parcel·les gestionades amb el NT-RC el rendiment del cultiu comercial i la seva qualitat, l'eficiència energètica de la producció i la densitat en activitat de les aranyes va ser menor que a T-GM.
45
Germino, Rogério [UNESP]. "Atuação de forças em hastes sulcadoras de semeadoras-adubadoras para plantio direto." Universidade Estadual Paulista (UNESP), 2004. http://hdl.handle.net/11449/90534.
Full textAbstract:
Made available in DSpace on 2014-06-11T19:24:41Z (GMT). No. of bitstreams: 0
Previous issue date: 2004-06-22Bitstream added on 2014-06-13T18:52:28Z : No. of bitstreams: 1
germino_r_me_botfca.pdf: 456472 bytes, checksum: 42cad9c8d5700d79e139d6a62b9f0426 (MD5)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Universidade Estadual Paulista (UNESP)
O sistema de produção agrícola exige tecnologias cada vez mais aperfeiçoadas para seu desenvolvimento sustentável, tendo o sistema plantio direto contribuído diretamente nesse sentido, com o aperfeiçoamento de máquinas e equipamentos que melhor se adaptam as suas condições preliminares de implantação. Nesse quadro, as semeadoras-adubadoras são os equipamentos que sofrem as mais variadas modificações em sua constituição, pois nesse sistema o principio básico é o revolvimento somente na linha de semeadura, fazendo com que esses equipamentos realizem operações conjugadas associando qualidade e otimização dos recursos disponíveis. Uma técnica que vem sendo adotada pelos produtores é a substituição (nas semeadoras) dos discos duplos para deposição de adubos pelas hastes sulcadoras em maiores profundidades, com o objetivo de romper as camadas compactadas de solo, adiando assim o uso de escarificadores e subsoladores. Nesse sentido o presente estudo que foi realizado em condições de campo, com o objetivo de comparar dois modelos de hastes sulcadoras, uma comercial e uma experimental, para semeadoras adubadoras de plantio direto, determinado as forças atuantes e os momentos (Fx: força horizontal, Fy: força vertical, Fz: força lateral, My: momento transversal e Fz: momento longitudinal), variando quatro profundidades de trabalho (130mm, 230 mm, 280 mm e 330 mm) com e sem a utilização de disco de corte de palha. A haste Experimental apresentou maiores valores de força horizontal média (Fx), força vertical média (Fy), força lateral média (Fz), força horizontal máxima (Fx max), força vertical máxima (Fy max), força média por área de solo mobilizado (Fx/ASM), força horizontal específica (Fx esp.) momento transversal médio (My), momento longitudinal médio (Mz), momento transversal máximo (My max)...
The agricultural system demands technologies more and more improved for its sustainable development, and agricultural system called no till has been contributed directly in that sense, with the improvement of machines and equipments that could be used with soil previous coverage. In this way row preparation shank are the equipments that suffer the most varied modifications in your constitution, because the basic concept is to revolve only the furrow, so those equipments have to have conjugated operations in consortium with quality and the improvement of the available resources. A technique that has been adopted by the farmers is the change (in the furrow openers) of the double disks for fertilizers deposition for a row preparation shank in higher depths. The objective of this change is to break the compacted layers of soil, postponing the usage of subsoiler and chisel plow witch are more expensive operations. In that sense the present study was accomplish in field conditions, with the objective of comparing two models of preparation shank for no till system, certain the active forcers and moments (Fx: horizontal force, Fy: vertical forces, Fz: lateral force, My: traverse moment and Mz: longitudinal moment), varying four work depths (130 mm, 230 mm, 280 mm and 330 mm) with and without the use of soil and residue cut disk. The experimental row preparation shank showed higher horizontal medium force values (Fx), vertical medium force (Fy), lateral medium force (Fz), horizontal maximum force (Fx max.), horizontal medium force by disturbed soil area (Fx/DSA), horizontal force by soil depth ( Fx sd) transverse medium moment (My), longitudinal medium moment (Mz), transverse maximum moment (My max.), longitudinal maximum moment (Mz max.), mximum power (P max.) e medium power (Pm). The showed differences ( row preparation shank) are related to their building structure. When we worked at... (Complete abstract click electronic access below)
46
Nascimento, José Maria do [UNESP]. "Sistema plantio direto: população de plantas de milho e velocidade de semeadura em consórcio com braquiárias." Universidade Estadual Paulista (UNESP), 2012. http://hdl.handle.net/11449/100806.
Full textAbstract:
Made available in DSpace on 2014-06-11T19:31:01Z (GMT). No. of bitstreams: 0
Previous issue date: 2012-01-24Bitstream added on 2014-06-13T21:01:56Z : No. of bitstreams: 1
nascimento_jm_dr_jabo.pdf: 470384 bytes, checksum: f204b878182346a08975c166192d44c4 (MD5)Fundação de Apoio ao Desenvolvimento do Ensino, Ciência e Tecnologia do Estado de Mato Grosso do Sul (FUNDECT)
O sistema plantio direto como prática conservacionista associado a técnicas como a integração lavoura-pecuária, tem como foco principal otimizar o uso das áreas agrícolas. Nessa condição, a opção do consórcio de milho com forrageiras constitui uma alternativa para suprir o aporte anual de palha e tornar o sistema sustentável. O presente trabalho teve como objetivo, em dois anos agrícolas, avaliar, no primeiro, três forrageiras (Brachiaria brizantha, B. decumbens e B. ruzizienses) em consórcio com duas populações de plantas de milho e, no segundo, verificar o efeito da palhada dos tratamentos do ano anterior na semeadura do milho em duas velocidades do conjunto trator-semeadora. O experimento foi conduzido na área da Fazenda de Ensino, Pesquisa e Produção da UNESP/Jaboticabal, SP, o solo da área experimental é classificado como LATOSSOLO VERMELHO Eutroférrico típico, A moderado, textura argilosa. Foi utilizado o delineamento em blocos ao acaso, no esquema fatorial (2x3), com quatro repetições. No ano agrícola 2008/2009, os tratamentos foram constituídos por duas populações de plantas de milho (55 e 75 mil plantas ha-1) consorciado com três forrageiras semeadas na entrelinha 30 dias após a semeadura do milho, totalizando 24 parcelas. Para o ano agrícola 2009/2010, a semeadura do milho foi realizada nas mesmas parcelas do ano anterior, com palhada proporcionada pelo consórcio das três forrageiras com milho e duas velocidades de deslocamento do conjunto trator-semeadora (6,0 e 7,7 km h-1). A população de 75 mil plantas ha-1 em consórcio com B. brizantha e B. ruzizienses, promoveu maiores valores de produtividade de grãos e as forrageiras promoveram maior quantidade de massa seca residual, com maior porcentagem de cobertura do solo para brizantha (2008/2009). Para o segundo ano agrícola, a variação da...
No tillage system as a conservation practice associated with techniques such as crop-livestock integration focuses primarily to optimize the use of agricultural areas. Given this condition, the option of corn intercropped with forage constitutes an alternative to supply the annual intake of straw and make the system sustainable. The study aimed, in two growing seasons, to evaluate in the first year three forages (Brachiaria brizantha, B. decumbens and B. ruzizienses) intercropped with two populations of corn plants, and in the second year to determine the effect of the straw treatment from previous year in two speeds of the tractor-seed drill. The experiment was conducted in the experimental area of the Laboratory of Agricultural Machinery and Mechanization of UNESP / Jaboticabal County, São Paulo State, Brazil. The soil is classified as typiceutroferric Red Latossol, clayey. Randomized blocks design was used for the experimental layout forming a factorial arrangement of 2x3 with 4 replications. In the crop year of 2008/2009, treatments consisted of two corn plants populations (55 and 75 000 plants ha-1) sown intercropped with three forages 30 days after sowing of corn, totaling 24 plots. For crop year of 2009/2010 corn sowing was performed on the same plots as in the previous year but with two forward speeds of the tractor-seeder (6.0 and 7.7 km h-1), over the straw provided by the consortium of the corn and three forages. The population of 75,000 plants ha-1 in association with B. brizantha and B. ruziziensis promoted the highest values for grain productivity, and the forages promoted greater amount of residual dry matter, being B brizantha (2008/2009) with the highest percentage of soil cover. For the second crop season, speed variation of seeding affected the operational performance of the... (Complete abstract click electronic access below)
47
Sari, Pelin. "Preliminary Design And Construction Of A Prototype Canola Seed Oil Extraction Machine." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/12607357/index.pdf.
Full textAbstract:
Growing energy demand in the world force people to investigate alternative energy sources. Unlike coal or other fossil fuels, renewable energy sources are promising for the future. Especially, seed oils are effectively used as energy sources such as fuel for diesel engines. The scope of this study is to develop an oil extraction machine specific to canola seed.
In this study, seed oil extraction methods have been investigated and various alternatives for the extraction machine have been considered. For continuous operation, oil extraction with a screw press is evaluated as the most appropriate solution. Four different prototypes have been designed and manufactured. According to the results of testing of prototypes, they have been modified and gradually improved to increase oil extraction efficiency. The working principle of the selected screw press based on the rotation of a tapered screw shaft mounted inside a grooved vessel. The screw shaft is a single square-threaded power screw having an increasing root diameter from inlet to exit while the outside diameter of the screw shaft is 66 mm. Seeds are taken into the system at the point where the depth of the screw thread is maximum. Then they are pushed forward by the threads on the rotating screw shaft and pass through inside the vessel. So, the fed seeds are compressed as they move to the other side of the vessel. Recovered oil escapes from high pressure zone and drains back. The oil is drained out from the oil drainage holes that are machined on high pressure zone of the vessel. Besides, the cake is extruded at the end of the vessel and the screw shaft. The cake thickness is adjustable by the axial movement of the screw shaft. By adjusting the cake thickness, different pressures can be obtained.
During the experiments, it is observed that four main features affect the oil recovery rate. These are the geometry of the grooves inside the vessel, the taper angle of the screw shaft, the operating temperature and the rotational speed. With the final prototype, an oil recovery efficiency of 62.5% has been achieved at 40 rpm with 15 kg/h seed capacity. Since the oil content of the seed is taken as 40%, oil recovery rate of the developed oil extraction machine is 3.75 kg/h. This efficiency is determined for a 0.8 mm cake thickness at 1.1 kW motor ower.
48
Manoel, Filho Francisco 1974. "Projeto de um controlador fuzzy-PI para ajuste automático de velocidade da colhedora de cana de açúcar." [s.n.], 2013. http://repositorio.unicamp.br/jspui/handle/REPOSIP/256779.
Full textAbstract:
Orientador: Nelson Luís CappelliTese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Agrícola
Made available in DSpace on 2018-08-23T21:10:32Z (GMT). No. of bitstreams: 1 ManoelFilho_Francisco_D.pdf: 3152234 bytes, checksum: ee75d133cc1ae9127b6dc69d40671dc7 (MD5) Previous issue date: 2013
Resumo: A mecanização da colheita de cana é um processo irreversível no Brasil, tanto por aspectos ambientais quanto econômicos. A agroindústria canavieira da Região Sudeste tem o maior índice de mecanização, compondo a maior frota de colhedoras de cana picada do país. Essas máquinas oferecem diversos dispositivos, visando uma colheita limpa e sem perdas visíveis. Contudo, a literatura científica relata significativos índices de perdas e impurezas associados à colheita mecanizada da cana, em razão da ineficiência destes dispositivos e também pelo seu uso inadequado. Afim de minimizar erros operacionais, este trabalho apresenta o projeto de um controlador fuzzy-PI para ajuste automático da velocidade da colhedora de cana picada em função das condições operacionais. O desenvolvimento desse projeto envolveu a construção de uma base de conhecimento especialista contendo a experiência de profissionais da colheita mecanizada da cana na condução da colhedora. A partir dessa base de conhecimento, utilizando-se o "Fuzzy Logic Toolbox" do MATLAB, desenvolveu-se um sistema especialista fuzzy, com a função de indicar um índice que representa a velocidade de deslocamento da colhedora. Esse sistema especialista combinou dois Fuzzy Inference System, um para as variáveis relacionadas à Cultura e outro para as variáveis relacionadas ao Ambiente. No projeto do controlador, o sistema especialista foi integrado como gerador de setpoint de velocidade, e envolveu a construção do diagrama de blocos do sistema hidráulico no MATLAB-Simulink, que foi parametrizado segundo a especificação dos componentes da colhedora. A validação do sistema foi feita através de cenários operacionais específicos, simulados no modelo e confrontados por especialistas na área, alcançando 86,5% de acerto, indicando potencial técnico para a implantação do controlador
Abstract: The mechanization of the sugarcane harvest is an irreversible process in Brazil, both environmental and economic aspects. The sugar cane industry in the southeast region has the highest rate of mechanization, composing the largest fleet of combines chopped cane country. These machines offer several devices, targeting a harvest clean and without visible losses. However, the scientific literature reports significant loss ratios and impurities due to mechanized harvesting of sugarcane due to the inefficiency of these devices and also for its misuse. In order to minimize operational errors, this search presents the design of a fuzzy-PID controller for automatic adjustment of the speed of sugar cane harvester according to operating conditions. The development of this project involved the construction of a knowledge base containing the expertise of specialists in mechanical harvesting of sugarcane in driving the harvester. From this knowledge base, using the MATLAB Fuzzy Logic Toolbox, it was developed a fuzzy expert system with the function of indicating an index that represents the speed of the harvester. This expert system combined two Fuzzy Inference System, one for the variables related to culture and other variables related to the environment. In the controller design, the expert system was integrated as generator speed setpoint, and involved the built of block diagram of hydraulic system in MATLAB-Simulink, which was parameterized according to the specification of the components of the harvester. The validation of the system was done through specific operational scenarios simulated in the model, and confronted by experts in the field, reaching 86.5% accuracy, indicating technical potential for the deployment of the driver
Doutorado
Maquinas Agricolas
Doutor em Engenharia Agrícola
49
Tangerino, Giovana Tripoloni. "Sistemas de sensoriamento embarcado para uso em controle de aplicações de insumos agrícolas à taxa variável." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/18/18145/tde-02032010-153816/.
Full textAbstract:
O desenvolvimento de sistemas com capacidade de unir ferramentas tecnológicas é de grande importância para oferecer apoio à Agricultura de Precisão e estimular a criação de grupos interdisciplinares para obter resultados favoráveis à produtividade agrícola. O objetivo desse trabalho é estudar as aplicações de sensoriamento embarcado em máquinas agrícolas, explorando a interface da agricultura com a computação e as engenharias mecânica e elétrica por meio de conceitos e tecnologias de sistemas de medidas. Foram desenvolvidos dois sistemas de sensoriamento embarcados. No primeiro realizou-se coleta de informações sobre refletância e altura das plantas em cultura de cana-de-açúcar. No segundo realizou-se coleta de informações e controle de aplicação de fertilizantes à taxa variável baseado em informações de refletância em cultura de milho. Utilizou-se os sensores Crop Circle (medidas de refletância para monitoramento de status da planta), Sonar (medida de altura de plantas) e GPS (Sistema de Posicionamento Global), com os quais foram realizados ensaios para determinar possíveis fontes de erro em uma operação agrícola. Os sistemas desenvolvidos cumpriram o papel de integradores de conhecimento, possibilitando observações práticas sobre necessidades, falhas e acertos no desenvolvimento de sistemas embarcados para uso em aplicações agrícolasThe development of systems able to join different technological tools is very important in order to provide support for Precision Agriculture and it stimulates the creation of interdisciplinary teams to obtain favorable results to increase agricultural productivity. The main goal of this work is to study applications of embedded sensing systems in agricultural machines, exploring the interface between computer science, mechanical, electrical, and agricultural engineering using concepts and technologies of measurement systems. It was developed two on board sensing systems. The first system collected the data of crop reflectance and plant height in sugar cane growing area. The second one controlled the variable rate fertilizer distribution based on reflectance of maize crop. Were used the sensors Crop Circle (reflectance to monitor the status of the plant), Sonar (plant height) and GPS (Global Positioning System), which were applied to detect some possible error sources during field operation. The systems developed fulfilled the role of integrating knowledge, providing practical observations about the needs, failures and successes in developing embedded systems for use in agricultural production
50
Mendoza, Tijerino Francisco Antonio [Verfasser], and Thomas [Akademischer Betreuer] Berger. "Climate change and agricultural structural change : the relevance for machinery use and acquisition in Germany / Francisco Antonio Mendoza Tijerino ; Betreuer: Thomas Berger." Hohenheim : Kommunikations-, Informations- und Medienzentrum der Universität Hohenheim, 2021. http://d-nb.info/1238142583/34.
Full text