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Dissertations / Theses on the topic 'Rice and Agricultural Practices'
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Kashem, M. A. "Obstacles to the adoption of modern rice cultivation practices by small farmers in Bangladesh." Thesis, University of Reading, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.373948.
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Puig, Xavier 1975. "Agricultural practices, biodiversity and ecosystem services provided by bats in Mediterranean crops." Doctoral thesis, Universitat de Girona, 2021. http://hdl.handle.net/10803/672824.
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We study the effect of organic farming practices on several taxa in olive groves and vineyards. Sessile organisms show a stronger response to treatment, their diversity being higher in organic vineyards. Vagile organism show a less intense response, with the most mobile taxa (birds) showing no farming treatment related differences. Organic olive groves are preferred over conventional groves by some endangered bat species (Rhinolophus spp.), thus stressing their importance for bat conservation. We analize the regulatory ecosystems services bats exert in rice paddies. Bats predate on both agricultural pests (moths and midges) and disease-bearing pests (mosquitoes). The intensity with which they track pests is linked to the cost-benefit trade-off, more evidently shifting their hunting grounds when bigger pests are available. Their economic impact has been assessed in terms of the avoided pesticide cost per hectare of rice crop and year at around 50€<br>Evaluem l’efecte del maneig ecològic de vinyes i oliverars sobre diversos grups taxonòmics. Els organismes sèssils mostren diversitats majors en ecològic. Els organismes vàgils mostren una resposta més moderada, i els organismes més mòbils analitzats (aus) no mostren diferencies entre pràctiques agrícoles. Els oliverars ecològics són seleccionats positivament per part d’especies amenaçades de ratpenats (Rhinolophus spp.), posant-se de manifest la seva importància per a la conservació. Analitzem els serveis ecosistèmics de regulació que els ratpenats exerceixen en els arrossars. Els ratpenats depreden tant sobre plagues agrícoles (arnes i quironòmids) com sobre vectors de malalties humanes (mosquits). La intensitat amb la que segueixen els moviments de les plagues per alimentar-se’n depèn del compromís cost-benefici, canviant les seves zones d’alimentació de forma evident quan hi ha plagues de major mida. L’impacte econòmic en quant als costos evitats de pesticida per hectàrea y any s’ha estimat en uns 50€<br>Programa de Doctorat en Medi Ambient
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Atwill, Richard Lee II. "Evaluation of water and nitrogen management practices in southern US rice (Oryza sativa L.) production." Thesis, Mississippi State University, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=1586943.
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<p> Nitrogen (N) fertility and irrigation costs are the greatest input expenses required for rice production in Mississippi, therefore N management and irrigation should be conducted in efficiently. Field experiments were conducted at the Delta Research and Extension Center in Stoneville, MS, and the LSU AgCenter in Crowley, LA, to evaluate water and nitrogen management practices. Nitrogen use efficiency and yield were not different for alternate wetting and drying (AWD) systems compared to a traditional continuous flood. Additionally, experiments were conducted to test for differences comparing two experimental designs, randomized complete block (RCB) and split-plot (SP), for N-rate response trials in Mississippi. Rice grain yield response to N-rate was similar for RCB and SP designs, therefore either experimental design would be appropriate for N-response experiments in rice. Increasing efficiency of water and N management practices further improves environmental and economic benefits from rice production in Mississippi.</p>
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Adams, Charles Andrew. "Impact of water management and agronomic practices on the performance of insecticide seed treatments against rice water weevil, Lissorhoptrus oryzophilus Kuschel, in Mississippi rice." Thesis, Mississippi State University, 2013. http://pqdtopen.proquest.com/#viewpdf?dispub=1536056.
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<p> Two field trials were conducted to determine the impact of water management on the efficacy of insecticide seed treatments against rice water weevil, <i> Lissorhoptrus oryzophilus</i> Kuschel, in rice at the Delta Research and Extension Center during 2011 and 2012. The performance of thiamethoxam, chlorantraniliprole, and clothianidin was evaluated when the permanent flood was established at different timings (6 and 8 weeks after planting) and the effect of flush number (0, 1, or 2) on seed treatment performance was evaluated. Seed treatment efficacy was not impacted by delayed flooding, but 2 flushes reduced efficacy of some seed treatments. </p><p> Experiments were also conducted to determine the impact of reduced seeding rates found in hybrid rice production on the efficacy of insecticide seed treatments targeting rice water weevil. Efficacy was similar when comparing currently labeled rates of thiamethoxam, chlorantraniliprole, and clothianidin with higher rates of these products.</p>
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Le, Thi Thanh Ly. "Assessment of the sustainability of the rice-maize cropping system in the Red River Delta of Vietnam and developing reduced tillage practices in rice-maize system in the area." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-176619.
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Rice and maize are global staple food and play an important role in world’s food security strategy. Vietnam is one of rice leading export countries but annually it has to import a considerate amount of maize for cattle food processing. Red River Delta in the north of Vietnam is the second rice bucket of the country, which is responsible formore than 20% of total rice production. The priority crops in the areas are rice and maize and rice-maize system is the leading cropping system in the area. Currently, it is reported that the rice-maize cropping system is not sustainable and its profit is reducing in most of production areas in the Red River Delta. Improving rice cropping system aims is not only to increase rice and maize yields and production but also to improve the land use efficiency, decline the cost of the production and to increase system sustainability. To increase sustainability there must be a linkage of various factors. This review emphasizes on increasing rice-maize crop sustainability by applying appropriate agriculture practices such as reducing chemical fertilization and intensive tillage<br>Gạo và ngô là nguồn lương thực chính cho toàn cầu và đóng một vai trò quan trọng trong chiến lược an ninh lương thực của thế giới. Việt Nam là một trong những nước dẫn đầu về xuất khẩu gạo nhưng hàng năm vẫn phải nhập một số lượng lớn ngô để chế biến thức ăn gia súc. Đồng bằng sông Hồng là một trong hai vựa lúa lớn của Việt Nam sản xuất khoảng 20% sản lượng lúa gạo của cả nước. Ở đồng bằng sông Hồng, lúa và ngô là hai cây trồng chính là hệ canh tác lúa-ngô là cơ cấu cây trồng hàng đầu trong vùng. Tuy nhiên, trong những năm gần đây, rất nhiều đánh giá cho thấy hệ thống canh tác lúa-ngô là hệ thống canh tác không bền vững và các lợi nhuận của mang lại từ cơ cấu canh tác ở hầu hết các khu vực sản xuất ở vùng đồng bằng sông Hồng của Việt Nam đã và đang giảm dần. Do đó, việc cải thiện cơ cấu canh tác lúa-ngô không chỉ nhằm mục đích tăng năng suất lúa và ngô mà còn nâng cao hiệu quả sử dụng đất, giảm chi phí sản xuất và tăng cường hệ thống canh tác bền vững. Tuy nhiên, để tăng tính bền vững của hệ thống canh tác thì phải liên kết nhiều yếu tố khác nhau. Bài viết này dựa vào các kết quả nghiên cứu của các tác giả khác nhau để đưa ra những giải pháp tích cực làm tăng tính bền vững của hệ thống canh tác lúa-ngô bằng cách áp dụng các phương pháp canh tác hợp lý như giảm sử dụng phân hóa học và các biện pháp canh tác thâm canh như áp dụng phương pháp làm đất tối thiểu
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Landeiro, Reyes Eugenio. "Suitable Locations for Reference Plots Based on the Nitrogen Suffiency Index (NSI)." Thesis, Université d'Ottawa / University of Ottawa, 2014. http://hdl.handle.net/10393/31821.
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Nitrogen (N) is critical to the quantity and quality of agricultural yields. Excess N fertilization is costly, both economically and environmentally (nitrate leaching, eutrophication, greenhouse gas release, soil degradation). This research identifies zones that could substitute the field-long N-rich strips by using spatial analysis of the nitrogen sufficiency index (NSI) and the relation with Apparent Electrical Conductivity (ECa), Elevation, Slope and Soil. NSI calculated from ECa grouped into three classes was capable of minimizing the effects on NDVI. Correlation coefficients (R) between three-class NSI and NSI calculated from the nearest ECA values were very high for all the fields with values between 0.82< R <0.94, with the highest coefficients associated with fields in 2005 and 2007. Meanwhile, three-class NSI coefficients were consistently significant in relation to the NSI reference, with an average of R=0.79 for all the fields. The highest coefficient was detected for 2007, with R=0.89, whereas the lowest values were associated with 2006 (R=0.67). In the case of elevation grouped into four classes, the correlation results were not statistically significant, with overall average values of R<0.70. The maps elaborated from the NSI for ECa grouped into three classes show a high level of accuracy compared to the NSI reference map. The new N-rich zones not only can contribute to mitigating the environmental impact of agricultural practices (reducing 77% of N inputs) but also be an accurate source of data for the analysis of NSI and within-field N variability.
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Lazaro, Edith E. "An Empirical Analysis of Rice Demand in Tanzania." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1417794337.
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Adjognon, Guigonan. "Effeciency and performance of rice marketing chain in Togo." Thesis, McGill University, 2012. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=110675.
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Agricultural markets and their development are viewed as a major tool in alleviating rural poverty in developing countries, especially in Sub-Saharan Africa. In this context, the current study empirically examines the efficiency and performance of rice marketing along with its actors in Togo, a small country located in West Africa. The study analyzes various aspects of Togolese rice market such as: first, the major factors that determine rice marketed surplus among rice farming households in Togo; second, the margins obtained by different stakeholders in the rice value chain; and third, various constraints faced by both rice farmers and traders. The analysis was done using cross sectional data collected from rice producers and traders in Togo during the consumer preferences survey initiated by AfricaRice Center in 2010. The econometric model of determinant of marketed surplus was estimated using both Tobit and Heckman two stage selection model. Overall estimates indicate that production of paddy rice by the household enhances rice farmer's market participation in Togo, whereas transactions costs significantly hinder market participation. These results lend support to policy interventions that are directed toward improved rice production and post harvest management practices at the farm level along with provision of better market infrastructure facilities, in order to reduce transaction costs in the rice markets in Togo. Our results further indicate that the existing market prices for rice affects only farmers' likelihood of participating in the market, and does not affect the quantity of rice supplied to the market. This unresponsiveness of Togolese rice farmers to price signals confirms the existence of considerable imperfections in the rice market in Togo. These results further suggest that price policies will not be effective if the transactions costs and related issues that hinder the Togolese rice market performance are not properly addressed. This is also supported by our detailed analysis on knowing the market power across the markets (5 regions) located in Togo. The concentration ratio obtained in these markets indicates the presence of oligopoly power in the rice marketing chain in Togo. This adds to the existing transaction costs and drives up market margins such that producer receive a smaller share of the dollar paid by the final consumer of rice at the retail level in Togo. The Government of Togo and development agencies should supplement the improvements in rice production by addressing those market imperfections as a prerequisite for the development of the rice in Togo, in order to reduce imports and improve the livelihood of producers.<br>La commercialisation des produits agricoles est l'un des principaux outils de réduction de la pauvreté en milieu rural dans les pays en voies de développement, surtout en Afrique Sub-saharienne. Des lors, la présente étude s'intéresse à l'analyse empirique de l'efficacité et de la performance de la chaine de commercialisation du riz au Togo, un petit pays situé en Afrique de l'Ouest. Les objectifs spécifiques poursuivis incluent l'analyse des déterminants de la participation des producteurs au marché de riz, les marges de commercialisation du riz, ainsi que les principales contraintes auxquelles font face les producteurs et commerçants de riz du Togo. Les analyses sont basées sur des données transversales collectées chez les producteurs et commerçants de riz du Togo, lors d'une enquête sur les préférences des consommateurs de riz, initiée en 2010 par le Centre du Riz pour l'Afrique. Le modèle Tobit et le modèle de sélection de Heckman ont tous deux été utilisés pour estimer les déterminants de la participation au marché des producteurs de riz. Globalement, les résultats indiquent que la production de riz paddy par le ménage affecte positivement la participation des producteurs au marché du riz du Togo, tandis que les couts de transaction y exercent plutôt une influence négative. Ces résultats encouragent donc les interventions politiques qui visent à améliorer la productivité et les stratégies post-récoltes du riz, ainsi que les interventions visant à réduire les couts de transaction dans la chaine de commercialisation du riz au Togo. De plus, les résultats indiquent que le prix du riz n'affecte que la probabilité qu'un producteur participe au marché, mais n'affecte pas la quantité de riz vendu par le producteur. Ceci indique que les producteurs de riz du Togo sont peu réceptifs aux signaux de prix, ce qui confirme l'existence d'importantes imperfections qui méritent d'être corrigées dans le marché du riz au Togo. Le calcul des indices de concentration dans chacune des 5 régions du Togo a révélé la présence d'une oligopolie dans le marché du riz au Togo. Ceci s'ajoute aux couts de transaction existantes et augmente les marges de commercialisation de sorte à ce que les producteurs ne reçoivent qu'une faible part de chaque dollar payé par le consommateur final de riz. Dans le but de réduire les importations de riz au Togo et améliorer les conditions de vies des pauvres paysans, le gouvernement du Togo et les agences de développement devraient corriger ces imperfections dans le marché, en plus d'améliorer les techniques de production du riz au Togo.
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Greeley, M. "Rice in Bangladesh : Postharvest losses, technology and employment." Thesis, University of Sussex, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.373146.
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Mhlanga, Saneliso. "Economic analysis of consumer based attributes for rice in Benin." Thesis, McGill University, 2010. http://digitool.Library.McGill.CA:8881/R/?func=dbin-jump-full&object_id=92360.
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Galli, Fabrizio. "Welfare effects of herbicide-tolerant rice adoption in southern Brazil." Thesis, McGill University, 2012. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=106439.
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The advent of new biological technologies requires significant investment in research and development (R&D). The public sector has historically lead initiatives in agricultural R&D, which due to its public goods nature and high investment risk, the private sector has had limited incentive to participate. However, with the consolidation of intellectual property mechanisms in agriculture – such as Plant Breeders Rights and patents – and the increasing debate on the appropriate rigor they ought to entail, the private sector has accounted for a significant share of the R&D expenditure in the past two decades. Given the ease with which seeds can be reproduced, intellectual property rights (IPRs) and the appropriation of benefits from biological innovations remain controversial. This study investigates the implications of IPRs to the distribution of welfare resulting from the development and introduction of herbicide tolerant rice (known commercially as Clearfield Rice) by a multinational firm (BASF) in southern Brazil. We employ the surplus model by Alston, Norton and Pardey (1995) to estimate the economic surplus accruing to rice producers and the innovator and find that under the current IPR system, under which the Plant Variety Protection Law does not restrain saved seeds' sales, farmers capture the largest share of the economic benefits. We analyze changes to the distribution of welfare under IPR enforcement and find that although both actors would realize larger economic gains, farmers would capture a substantial share of total benefits. Therefore, farmers can gain considerably from IPR-protected biological innovation and at the same time, private investment in research may depend on IPR enforcement that allows sizeable appropriation of economic gains.<br>L'avènement des nouvelles technologies biologiques exige des investissements importants en recherche et développement (R&D). Le secteur public a historiquement dirigé les initiatives de R&D agricole, qui en raison de son caractère de bien public caracteristique comme un bien public et le risque d'investissement élevé, le secteur privé a eu peu d'incitation à participer. Néanmoins, avec l'affermissement des mécanismes de la propriété intellectuelle dans l'agriculture – tels que Plant Breeders Rights et des brevets – ainsi que le débat croissant sur la rigueur qu'elles possèdent, le secteur privé a été responsable pour une portion significative des dépenses en R&D durant les deux dernières décennies. Étant donné la facilité avec laquelle les graines peuvent être reproduites, les droits de la propriété intellectuelle (DPIs) et l'appropriation des avantages des innovations biologiques est toujours un sujet à controverse. Cette étude porte sur les implications des DPIs sur la distribution de bien être à la suite du développement et introduction d'un espèce de riz tolérant aux herbicides (commercialisé sous le nom Clearfield Rice) par une firme multinational (BASF) dans le sud du Brésil. Nous utilisons le model excédentaire par Alston, Norton and Pardey (1995) pour estimer le surplus économique revenant aux producteurs de riz et à l'innovateur. Nous avons trouvé qu'avec le system des DPI actuel, sous lequel la loi de protection des variétés végétales ne limite pas la vente des graines sauvegardées, ce sont les producteurs qui reçoivent la plus grande partie des avantages économiques. Nous analysons les changements à la distribution de bien être dans l'application des DPIs et nous trouvons que même si les innovateurs et les producteurs réalisent des bénéfices économiques, ce sont les producteurs qui recueillent une portion significative des avantages totaux. Par conséquent, les producteurs peuvent bénéficier de l'innovation biologique protégé par les DPIs. En même temps, l'investissement privé en recherche peut dépendre sur l'application des DPIs qui permettent l'appropriation significative des gains économiques.
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Demirciler, Volkan. "Agricultural Practices And Countryside In Classical Greece." Master's thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/3/12608185/index.pdf.
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The subject of this study is the rural settlements in Classical Greece. There is no doubt that there were various factors determined the ancient settlement patterns in Greek countryside. Geographical conditions, socio-economic and political structures can be regarded as major significant factors behind the settlement practices of ancient societies. In this study the relationships between agricultural system and rural settlements of Classical Greece will be examined.
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Truex-Powell, Elizabeth. "Econometric Analysis of Agricultural Policy and Practices." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1408923154.
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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.
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Kuri, Subrato Kumar. "Exploring Teaching Practices of the Agricultural Education at Bangladesh Agricultural University (BAU)." Diss., Virginia Tech, 2021. http://hdl.handle.net/10919/104075.
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The purpose of this study was to understand the teaching practices of the Agriculture Faculty at Bangladesh Agricultural University (BAU). This study is at the intersection of the critical assessment and examination of assumption and exploring options and plans stages of transformative learning theory (Mezirow, 2000) and the environment factor of Astin's I-E-O model. Previous studies showed that tertiary education of Bangladesh fails to develop critical thinking abilities among the students. Higher order teaching practices help to develop critical thinking abilities among the students. Thus, it is important to explore the level of teaching practices at the Agriculture Faculty of BAU to understand how it supports critical thinking abilities among the students. Graduates being able to use critical thinking skills to solve agricultural issues will increase total food production and reduce national poverty. This study was an instrumental single case study. Faculty of Agriculture of BAU was the unit of analysis for this study. The findings of this study were only generalizable to the Agriculture Faculty at BAU and only relevant for Summer 2020. The phenomenon of this study was teaching practices at the Agriculture Faculty of BAU. Data sources included a census survey of active faculty members and content analysis of course syllabi. Findings from this study suggested that both teaching methods and course learning outcomes of the courses of the Agriculture Faculty at BAU were related the lower order of Revised Bloom's Taxonomy (RevBT). Moreover, faculty members from biological science and engineering used more teaching practices from evaluating level of RevBT than social science disciplines. Evaluating level is considered as higher level of RevBT. Male faculty members also used more teaching practices related to analyzing level than female faculty members. Analyzing level is also considered as higher level of RevBT. Faculty members identified that they have lack of training, standard teaching resources to use higher order teaching practices. Moreover, they also said that students of the Agriculture Faculty at BAU are more interested in job preparation than classroom education. However, faculty members also felt that higher order teaching practices can improve the creativity and critical thinking abilities for students and brings enthusiasms in teaching. Faculty members recommended that BAU revise its curriculum, syllabi, and assessment strategies to create higher order teaching practices in classrooms. As a result of this study, there is opportunity for faculty to increase their use of higher order teaching practices and develop course outcomes that support higher order learning. In addition, the university should revise their existing curricula and assessment techniques and give more freedom to the faculty members to choose their teaching and assessment methods. Finally, training should be organized to support higher order teaching by female faculty members.<br>Doctor of Philosophy<br>The purpose of this case study was to understand the teaching practices of the Agriculture Faculty at Bangladesh Agricultural University (BAU). Conceptually, this study was coupled up with transformative learning theory (Mezirow, 2000) and the Astin's I-E-O model. The unit of analysis of this study was the educational environment provided by Agriculture faculty of BAU that offers a single under-graduate degree program called B.Sc. Ag. (Hons.). A structured survey questionnaire was used to collect data from the faculty members of the Agriculture Faculty of BAU based on Revised Bloom's Taxonomy (RevBT). Additionally, all course syllabi were analyzed to identify the level of intended teaching practices based on RevBT. RevBT is the benchmark standard to evaluate the cognitive orders of the teaching-learning process, curriculum planning, instruction, and test tasks. Findings from this study suggested that faculty members slightly more preferred teaching practices from the lower levels of RevBT for the classroom teaching at BAU. Findings also suggested that teaching practices connected to the higher cognitive levels of RevBT were significantly varied based on academic disciplines and gender of the faculty members. Faculty members mentioned that lack of students' interest in classroom lessons, the rigid curricula and existing examination system of BAU, large numbers of students in classes, and lack of training of the faculty members are the main limiting factors for them to use higher order teaching practices in classrooms. However, faculty members also wanted to use the higher order teaching practices in classrooms as higher order teaching practices enhances students' creativity, problem solving skills, and critical thinking skills. Faculty members suggested to update course curricula, syllabi, and the exam system to support higher-order teaching practices at BAU. Findings from the course syllabi analysis supported that most of the action verbs of course learning outcomes of the course syllabi were connected to the lower cognitive levels of RevBT. As a result of this study, there is opportunity for faculty to increase their use of higher order teaching practices and develop courses that support higher order learning. In addition, the university should revise their existing curricula and assessment techniques and give more freedom to the faculty members to choose their teaching and assessment methods. Finally, training should be organized to support higher order teaching by female faculty members.
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Nagarajan, Geetha. "Informal credit markets in Philippine rice growing areas." Connect to resource, 1992. http://rave.ohiolink.edu/etdc/view.cgi?acc%5Fnum=osu1249498212.
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Abaidoo, Samuel. "Human-nature interaction and the modern agricultural regime, agricultural practices and environmental ethics." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq24063.pdf.
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Marker, John R. "Retirement planning practices and strategies for agricultural producers." Thesis, Virginia Tech, 1995. http://hdl.handle.net/10919/45054.
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This study examines the current retirement strategies of agricultural producers, determines farmers’ levels of investment and financial planning knowledge, and makes recommendations for the construction of a computer-based expert system to assist producers in developing retirement plans and strategies. The first two objectives are accomplished through the analysis of 336 self-administered and mailed surveys from producers in Iowa, Kansas, Nebraska, Virginia, and Washington. The third objective is completed utilizing study results, information provided by individuals knowledgeable m personal finance, and literature dealing with personal financial management.
Seventy percent of the survey respondents invest in non-farm assets. Farmers who do not invest off the farm cite a desire to pay down debt, little or no funds available, tax savings, and liquidity as their leading reasons not to invest off the farm, while those who do invest off-farm list tax benefits and diversification as their leading motivators. Respondents began retirement saving early and one-third of them wanted to begin withdrawing from the farming operation by the age of 60.
Seventy-eight percent of the respondents with non-farm jobs invest in assets off the farm (p < .05). Producers with the highest levels of formal education are more likely to invest off the farm than the less educated producers (p < .005). Farmers with less formal education tend to delay investing for retirement until later in life (p < .001).<br>Master of Science
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Majumder, Bhakti. "The performance of agricultural institutions in disseminating new technologies : a case study of the modern rice variety BR32 in Bangladesh." Thesis, University of Aberdeen, 2003. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=188101.
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Despite substantial public expenditure from domestic and international sources on free-to-user agricultural extension services in Bangladesh, there is a lag between the availability and application of seed technologies. Besides the slow pace of diffusion of newly generated modern varieties (MVs), there exist wide gaps between potential and achieved yields at the farm level. This study aims to assess the performance of Bangladeshi research and extension (R&E) institutions in disseminating new rice MVs to end-users, and to identify factors affecting farm-level diffusion of the disseminated MVs. The study also examines the relationship between users’ technological knowledge and yields in the case of a new T. <i>Aman</i> season rice MV, BR32. The results suggest that the efficiency of the extension services was associated with the allocation of project funds between farm-level dissemination activities and overheads costs, and with the timing of project implementation. The presence of many divisions and administrative levels in the technology transfer system appears to be responsible for high overheads, while farm-level diffusion of BR32 was delayed for 4 years after its release due to the late start of project-funded dissemination activities. The rate of MV diffusion was restricted by seed scarcity, deficiencies in technical knowledge transfer, and some undesirable technology attributes. The reasons for the seed crisis were: i) the low amounts supplied by the public parastatal agency whose capacity was found to be under-utilized, ii) the lack of effective distributional channels for farmer-produced seeds, iii) the lack of farmer access to information about seed sources and demonstration sites, and iv) the low involvement of NGOs and the private sector. The average and marginal costs of BR32 dissemination would have been much lower if seed and technical knowledge could have been delivered more according to farmers’ demand.
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Kinnman, Susanna. "Managing agricultural export instability : the case of rice and coffee in Vietnam /." Lund, 2004. http://www.gbv.de/dms/zbw/49356778X.pdf.
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Tantisantiwong, Nongnuch. "The relationships between agricultural spot and futures markets : the case of rice." Thesis, University of York, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.421594.
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Samad, Madar. "Persistent poverty among rice farmers in the major irrigated colonization schemes of Sri Lanka." Thesis, Imperial College London, 1990. http://hdl.handle.net/10044/1/46534.
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Chunsanit, Suchada. "Pesticide use and training needs of Thai rice farmers : a case study." Thesis, Imperial College London, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.248668.
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Douthwaite, Boru. "Equipment evolution : case studies of changes in rice postharvest technologies in the Philippines and Vietnam." Thesis, University of Reading, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.287380.
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Parker, Geoff. "Modeling agricultural best management practices in the South Nation watershed." Thesis, University of Ottawa (Canada), 2004. http://hdl.handle.net/10393/26740.
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The South Nation watershed consists of an area of roughly 3900 km2 in Eastern Ontario which drains into the South Nation River. The South Nation River in turn drains into the Ottawa River at the watershed outlet.
The work presented here included the use of the continuous-simulation Annualized Agricultural Non Point Source (AnnAGNPS) 5.0 dynamic pollutant loading model, which was developed by the U.S. Department of Agriculture (USDA).
In-stream water chemistry was also an important element of a meaningful analysis. The dynamic water-quality model CE-QUAL-RIV1 was selected due to its riverine nature, which is closely linked with the AnnAGNPS concept of a channel network.
Utilities were developed to enhance the input and output capabilities of both codes. The linked models were then calibrated to the available data, and a case matrix focused on predicting feasibility of best management practices (BMPs) within the context of climate change was constructed and simulated. The calibration process was done manually at first, based on the results of a sensitivity analysis conducted on the AnnAGNPS package as part of the work. Subsequently, the use of an automatic genetic-algorithm based approach (also developed as part of this work) was explored, which yielded an improvement in the calibrated model and was therefore used as a base case of the model.
The case matrix examined 4 individual BMPs, along with 4 combined BMP scenarios. (Abstract shortened by UMI.)
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Dorner, Sarah M. "Evaluating best management practices for agricultural watersheds using probabilistic models." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0020/MQ55669.pdf.
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Moliner, Estopiñán Cristina Elia. "Valorisation of Agricultural Residues." Doctoral thesis, Universitat Politècnica de València, 2016. http://hdl.handle.net/10251/68495.
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[EN] The aim of the present PhD Thesis is to define, develop and evaluate a methodology for an improved and more sustainable management of waste, in particular agricultural residues, turning them into a new source of energy and into added value products. Particular attention is paid to the use of rice straw as an energy vector and as a precursor of silica-based compounds.
The recovery of energy was carried through the gasification of biomass within a Spouted Bed Reactor. An initial definition of the main physico-chemical and thermal properties of the feed was performed. The design and operational parameters of the reactor were set according to the characteristics of the biomass. Due to the particular configuration of the reactor, its fluid dynamic properties were analysed in detail in a lab scale unit. The conditions of stability of the reactor and the prevention of segregation phenomena were studied. A scaled-up unit was used for the evaluation of the reactions of gasification of the different residues. The behaviour of the system was modelled at both fluid dynamic and thermo-chemical levels with the aid of different commercial softwares. Finally, a material valorisation was performed. The extraction of silica from the ashes resulting from the thermo-chemical process was studied. Their application as adsorbent materials for the removal of nitrates in water was discussed.<br>[ES] El objetivo de la presente tesis doctoral es definir, desarrollar y evaluar una metodología eficiente de gestión de residuos, en particular agrícolas, para convertirlos en una nueva fuente de energía y en productos de valor añadido. Se estudia con especial atención el uso de la paja de arroz como vector energético y como precursor de productos basados en sílice.
Las reacciones de recuperación energética se han llevado a cabo a través de la gasificación de la biomasa en reactores de tipo Spouted Bed. Para ello, se han definido las propiedades físico-químicas y de comportamiento térmico de los residuos estudiados. Los parámetros de diseño y operación del reactor han sido definidos de acuerdo a las características del material tratado. Debido a la particular configuración del reactor, las propiedades fluido- dinámicas del sistema se han analizado en detalle en una unidad a escala de laboratorio. En ella se han estudiado las condiciones de estabilidad del reactor y aquellas que previenen los procesos de segregación. Se ha utilizado una unidad escalada a dimensiones de planta piloto para llevar a cabo las pruebas de gasificacion de los residuos. El comportamiento del reactor se ha modelado tanto a nivel fluido dinámico como a nivel térmico mediante el uso de diversos códigos comerciales de simulación. Finalmente, se ha realizado una valorización material basada en la extracción de sílice de las cenizas resultantes del proceso de valorización térmica. Por último, se han realizado pruebas preliminares de la posible aplicación de dicha sílice en procesos de adsorción de nitratos presentes en agua.<br>[CAT] L'objectiu de la present tesi doctoral és definir, desenvolupar i evaluar una metodologia eficient de gestió de residus, en particular agrícoles, per convertir-los en una nova font d'energia i en productes de valor afegit. S'estudia amb especial atenció l'ús de la palla d'arròs com a vector energètic i com a precursor de productes basats en sílice.
Les reaccions de recuperació energètica s'han dut a terme a través de la gasificació de la biomassa en uns reactors de tipus Spouted Bed . Per això, s'han definit les propietats físico-químiques i de comportament tèrmic dels residus estudiats. Els paràmetres de disseny i operació del reactor han estat definits d'acord a les característiques del material tractat. A causa de la particular configuració del reactor, les propietats fluid - dinàmiques del sistema s'han analitzat amb detall en una unitat a escala de laboratori. S'hi han estudiat les condicions d'estabilitat del reactor i aquelles que prevenen els processos de segregació. S'ha utilitzat una unitat escalada a dimensions de planta pilot per dur a terme les proves de gasificació dels residus. El comportament del reactor s'ha modelat tant a nivell fluid dinàmic com a nivell tèrmic mitjançant l'ús de diversos codis comercials de simulació. Finalment, s'ha realitzat una valorització material basada en l'extracció de sílice de les cendres resultants del procés de valorització tèrmica. Per ùltim, s'han realitzat proves preliminars de la possible aplicació d'aquesta sílice en processos d'adsorció de nitrats presents en aigua.<br>Moliner Estopiñán, CE. (2016). Valorisation of Agricultural Residues [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/68495<br>TESIS<br>Premiado
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Ku, Tsun-Yao. "Educational needs in farm management skills of Taiwan's core rice farmers /." free to MU campus, to others for purchase, 2002. http://wwwlib.umi.com/cr/mo/fullcit?p3074418.
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Rodriguez, Baide Joysee Mariela Molnar Joseph J. "Barriers to adoption of sustainable agricultural practices in the South change agents perspectives /." Auburn, Ala., 2005. http://repo.lib.auburn.edu/2005%20Fall/Thesis/RODRIGUEZ_BAIDE_18.pdf.
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Ahmed, Allam El Nour Osman. "Internal technology transfer in the Sudan : the dichotomy between agricultural research and agricultural practice." Thesis, Edinburgh Napier University, 2000. http://researchrepository.napier.ac.uk/Output/1051806.
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Sudan is the largest country in Africa and boasts the largest farm in the world. Sudan is a predominately agricultural economy; agriculture employs more than eighty percent of the country's labour force and its industry. The national agricultural research institutions are charged with the key responsibility of implementing sustainable agricultural growth and development in Sudan. By adoption of demonstrable benefit farms, the research institutions view their contribution as providing improvements to traditional Sudanese practices rather than focusing on developing new techniques. Any research institution must have methodsof improving farming practices and the pertinent test of their relevance is improved management practices. Crop productivity is extremely low and does not exceed thirty percent of the level attained in research or demonstration fields; the difficult economic position of the country has adversely affected the activities of the agricultural research institutions; technology generation is greatly hampered; the extension service is fragmented and its efforts are conned to a small number of farmers; the research institutions are weakened due to frequent staff turnover, lack of continuity in the research agenda and inadequacies in management and hence their impact is limited. The main purpose of this study is to critically evaluate the implementation capacity constraints which exist in formal agricultural research and the impact this has on thedevelopment of the agricultural sector of the Sudanese economy. The study also attempts to provide a better understanding of the relationships between low productivity in Sudan and the determinants of this. The data for this research were obtained from a field survey carried out in 1999. In the survey, a total of 120 farmers from the Gezira Scheme, 84 researchers from the Agricultural Research Corporation, 33 academic staff from the Gezira University as well as extensionists from the Central State were successfully interviewed. The research explores various aspects of the internal technology transfer system and the productivity gap in traditional agriculture. A critical review of the theoretical and empirical literature on technology transfer has been conducted in the study. It is obvious that economic analysis alone will not provide a satisfactory solution to the type of problems investigated in the study as these issues and problems also have political and socio-cultural dimensions. Therefore, the proposed solutions simply seek to change the behaviours of both individuals and institutions. To do this it is necessary to recognise all the dimensions of the technology transfer problem. This study provides insights into the influence of demographic, socio-economic, cultural, technical and decision-making factors on technology transfer and productivity in Sudan. The thesis concludes with discussion of key policy implications and areas for further research. The findings of this research should assist in guiding planners and policy-makers in improving the internal technology transfer system and perhaps in enabling agricultural productivity to improve in the Sudan.
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Brooks, Cecilia, Tommy Phillips, and Rashmi Kunwar. "Exploration of Agricultural Literacy and Importance of Agricultural Practices among College Students at a Liberal Arts University." Digital Commons @ East Tennessee State University, 2020. https://dc.etsu.edu/secfr-conf/2020/schedule/60.
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The role of agriculture in the economy and society remains relevant as the industry provides 11% of employment and affordable access to healthy food which promote health and wellbeing. However, without adequate agricultural literacy, individuals may not be able to make safe and healthy food choices. To explore the level of agricultural literacy of college students, a 43-item questionnaire was developed and will be administered at a Liberal Arts University in the Southeastern United States. The aim of the study is to determine agricultural literacy scores and the importance of agricultural practices among college students who are not and will not be enrolled in agricultural courses and who do not plan to pursue a career in agriculture. Data collected will be examined to determine whether agricultural literacy is related to the importance of agricultural practices and whether relationships between demographic characteristics and agricultural literacy scores are present
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Craiovan, Emilia. "Evaluation of agricultural beneficial management practices: Cattle access restriction to surface waters subsurface tile drainage management." Thesis, University of Ottawa (Canada), 2009. http://hdl.handle.net/10393/28055.
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The aim of this study was to investigate two potential beneficial management practices that will reduce the impact of fecal and fertilizers contamination on the environment. The study was conducted in Eastern Ontario on typical small scale agricultural practices.
The first part evaluates the impact of a conventional pasture system and an excluding pasture system on surface water quality. The three year study compared water quality endpoints such as: indicator bacteria, pathogens, parasites and nutrients between treatments. Microbial source tracking indicated that livestock was the main source of fecal contamination in the stream. Greater bacteria and nutrient loads were observed in the unrestricted pasture system than the excluding pasture. Moreover, parasite and indicator bacteria concentrations increased after cattle introduction in both systems.
The second part compares nitrogen mass balance between managed and conventional subsurface tile drainage. Over two years, nitrogen loads in groundwater, in tile flow, in plants, in soil and denitrification were compared between treatments. Nitrogen was mostly removed from managed tile drainage fields through plant uptake. Compared to nitrogen plant uptake, denitrification, the second greatest nitrogen removing process was 10 times smaller. The denitrification was greater in the unmanaged tile drainage fields. Generally, managed subsurface tile drainage reduces nitrogen mass loads to surface waters and increases nitrogen uptake by plant, which resulted in greater yields.
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Lingard, J. "An economic analysis of agricultural mechanisation with particular reference to rice farms in the Philippines and Indonesia." Thesis, University of Newcastle Upon Tyne, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.374769.
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Majiwa, Eucabeth Bosibori Opande. "Productivity and efficiency of the agricultural sector : Africa with a special focus on rice farming and processing in Kenya." Thesis, Queensland University of Technology, 2017. https://eprints.qut.edu.au/105586/1/Eucabeth%20Bosibori%20Opande_Majiwa_Thesis.pdf.
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Food security remains a serious concern in Africa because of famine, drought and low yields. To address this concern, the thesis quantifies sources of productivity and efficiency; and provides policy recommendations needed to raise African agricultural productivity. The results indicate that there is room for improvement in lifting African agricultural productivity through appropriate policy implementation. These include R&D spending, schooling, and lowering of HIV prevalence rates. The thesis also evaluates the efficiency of Kenyan rice farming and processing as a special focus. The results suggest differences in rice farming efficiency levels across regions largely attributed to age, gender and technology. For rice processing, farmers can improve their efficiency with better knowledge of servicing and maintenance of rice processing machines.
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Ababio-Twi, Faith S. "Funding Strategies for Smallholder Rice Farmers in Afadzato South District, Ghana." ScholarWorks, 2019. https://scholarworks.waldenu.edu/dissertations/7849.
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Agriculture revenue contributions to Ghana's gross domestic product have declined because of limited farm funding, which has constrained some smallholder rice farmers access credit to acquire necessary inputs, and to secure a stable market for their harvests. The purpose of this qualitative multiple case study was to explore successful strategies some smallholder rice farmers in the Afadzato South District of Ghana used in obtaining farm funding. Data collection included semistructured, face-to-face interviews with 9 smallholder rice farmers who successfully obtained farm funding. Previous research, reports, and policies of the Ghana Ministry of Food and Agriculture served as additional data collection sources. Data were analyzed using thematic analysis and resulted in three major themes: the smallholder farmer's strategy of belonging to cooperative association membership, the smallholder farmer's strategy for satisfying lender collateral requirements, and smallholder farmer's strategies for developing a repayment rating history. The implications for positive social change include the potential to guide the smallholder farmers to successful strategies to access farm funding for their farming activities and increase their farm sizes. The increase in farm sizes may result in more rice production that can help mitigate hunger and reduce poverty in the Afadzato South District of Ghana.
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Gedikoglu, Haluk McCann Laura. "Adoption of nutrient management practices." Diss., Columbia, Mo. : University of Missouri--Columbia, 2008. http://hdl.handle.net/10355/6614.
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Title from PDF of title page (University of Missouri--Columbia, viewed on March 17, 2010). The entire thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file; a non-technical public abstract appears in the public.pdf file. Thesis advisor: Dr. Laura McCann. Vita. Includes bibliographical references.
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McDonough, Peter. "THE EFFECTS OF FOOD AID ON AGRICULTURAL PRACTICES IN JUMLA, NEPAL." The Ohio State University, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=osu1406675214.
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Prasara-A, Jittima, and s3126806@student rmit edu au. "Comparative life cycle assessment of rice husk utilization in Thailand." RMIT University. Global Studies, Social Science and Planning, 2010. http://adt.lib.rmit.edu.au/adt/public/adt-VIT20100304.122826.
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Thailand is one of the largest rice producing nations in the world. Moreover, there is a trend for Thai rice exports to increase. This could imply that if the trend continues, there will be an increased quantity of rice husk in the future. Rice husk is a co-product of rice products generated in the rice milling process, accounting for about 23 percent of the total paddy weight. To make use of this large quantity of rice husk, the husk has traditionally been used as an energy source in the rice mills themselves. More recently, the Thai government has promoted the use of biomass to substitute for fossil fuel consumption and to reduce the environmental impacts caused by using fossil fuels. Therefore, rice husk, which is one of the main sources of biomass in Thailand, has already been used on a commercial scale. However, the environmental impacts associated with different rice husk applications have not yet been widely investigated in the Thai context. While there is a need to find ways of dealing with rice husk disposal, it is also important to ensure that this husk is used in ways that harm the environment least. This research aims to identify the most environmentally friendly use of rice husk for Thailand. To achieve this, the research is divided into three main stages; identification of main current and potential uses of rice husk in Thailand; data collection; and data analysis using Life Cycle Analysis approach. A range of methods such as literature review, questionnaires with rice mill owners, and interviews with industry personnel, were used to help in identifying the current and potential uses of rice husk. The major current and potential rice husk uses chosen to be examined in this research are those uses of rice husk in electricity generation, in cement manufacture and in cellulosic ethanol production. The second stage is to collect detailed data about the processes of the selected rice husk uses to be examined. This was undertaken by literature review, questionnaires and interviews with involved industry personnel. The last stage is to analyse the data collated. Life Cycle Assessment (LCA) approach and the L CA software package SimaPro (version 7.1.6) were used to assess the environmental impacts of the selected rice husk uses. Results from the LCA are reviewed in the context of critical policy issues, including the Thai government biomass policies; the capacity of the production process of rice husk use options; and the infrastructure availability and practicality of the rice husk use options. Based on the goal and scope of the study, the data available for this study and the review of the issues just mentioned, it is concluded that, in the short term, the most practical environmentally friendly use of rice husk across the three uses investigated is the use of rice husk in electricity generation. However, with expected oil shortages in the future, rice husk should also be considered for use in cellulosic ethanol production, as this option helps to save some amount of petrol.
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Horna, Rodríguez Julia Daniela. "Evaluating private participation in agricultural extension : the case of rice in Nigeria and Benin /." Tönning : Der Andere Verlag, 2006. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=015736389&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.
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Ankrom, Sharon J. "Perceptions of ethical practices in youth livestock shows." Morgantown, W. Va. : [West Virginia University Libraries], 2009. http://hdl.handle.net/10450/10519.
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Thesis (M.S.)--West Virginia University, 2009.<br>Title from document title page. Document formatted into pages; contains vi, 122 p. : col. ill. Vita. Includes abstract. Includes bibliographical references (p. 51-53).
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Geng, Yang GENG. "Understanding Current On-Farm Storage Systems and Safety Practices of Ohio Cash Grain Operators." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1461298325.
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Gebremariam, Gebrelibanos [Verfasser]. "Sustainable Agricultural Practices (SAPs) in Northern Ghana : impacts on welfare, environmental reliance, and agricultural land expansion / Gebrelibanos Gebremariam." Bonn : Universitäts- und Landesbibliothek Bonn, 2018. http://d-nb.info/1170872298/34.
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Jobling, Andrew. "Agrarian change on Peru's northern coast in the late twentieth century : a case study of rice farming in Ferranafe." Thesis, University of Liverpool, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.250305.
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Wickramasinghe, Dharmakeerthi Bandara. "The solubility of rice straw silica and its use as a silicon source in paddy cultivation." Thesis, University of Reading, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.386976.
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Nanson, Weldon Duane. "Red rice (Oryza sativa L.) ecotype tolerance to herbicides and winter weed management practices." Thesis, [College Station, Tex. : Texas A&M University, 2007. http://hdl.handle.net/1969.1/ETD-TAMU-1411.
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Woodrum, William John. "Leadership Practices of West Virginia University Extension Agents Working the 4-H Youth Development Program." The Ohio State University, 2001. http://rave.ohiolink.edu/etdc/view?acc_num=osu1409146718.
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Amornvivat, Sutapa 1974. "Impact of on-farm water storage for increasing agricultural productivity of rice farms in Thailand." Thesis, Massachusetts Institute of Technology, 2002. http://hdl.handle.net/1721.1/84308.
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Rapu, Samuel Chukwueyem. "Evaluating the Impact of Policies on Production Efficiency of Nigeria's Rice Economy." ScholarWorks, 2016. https://scholarworks.waldenu.edu/dissertations/2423.
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Nigeria, like all other rice consuming nations, has experienced a surge in domestic demand for rice since 1970. However, local rice production has not been sufficient to meet local demand, leading to this demand continually being filled by imports. The Federal Government of Nigeria has initiated subsidies programs intended to improve Nigerian rice farmers' technical and cost efficiency levels. This quantitative study evaluated the impact of these policies on the technical and cost efficiency levels of paddy rice farm households in Nigeria. Farrell's (1957) efficiency theory and production theory served as the theoretical frameworks. Data were collected from a cross-section of 300 paddy rice farmers drawn from 3 states in Nigeria. The study used 2 estimation techniques: parametric technique (SF) and the non-parametric technique (DEA). The results showed that paddy rice production in Nigeria was still profitable but low and the estimated average technical and cost efficiency levels from the DEA approach were 0.721 and 0.295, respectively. Evidence suggests that the formulation and implementation of subsidy programs on farm inputs were relevant in the variations of technical and cost efficiency levels across the rice farm households. The study findings support the continuity of the subsidy policies to encourage increased rice production; they also suggest that governments should address the issues of post-harvest losses, degrading irrigation facilities, and ineffective rural development policies. The positive social change implications of this research include providing information to inform government policy changes designed to more effectively address rice importation and pricing, positively impacting the standard of living for rural farmers and communities in Nigeria.
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Burr, Shawn E. "An assessment of seven methods to measure nitrogen leaching under agricultural practices." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ56307.pdf.
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Simpson, Ian Charles. "The impact of agricultural practices on the aquatic invertebrate populations of ricefields." Thesis, Cardiff University, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.274018.
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