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Dissertations / Theses on the topic 'Cropping systems'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Dirvi, Gulzar Ahmad. "Wheat/beans interactions in mixed cropping systems." Thesis, University of Liverpool, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.264278.

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2

Chim, Bee Khim. "Alternative and Improved Cropping Systems for Virginia." Diss., Virginia Tech, 2016. http://hdl.handle.net/10919/79721.

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Feed grain consumption in Virginia and the mid-Atlantic region is more than double the total production. Producing more feed grains in this region could generate more profit for grain growers and lower costs for end-users. Increased feed grain production in this region will necessitate improved corn (Zea mays L.) management techniques and adoption of alternative feed grains such as grain sorghum (Sorghum bicolor L.). In order to achieve our overall objective of increased corn and grain sorghum production in the region, experiments were conducted to assess tools with the ability to increase

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3

Swoish, Michael Joseph. "Technological Innovations for Mid-Atlantic Cropping Systems." Diss., Virginia Tech, 2020. http://hdl.handle.net/10919/104449.

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Greater projected demand for food, fuel, and fiber will require substantial increases in global agricultural production over the next three decades. Climate change is also forecasted to make weather events more extreme and variable. Efficiency will become more important as demand for food products increases and the availability of fertilizer and land decreases. Technology may be of paramount importance for pushing the boundaries of production while remaining sustainable for generations to come. The first chapter of this dissertation investigated the importance of rate and timing of the plant g

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4

Rezaei, Rashti Mehran. "Nitrous Oxide Emissions from Vegetable Cropping Systems." Thesis, Griffith University, 2015. http://hdl.handle.net/10072/365552.

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Agricultural manipulation of the soil nitrogen (N) cycle has caused a significant increase in nitrous oxide (N2O) emissions during the past five decades. Nitrous oxide is one of the major greenhouse gases with potent and long-lasting global warming effects [298 times higher than carbon dioxide (CO2) over a time period of 100 years]. The major biogenic processes responsible for N2O production in agricultural soils are identified as nitrification which is the oxidation of ammonium (NH4+) to nitrite (NO2-) and nitrate (NO3-) and denitrification that is the anaerobic reduction of NO2- and NO3- to

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5

Li, Yuxia. "Traffic and tillage effects on dryland cropping systems in north-east Australia /." [St. Lucia, Qld.], 2001. http://www.library.uq.edu.au/pdfserve.php?image=thesisabs/absthe16335.pdf.

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6

Bosshard, Christina. "Nitrogen dynamics in conventional and organic cropping systems /." Zürich : ETH, 2007. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=17329.

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7

Blade, Stanford F. (Stanford Fred). "Evaluation of cowpea lines in Nigerian cropping systems." Thesis, McGill University, 1991. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=70310.

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The primary hypothesis of this research was that improved cowpea genotypes (selected under sole crop) could yield well in several Nigerian cropping systems, and that there were cowpea characteristics that improved overall system productivity. Cowpea lines were identified which were high yielding and stable in several management systems. Practices such as not applying insecticide and intercropping both reduced cowpea grain yield significantly. Land equivalent ratios were greater than one for all tested intercrop systems: cassava-cowpea (1.21-2.35), maize-cowpea (1.31-4.23), maize-cassava-cowpea

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8

Heggenstaller, Andrew Howard. "Productivity and nutrient cycling in bioenergy cropping systems." [Ames, Iowa : Iowa State University], 2008.

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9

Halbach, Rachel Beverly. "Weed growth in conventional and low-input cropping systems." [Ames, Iowa : Iowa State University], 2010. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1475925.

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10

Vongsaroj, Prasan. "Agronomy and weed control for rice-soybean cropping systems." Thesis, Imperial College London, 1990. http://hdl.handle.net/10044/1/46596.

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11

Asada, Haruhisa. "Climate and Rice Cropping Systems in the Brahmaputra Basin." 京都大学 (Kyoto University), 2011. http://hdl.handle.net/2433/147382.

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12

Chiwindo, Privata Simon. "Economics of Mono-Cropping and Agroforestry Systems in Tanzania." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1469175239.

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13

Parenti, Andrea <1988&gt. "Modelling new sustainable cropping systems for advanced biofuel production." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amsdottorato.unibo.it/9298/1/PhD%20Thesis%20Andrea%20Parenti.pdf.

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Through the re-use of empirical functions and new model development, this study aims at contributing to the development of advanced biofuels in Europe. Four lignocellulosic crops were selected and tested in stand-alone (sunn hemp – Crotalaria juncea L.) and rotation system (sunn hemp, biomass sorghum - Sorghum bicolor x Sorghum sudangrass, kenaf - Hibiscus cannabinus L. and industrial hemp - Cannabis sativa L.) in different European environments. The first Chapter deals with a new model development (SunnGro) to reproduce sunn hemp, an interesting summer crop for advanced biofuels in Europe; in

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14

Kanwar, John. "Smart cropping tools with help of machine learning." Thesis, Luleå tekniska universitet, Institutionen för system- och rymdteknik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-74827.

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Machine learning has been around for a long time, the applications range from a big variety of different subjects, everything from self driving cars to data mining. When a person takes a picture with its mobile phone it easily happens that the photo is a little bit crooked. It does also happen that people takes spontaneous photos with help of their phones, which can result in something irrelevant ending up in the corner of the image. This thesis combines machine learning with photo editing tools. It will explore the possibilities how machine learning can be used to automatically crop images in

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15

Lacroix, Mireille 1958. "Cropping to suppress yellow nutsedge (Cyperus esculentus L.)." Thesis, McGill University, 1986. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=65450.

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16

ARAYAPHONG, SUPISRA. "Cost – Benefit Analysis of Different Rice Cropping systems in Thailand." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-180974.

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System of Rice Intensification (SRI) has been introduced and practiced throughout Thailand. However, the conventional transplanting system is well-accepted among Thai farmers over the country. This paper quantifies and compares costs and benefits of SRI and the conventional system of rice cultivation in Thailand to find the best system for a farmer, the environment and a society. The scope of this paper includes a farmer’s profit, the environmental damages and a society’s net benefits categorized in clay soil and sandy loam conditions. The farmer’s profit consists of a production cost and inco

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17

Rick, Terry Lynn. "Phosphorus fertility in Northern Great Plains dryland organic cropping systems." Thesis, Montana State University, 2009. http://etd.lib.montana.edu/etd/2008/rick/RickT1208.pdf.

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Maintaining phosphorus (P) fertility in northern Great Plains (NGP) dryland organic cropping systems is a challenge due to high pH, calcareous soils that limit P bioavailability. Organic P fertilizers, including rock phosphate (RP) and bone meal (BM) are sparingly soluble in higher pH soils. Certain crops species have demonstrated an ability to mobilize sparingly soluble P sources. Objectives of this project were to 1) evaluate the effect of green manure (GM) crops and organic P fertilizers on the P nutrition of subsequent crops, and 2) investigate P fertility differences between organic and n

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18

Kaluli, J. Wambua. "Water table management and cropping systems for intensive corn production." Thesis, McGill University, 1996. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=40155.

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The use of agricultural chemicals, such as nitrogen fertilizers in corn production, often results in water pollution. This research, comprising three parts, was designed to investigate the effects of nitrogen fertilizer application rates, water table management, and corn cropping systems on drainage water quality. The first part was a field study, to investigate the impact of two cropping systems and water table management on nitrate loss through tile drainage. The considered water table treatments were free drainage, and subirrigation with target water table depths at 0.5 m or 0.75 M below th

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19

Hossain, Mohamed Faruque. "The nitrogen economy of rice based cropping systems in Bangladesh." Thesis, Imperial College London, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.248241.

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20

Miller, Robert Neil Gerard. "The characterization of Ganoderma populations in oil palm cropping systems." Thesis, University of Reading, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.283672.

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21

Gomes, Maryjane Diniz de AraÃjo. "Sustainability of organic and conventional family based irrigated cropping systems." Universidade Federal do CearÃ, 2015. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=14187.

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Conselho Nacional de Desenvolvimento CientÃfico e TecnolÃgico<br>Family farming has contributed to social development because through millions of small producers it has been a growing industry of entire relevance for the development of the country. Despite the high current production efficiency in agriculture it has been observed many environmental and social impacts, such as: soil erosion, contamination of surface and groundwater, loss of biodiversity, loss of traditional knowledge associated with economic dependence, reducing of job opportunities and income as well as rural exodus and socia

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22

Akley, Korbla Edwin. "Impacts of cropping systems on soil health and microbial ecology." Thesis, Kansas State University, 2015. http://hdl.handle.net/2097/20357.

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Master of Science<br>Department of Agronomy<br>Charles W. Rice<br>Declining soil health is the underlying cause of decreasing agricultural productivity and environmental degradation. To address this challenge, research was conducted to determine how: (1) cover crops affect soil health in Kansas, USA and (2) direct seeding mulch–based cropping (DMC) systems affect soil health in Nyankpala, Ghana. Soil health indicators assessed include: biomass yield (kg ha[superscript]-1), soil microbial respiration (SMR), soil microbial C and N (MBC & MBN), potentially mineralizable N (PMN), dissolved organic

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23

Matlaletsa, Tsoelipe Samuel. "Simulating nitrogen dynamics in sugarcane cropping systems using DSSAT-Canegro." Diss., University of Pretoria, 2016. http://hdl.handle.net/2263/53523.

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Sugarcane is a high-biomass producing crop and often requires substantial amounts of nitrogen (N) fertiliser to achieve optimal yields. Nitrogen fertiliser represents a significant input cost for the sugar industry. This nutrient is highly challenging to manage due to its susceptibility to various kinds of losses following application, for example, leaching and denitrification. In addition to reduced profitability, N losses potentially lead to environmental degradation, for example, through eutrophication of water bodies. As a result of the complexities of N dynamics in sugarcane croppin

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24

Stecker, John A. "Evaluation of residual starter phosphorus bands for no-till cropping systems /." free to MU campus, to others for purchase, 1998. http://wwwlib.umi.com/cr/mo/fullcit?p9901287.

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25

Kage, Henning. "Simulation modelling for improving nitrogen use efficiency in intensive cropping systems." [S.l.] : [s.n.], 2000. http://deposit.ddb.de/cgi-bin/dokserv?idn=977957020.

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26

Rahman, Md Rashedur. "Shrimp Based Rice Cropping Systems in the Coastal Area of Bangladesh." 京都大学 (Kyoto University), 2014. http://hdl.handle.net/2433/188853.

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27

Bourguignon, Emmanuel. "Ecology and diversity of indigenous Trichoderma species in vegetable cropping systems." Lincoln University, 2008. http://hdl.handle.net/10182/641.

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The overall aim of this research was to improve the understanding of the ecology and diversity of Trichoderma species within the soil and rhizosphere of onion (Allium cepa L.) and potato (Solanum tuberosum L.) under intensive management in New Zealand. The indigenous Trichoderma population was measured in a field trial at Pukekohe over a three year period under six different crop rotation treatments. The treatments included two continuous onion and potato rotations (intensive), two onion/potato mixed rotation (conventional), and two green manure rotations (sustainable). Results showed that Tri

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28

Aronsson, Helena. "Nitrogen turnover and leaching in cropping systems with ryegrass catch crops /." Uppsala : Swedish Univ. of Agricultural Sciences (Sveriges lantbruksuniv.), 2000. http://epsilon.slu.se/a214.pdf.

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29

Postlethwaite, Yvonne L. "Sustainability of dryland cropping systems in the Wimmera region of Victoria /." Title page, contents and abstract only, 1998. http://web4.library.adelaide.edu.au/theses/09AFP/09afpp858.pdf.

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30

Vizard, Catherine. "Soil organic matter quality and nitrogen dynamics in sustainable cropping systems." Thesis, University of Newcastle Upon Tyne, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.289279.

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31

Tewoldemedhin, Yared Tesfai. "Characterisation of Rhizoctonia in cropping systems in the Western Cape Province." Thesis, Stellenbosch : University of Stellenbosch, 2005. http://hdl.handle.net/10019.1/2269.

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Thesis (MScAgric (Plant Pathology))--University of Stellenbosch, 2005.<br>The genus Rhizoctonia includes important soilborne plant pathogens that can cause severe economic losses on a wide range of crops including cereal, canola, pasture and grain legume crops. Limited information is available on specific anastomosis groups (AGs), nuclear status, pathogenicity and cross-pathogenicity of Rhizoctonia isolates associated with each of these crops in the Western Cape province. Therefore, these aspects were investigated in this study, since information in this regard is crucial for the developm

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32

Sequeira, Cleiton Henrique. "Soil Organic Matter Dynamics in Cropping Systems of Virginia's Valley Region." Diss., Virginia Tech, 2011. http://hdl.handle.net/10919/37381.

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Soil organic matter (SOM) is a well known indicator of soil quality due to its direct influence on soil properties such as structure, soil stability, water availability, cation exchange capacity, nutrient cycling, and pH buffering and amelioration. Study sites were selected in the Valley region of Virginia with the study objectives to: i) compare the efficiency of density solutions used in recovering free-light fraction (FLF) organic matter; ii) compare different soil organic fractions as sensitive indices of short-term changes in SOM due to management practices; iii) investigate on-farm effec

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33

Moe, Swe Yee. "Analysis of Dynamics of Cropping Systems in the Dry Zone, Myanmar." Kyoto University, 2015. http://hdl.handle.net/2433/199368.

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Kyoto University (京都大学)<br>0048<br>新制・課程博士<br>博士(農学)<br>甲第19044号<br>農博第2122号<br>新制||農||1032(附属図書館)<br>学位論文||H27||N4926(農学部図書室)<br>31995<br>京都大学大学院農学研究科地域環境科学専攻<br>(主査)教授縄田栄治, 教授舟川晋也, 教授白岩立彦<br>学位規則第4条第1項該当

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34

Cruse, Michael James. "Fossil energy use in conventional and low-external-input cropping systems." [Ames, Iowa : Iowa State University], 2009.

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35

Sonder, Kai. "Soil erosion in andean cropping systems : the impact of rainfall erosivity." Hohenheim : Universität Hohenheim, Institut für Pflanzenproduktion und Agrarökologie in den Tropen und Subtropen, 2004. http://opus-ho.uni-stuttgart.de/hop/volltexte/2004/55/.

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36

Thierfelder, Christian. "Soil crusting and sealing in cropping systems of the Colombian Andes /." Stuttgart : Universität Hohenheim, 2003. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=015376941&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.

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37

Burgess, Macdonald Hugh. "Sustainable cropping systems for the Northern Great Plains: energetic and economic considerations." Diss., Montana State University, 2012. http://etd.lib.montana.edu/etd/2012/burgess/BurgessMH0512.pdf.

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Reliance on non-renewable resources is among the fundamental challenges to agricultural sustainability. Quantification of inputs in units of embodied fossil energy offers insight into sustainable use of these resources. Metrics of intensity, efficiency of non-renewable energy inputs to agriculture have been proposed for optimization in search of sustainability in the face of energy scarcity. Such analyses have found controversial results however, and further theoretical understanding is necessary. The research presented here focuses on approaches to sustainability targeting the semiarid northe

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38

Omokanye, Akim Tunde, University of Western Sydney, of Science Technology and Environment College, and Centre for Horticulture and Plant Sciences. "Biological and economic evaluation of maize-based cropping systems for Nigerian smallholders." THESIS_CSTE_HPS_Omokanye_A.xml, 2004. http://handle.uws.edu.au:8081/1959.7/797.

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Indigenous African shifting cultivation production systems, that were developed over many generations and took into account production potential as well as the constraints imposed by natural resources, are no longer practicable for Nigerian smallholder farmers. These systems relied on long fallow for fertility restoration after a period of cropping. Overpopulation has resulted in lower per capita land availability, necessitating a shift to sedentary cultivation systems. In such systems, fallow is short term (months) compared to shifting systems, where it lasted several years. This shift has re

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39

Pachta, Christopher James. "Improving irrigated cropping systems on the high plains using crop simulation models." Thesis, Manhattan, Kan. : Kansas State University, 2007. http://hdl.handle.net/2097/316.

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40

Maxwell-Benson, Kelli S. "Balancing biological and chemical nitrogen in irrigated Phaseolus vulgaris (L) cropping systems." Laramie, Wyo. : University of Wyoming, 2007. http://proquest.umi.com/pqdweb?did=1313917301&sid=1&Fmt=2&clientId=18949&RQT=309&VName=PQD.

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41

Jayasundara, H. P. S. "Productivity, dinitrogen fixation and nitrogen transfer in some legume based cropping systems." Thesis, University of Reading, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.386547.

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42

Smith, Hazel. "Improving the sustainability of water use in baby leaf salad cropping systems." Thesis, University of Southampton, 2013. https://eprints.soton.ac.uk/354419/.

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Future food security is under threat from both climate change and human population growth. Water scarcity is a major limitation to crop production worldwide and the effects of climate change are likely to exacerbate this. Furthermore, an ever increasing human population is driving our demand for food, fuel and fibre. In combination, climate change and population growth, and their interaction, creates a complex problem with regards to improving plant productivity with which to maintain food security. If crop production can be made more efficient, agricultural intensification can be achieved wit

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43

D'Attilio, DeAnna Rae. "Optimizing nitrogen fertilization practices under intensive vineyard cover cropping floor management systems." Thesis, Virginia Tech, 2014. http://hdl.handle.net/10919/56614.

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Under-trellis cover crops have become more prevalent in East Coast grape growing regions through either intentional planting or adoption of native vegetation, to minimize the potential for erosion and to help regulate grapevine size and vigor. These companion crops, however, have sometimes resulted in increased competition for soil nitrogen, leading to decreased vine nitrogen status and berry yeast assimilable nitrogen (YAN). The aim of this study was to determine the effects of different nitrogen fertilization methods applied at varying doses and different times, on vine and berry nitrogen pa

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44

Minoli, Sara. "Managing phenology for agronomic adaptation of global cropping systems to climate change." Doctoral thesis, Humboldt-Universität zu Berlin, 2020. http://dx.doi.org/10.18452/21965.

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Der Klimawandel fordert die Anbausysteme heraus, um das derzeitige Produktionsniveau zu verbessern oder sogar aufrechtzuerhalten. Es wird erwartet, dass zukünftige Trends bei Temperatur und Niederschlag die Ernteproduktivität beeinträchtigen. Es ist daher notwendig, möglicher Lösungen zur Anpassung der Anbausysteme an den Klimawandel zu untersuchen. Ziel dieser Arbeit ist es, das Wissen über die Anpassung von weltweit relevanten Getreidepflanzen an den Klimawandel zu erweitern. Die zentrale Fragestellung ist, ob globale Anbausysteme an den Klimawandel angepasst werden können, indem die Phänol

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45

Roslon, Ewa. "Relay cropping of spring barley and winter wheat /." Uppsala : Dept. of Ecology and Crop Production Science, Swedish Univ. of Agricultural Sciences, 2003. http://epsilon.slu.se/a427-ab.html.

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46

Li, Ru. "Exploring bacterial communities and their functions for soil health under different cropping systems." PLoS ONE, 2012. http://hdl.handle.net/1993/19948.

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Rhizosphere and soil bacteria are important drivers in nearly all biochemical cycles in terrestrial ecosystems and participate in maintaining health and productivity of soil in agriculturally managed systems. However, the effect of agricultural management systems on bacterial communities is still poorly understood. In this study, cultural methods and advanced molecular methods (terminal restriction fragment length polymorphism (TRFLP) and 454- pyrosequencing) were used to identify shifts in soil and rhizosphere bacterial diversity, community composition, and functions under different cropping

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47

Li, Ru. "Exploring bacterial communities and their function for soil health under different cropping systems." PLoS ONE, 2012. http://hdl.handle.net/1993/19948.

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Rhizosphere and soil bacteria are important drivers in nearly all biochemical cycles in terrestrial ecosystems and participate in maintaining health and productivity of soil in agriculturally managed systems. However, the effect of agricultural management systems on bacterial communities is still poorly understood. In this study, cultural methods and advanced molecular methods (terminal restriction fragment length polymorphism (TRFLP) and 454- pyrosequencing) were used to identify shifts in soil and rhizosphere bacterial diversity, community composition, and functions under different cropping

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48

Kravchenko, Anatoliy G. "Overcoming the rotational antagonism of corn following wheat in high residue cropping systems." Diss., Connect to online resource - MSU authorized users, 2006.

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Thesis (M. S.)--Michigan State University. Dept. of Crop and Soil Sciences, 2006.<br>Title from PDF t.p. (viewed on June 19, 2009) Includes bibliographical references (p. 94-99). Also issued in print.

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49

Holland, Jonathan Eddison. "Changes in soil physical properties under raised bed cropping /." Connect to thesis, 2006. http://eprints.unimelb.edu.au/archive/00002537.

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50

Ess, Daniel R. "Energetics of low-input corn production." Thesis, This resource online, 1990. http://scholar.lib.vt.edu/theses/available/etd-06082009-171129/.

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