Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 47 for “"crop residue"”.
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Cover crop residue effects on machine-induced soil compaction
Crop production systems which utilize the biomass produced by rye (<i>Secale cereale</i> ) to suppress weed growth and conserve soil moisture have been developed at Virginia Tech. The success of alternative, reduced-input crop production systems has encouraged research into the potential for …
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Interactions between cover crop residue and microbial community affect weed suppression
… weed control. Incorporation of cover crop residues is an important approach that contributes to alternative weed management systems. The cover crop residue-associated allelochemicals can inhibit weed germination, growth and production. Soil microbial communities are especially …
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Agricultural crop residue cover estimation using image analysis and machine learning
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2025-08-01
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Air quality impacts of crop residue burning in India and mitigation alternatives
Crop residue burning is a leading contributor to air pollution and ill health in India. Despite current bans to curtail agricultural fires, burning persists because of a lack of alternatives that are both effective and politically viable. This thesis applies adjoint of the GEOS-Chem regional …
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The role of crop residue and nitrogen in the corn-soybean rotation effect
While we showed that crop residue and N rate and form had some effect on yield and other parameters associated with N uptake and utilization, we found no consistent interaction between crop residue and N form that would help to manage continuous corn and soybean to overcome the lack of rotation …
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Broad-scale Assessment of Crop Residue Management Using Multi-temporal Remote Sensing Imagery
… dimensions for development of effective crop management practices and policies. Because Landsat has been and will continue to image the Earth globally, it provides opportunities for systematic mapping of crop residue cover (CRC) /tillage practices. Thus, the overall objective of this …
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Crop residue management effects on crop production, greenhouse gases emissions, and soil quality in the Mid-Atlantic USA
… stover and wheat straw (Triticum aestivum L.) residues have particular promise given these crops are widely grown and their cellulosic fractions present a captured resource as a co-product of grain production. Annual systems also offer the ability to change crops rapidly in response to changing …
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Impacts of Crop Residue and Cover Crops on Soil Hydrological Properties, Soil Water Storage and Water Use Efficiency of Soybean Crop
<p>Cover crops and crop residue play a multifunctional role in improving soil hydrological properties, soil water storage and water use efficiency (WUE). This study was conducted to better understand the role of crop residue and cover crop on soil properties and soil water dynamics. The study was …
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Herbicide Carryover to Cover Crops and Evaluation of Cover Crops for Annual Weed Control in Corn and Soybeans
While cover crops are actively growing, they compete with winter annual weeds. Studies were conducted to determine the ability of early planted cover crop monocultures and mixtures and a fall applied residual herbicide to compete with winter annual weeds. Cereal rye containing cover crops provided …
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An Examination of Neglected Issues in Illinois No-Till Adoption Research and the Educational Implications Thereof
… very narrow slots without disturbing last year's crop residue."
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Management and assessment of winter cover crop systems for supplying nitrogen to corn in the mid-Atlantic region of the United States
Research examining cover crop-corn systems focuses on corn planted into chemically desiccated cover crop residue using no-tillage practices. Two field studies including rye (Secale cereale L.), hairy vetch (Vicia villosa Roth), and rye+hairy vetch cover crops were established to determine the …
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High Residue Cover Crops for Annual Weed Suppression in Corn and Soybean Production and Potential for Hairy Vetch (Vicia villosa) to be Weedy
After termination, cover crop residue can suppress weeds by reducing sunlight, decreasing soil temperature, and providing a physical barrier. Experiments were implemented to monitor horseweed suppression from different cover crops as well as two fall-applied residual herbicide treatments. Results …
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Manifold learning based spectral unmixing of hyperspectral remote sensing data
… or spaceborne sensors are utilized to quantify crop residue cover over an extensive area. Although remote sensing indices are popular for characterizing residue amounts, they are not effective with noisy Hyperion data because the effect of residual striping artifacts is amplified in ratios …
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Evaluating the interactions of crop management, carbon cycling, and climate using Earth system modeling and remote sensing
Crop management practices, such as soil tillage and crop residue management, are land management activities with potentially large impacts on carbon (C) cycling and climate at the global scale. Improvements in crop management practices, such as conservation tillage or 'no-till' (NT), have been …
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Cover crops to regenerate soils and increase profitability in dryland crop production in the semi-arid central Great Plains
Replacing fallow with dual-purpose cover crops (CCs) could enhance soil health and increase cropping system profitability when CCs are grazed or hayed by providing an economic benefit to offset potential lost revenue when crop yields are reduced after CCs in dry years. However, there is concern …
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Soil fertility management and economics of soybean in Ghana
… in temperature are more likely to complement crop residue with compost. Similarly, farmers exposed to a long-term change in temperature and rainfall complement manure with compost while a trade-off is observed between crop residue and mineral fertilizer for farmers who have experienced either …
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Agricultural Technology Adoption and Adaptation under Climate Change: Microevidence from Niger
… livestock products, which increase pressure on crop residues use on the land. In this study, I use panel socio-economic data combined with village rainfall level from Niger to investigate how different types of weather shocks including drought and wet conditions influence farmer’s inputs …
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Impact of Conservation Tillage on Soil Erosion and the Agronomic Performance of Flue-Cured Tobacco
… crimson clover with either wheat or rye as cover crop mulches for conservation tillage production of Virginia dark-fired tobacco. Conservation tillage, regardless of cover crop, reduced dark-fired tobacco yields approximately 779 and 488 pounds per acre in 1996 and 1997, respectively. The removal …
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Improving Early Season Sidedress Nitrogen Rate Prescriptions for Corn
… requires the most nitrogen (N) of cereal grain crops and N supply is correlated with grain yield. Canopy reflectance has been used to assess crop N needs and to derive optimum application rates in mid-season corn. Canopy reflectance has not been useful for N rate determination in early season …
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Variabilité de la respiration hétérotrophe du sol dans des écosystèmes agricoles: Analyse à différentes échelles spatiales et temporelles.
… samples taken from a limed agricultural field. Crop residue management (in both quantity and quality), as characterized by relatively low input levels in our experiment, influenced soil carbon stocks in the long term. However, HR, microbial biomass, labile carbon and metabolic diversity were not …
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