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 368 for “"Crop production"”.
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Some Economic Aspects of Crop Production
Made available in DSpace on 2014-12-04T21:47:42Z (GMT). No. of bitstreams: 1 0003990.pdf: 10444107 bytes, checksum: d172930718f5269675a13dc3547632c1 (MD5) Previous issue date: 1952
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Optimising nutrient use efficiency in crop production
… population presents a significant challenge for crop production, with increasing pressures upon agriculutral productivity. There is a vast need to improve crop yield and quality using an efficient approach that does not present negative environmental impacts. A novel interrogation technique that …
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Variability in greenhouse gas footprints of crop production
Contains fulltext : 230400.pdf (Publisher’s version ) (Open Access)
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Relay- and double-crop production systems for wheat
Cover crops are important to provide organic matter to soils, diversify cropping systems, and provide economic benefits if the correct cropping systems are utilized. Relay-intercrop production involves overlapping growth cycles of two or more crops. This production system is common with legumes …
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Optimization of Row-Crop Production on Terraced Lands
Made available in DSpace on 2014-12-14T06:37:10Z (GMT). No. of bitstreams: 1 7915420.pdf: 6758427 bytes, checksum: 70b16865b814551f7fa5c2dc8e06c52f (MD5) Previous issue date: 1979
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Accessing Chilling Conditions For Perennial Fruit Crop Production in Kentucky
… (chilling hours) to ensure leaf and flower bud production in the following season. Temperate Regions are characterized by variable winter and spring temperatures. Failure of meeting sufficient chilling requirement results in deformed fruits, unequal maturation, and other plant deformities, …
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Phosphorus Requirement and Chemical Fate in Containerized Nursery Crop Production
… minimally-sufficient P fertilization amounts for production of containerized nursery crops and better understand the effect of routine amendments (i.e., dolomite [DL] and micronutrient fertilizer [MF]) added to pine bark substrates on chemical fate of P fertilizer. Four studies were conducted to …
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Tillage and cover cropping effects on soil properties and crop production
Cover crops (CCs) have been heralded for their potential to retain nutrients in the field and improve soil properties, but their adoption within the Midwestern Corn-Belt remains limited. We assessed the effects of integrating five sets of CCs into corn-soybean rotations under no-till and chisel …
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Tillage Effects on Soil Properties and Crop Production in Southern Illinois
The Harris et al. (1996) soil quality index (SQI) model was tested and modified according to local and regional conditions by changing the threshold limits and standardized scoring functions (SSF) for soil quality indicators. Soils that had been in 8 years of the NT system had SQI of 0.64 as …
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Performance and environmental impacts of biocontainers in horticultural crop production systems
… influence other aspects of plant performance and production efficiency. Results of this work indicate that biocontainers impact growth both positively and negatively as compared to a conventional plastic control, depending on the plant species grown. Despite differences in aboveground size, plant …
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Assessment of perennial bioenergy buffers within a row crop production system
Modern agricultural production systems face a major challenge today. While producing large amounts of food, energy, and bioproducts, these systems need to be managed to achieve long-term sustainability (e.g. crop productivity potential) and minimal downstream effects (e.g. externalities such as …
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Hydrologic and water quality impacts from perennial crop production on marginal lands
… lands are not heavily engaged in agricultural production or may not be suitable for intensive row-crop food/feed production. However, meeting biofeedstock production goals will require large amount of marginal lands and the unintended consequences of producing biofeedstocks on marginal lands …
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Economic Modeling of Bioenergy Crop Production and Carbon Emission Reduction in Illinois
These results have several policy implications. Carbon cap-and-trade policy, if adopted, is likely to create an incentive for biomass co-firing. Such a policy would reduce the significant amount of carbon emissions and help the State obtain a considerable share of renewable energy. The carbon …
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Biomass energy crop production and residential pellet consumption in the midwestern U.S.
Made available in DSpace on 2011-01-21T22:47:15Z (GMT). No. of bitstreams: 2 Freeh_Emily.pdf: 1216438 bytes, checksum: 0a0e8a2840f0e3281296a6d82c7b95bf (MD5) license.txt: 4059 bytes, checksum: 7137c5a673b7787cded02a9862b69b0a (MD5)
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Essays in the economic implications of select animal health and crop production issues
Production agriculture is faced with many risks which may be difficult to manage and can result in significant negative economic impacts. For the individual farmer, this can be problematic and potentially poses a challenge to remain viable and profitable when faced with uncertain circumstances. …
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The implications of improving the conservation value of field margins on crop production
The effect of field margin management on crop yield and weed biomass in the crop edge (headland) was investigated. Treatment did not have any significant effect on cereal yields, and taking a one metre strip out of crop production to establish a sterile, natural regeneration or sown strip, did not …
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Evaluation of integrated weed management techniques and their nuances in Virginia crop production
… targets weed seeds retained on the plant at crop harvest and either destroys, removes, or concentrates them. Research is limited on the effectiveness of HWSC in US cropping systems. For HWSC to be effective it is important to know when and how many seed are shed from a weed species in …
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A study of allotments and small land plots: benchmarking for vegetable food crop production
… financial efficiencies for vegetable food crop production and to demonstrate that local vegetable food crop growing is a viable option. The work identifies techniques for communities to increase sustainability on small land plots in Wales [UK]. Initial research shows limited availability of …
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Measurement of Cover Crop Evapotranspiration and Impacts on Water Management in Crop Production Systems
<p>Cover cropping is a popular agriculture practice that provides many benefits to the soil and subsequent cash crops. However, eastern South Dakota lies in a transitional climatic zone between the subhumid climate to the east and the semiarid climate to the west, an area susceptible to both excess …
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