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 247 for “"crop yield"”.
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Applications of Machine Learning in Apple Crop Yield Prediction
… of machine learning techniques to predict yield in the apple industry. Crop yield prediction is important because it impacts resource and capacity planning. It is, however, challenging because yield is affected by multiple interrelated factors such as climate conditions and orchard …
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Climate change and global crop yield: impacts, uncertainties and adaptation
… of climate change impacts on global crop yield, and of farmers’ adaptive capacity, remains incomplete as previous global assessments: (1) inadequately evaluated the role of extreme weather events; (2) focused on a small subset of the full range of climate change predictions; (3) …
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Remote sensing, normalized difference vegetation index (NDVI), and crop yield forecasting
… (NDVI), to assess and quantify corn and soybean yield potential. Fixed-effect panel and ordinary least squares NDVI regression models were developed for different level of spatial aggregation. Through the regression analysis, the thesis identified the relationship between the accumulation of …
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Contribution of environmental factors to crop yield variation in the US
The magnitude of crop production per unit area has increased in the US in the last 50 years due to the green revolution (Femandez-Comejo, 2004). Yet, even with these increases, there is still variability in crop yield that is present in modem, intensive agricultural systems (Porter and Semenov, …
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Soil Spatial Variability: Structures, Models, and Their Effects on Crop Yield Variability
… for about 52%, and 39% of soybean and corn yields variability respectively. Particle size distribution and organic matter by influencing moisture and nutrient dynamics, were the most important factors determining yield variability in these soils.
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Risk in agriculture : a study of crop yield distributions and crop insurance
Agriculture is a business fraught with risk. Crop production depends on climatic, geographical, biological, political, and economic factors, which introduce risks that are quantifiable given the appropriate mathematical and statistical methodologies. Accurate information about the nature of …
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Perimeter Cropping As a Means of Reducing Insect Injury and Increasing Crop Yield
… insect known to injure a broad range of cucurbit crops. Many studies have focused on insecticide management of this insect in squash (<em>Cucurbita</em>) and pumpkin (<em>Cucurbita pepo</em> Linnaeus) production; however, little work has been documented on organic approaches to reduce or eliminate …
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A novel floating cultivation platform to boost crop yield and improve water quality
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2027-08-01
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Assessment of irrigation use on crop yield and water supplies in the Midwestern U.S.
… irrigation will be significantly beneficial for crop productivity in the future as it will mitigate risk associated with water deficits in the growing season, Regional farmers are expected to rely more on irrigation to mitigate risk due to increased climate variability in the future, resulting in …
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Detecting climate change and its impacts on crop yield in the continental United States
… The impacts of the identified climate changes on crop yield are further assessed. Regression model with climate variables expressed as quadratic function is utilized to model how crop yield responds to the climate since 1970 through various testing scenarios. The impacts of climate change on corn …
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Remote sensing-based assessment of crop yield and water dynamics in the southern Great Plains (USA)
… a crucial tool for estimating and understanding yield variability and water management in diverse cropping systems. This is particularly important in water-limited areas, such as the southern Great Plains, where water is the key to sustaining agricultural production. Therefore, the present …
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Extreme weather events in the upper Midwest: Implications on flood risk, crop yield, and water quality
… focusing on their impacts on flood risk, crop yield, and water quality. Through a series of interconnected studies, the research provides critical insights into the complex effects of extreme precipitation and temperature events, offering valuable guidance for management and adaptation …
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Predicting Field Water Balance, Crop Yield, and the Economics of Drainage Under Various Cropping Systems Using Drainmod
… water management practice for increasing crop yield, research implicated tile drainage in surface and groundwater quality problems. Conservation practices such as crop rotation and controlled drainage may decrease tile flows and improve water quality. A two-year (2014-2015) subsurface …
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The effects of winter feeding systems on beef cow performance, soil nutrients, crop yield and system economics
A study was conducted on an annual cropped field near Lanigan, Saskatchewan over two years (2005-2006, 2006-2007) to evaluate the effects of three extensive winter feeding systems (bale grazing (BG), swath grazing (SG) and straw-chaff grazing (ST-CH)) and one intensive winter feeding system (drylot …
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Using Remote Sensing and Machine Learning to Improve County-Level Crop Yield Prediction in the Us Corn Belt
… detailed and timely information about potential crop yield. Therefore, accurate and timely crop yield prediction is crucial, as it provides essential insights to the stakeholders. Consequently, large-scale crop yield prediction has recently garnered considerable attention. Despite the …
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Agronomic assessment of grazing method of corn residues on cow performance, residue utilization, crop yield, and soil properties
… cow performance, residue utilization, subsequent crop yield, and soil physical and chemical properties. Two grazing methods (strip grazing, (SG) and continuous grazing, (CG)) and a control (ungrazed, (CT)) were arranged in a randomized complete block design with 3 replications each yr for 3 yr. …
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Evaluating effects of water quality BMPs on nitrate-nitrogen losses and crop yield at field and watershed scales
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2023-12-01
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Groundcover, rootstock and root restriction effects on vegetative growth, crop yield components, and fruit composition of Cabernet Sauvignon
… for optimum quality wine production. Cover crops, rootstocks and rootzone restriction were evaluated for their effect on vegetative and reproductive growth on Cabernet Sauvignon. Treatments were arranged in a strip-split-split plot arrangement with under-trellis cover crops (UTCC) compared …
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Synthesis of zeolites and their application as soil amendments to increase crop yield and potentially act as controlled release fertilizers.
… due to the effectiveness of these crystalline microporous solids as soil amendments for plant growth, their cation exchange capacity (CEC) and slow-release fertilizer properties. Most work on slow-release fertilizers has focused on natural Clinoptilolite, Phillipsite and Chabazite. The aim of …
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Quantifying Crop Yield, Bioenergy Production And Greenhouse Gas Emissions From Cropland And Marginal Land Using A Model-Data Fusion Approach
… maize (<em>Zea mays</em> L.)) and cellulosic crops (e.g., switchgrass (<em>Panicum virgatum</em> L.) and <em>Miscanthus</em> (<em>Miscanthus × giganteus</em>)) provides alternative energy to fossil fuels and has been considered to mitigate greenhouse gas emissions. To estimate the large-scale …
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