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 126 for “"Crop growth"”.
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MEASURING AND MODELLING COVER CROP GROWTH AND AGRONOMIC EFFECTS
Cover crops are cultivated during the bare soil period between the harvest of a cash crop and the sowing of the next one. Their cultivation puts into effect the permanent soil organic cover principle of conservation agriculture and exerts several agro-ecological services, among which the most …
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Soil conditions and early crop growth after repeated manure applications
… and to relate those effects to early plant growth and development.Four experimental sites were used, representing the Dark Brown (Plenty), Brown (Riverhurst – irrigated), Black (Dixon) and Gray (Melfort) Soil Zones of Saskatchewan, where liquid swine manure had been applied for four to seven …
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Corn Yield Prediction Using Crop Growth and Machine Learning Models
… in smart farms. We introduce a mechanistic crop growth model to predict crop growth and subsequent yield, subject to weather, soil parameters, crop characteristics and management practices. We also seek to measure the influence of nitrogen on yield throughout the growing season. The machine …
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Investigating Hops Production in Arkansas to Support Specialty Crop Growth
… production occurs in the Pacific Northwest, but growth in the craft beer industry is driving efforts for hops production in other U.S. regions. Recommendations on hops cultivar suitability, fertility, and management are needed for the U.S. mid-south region. Objectives of this research on …
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Quantifying How High Tunnels Create a Microclimate For Improved Crop Growth
… inside HTs, how farmers were using HTs to grow crops and how the microclimate inside HTs led to improved crop growth. The HT microclimate varied by season, with more growing degree days inside the HT than outside in the spring, fall and winter. The way farmers managed HTs using manual …
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Effect of Scrubber Sludge and Fly Ash on Soil Properties and Crop Growth
… mays L.) and soybean (Glycine max (L.) Merr.) growth, nutrient composition, and yield.
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Modeling salt movement and halophytic crop growth on marginal lands with the APEX model
Saline soils negatively impact crop productivity in nearly 20% of irrigated agricultural lands worldwide. Cultivation of highly salt-tolerant plants, or halophytes, may increase productivity compared to conventional salt-sensitive crops (i.e., glycophytes), thereby increasing the economic potential …
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Modelling of water balance and crop growth based on Earth Observation and re-analysis data
L'abstract è presente nell'allegato / the abstract is in the attachment
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A numerical study of cropland-atmosphere feedbacks by incorporating a crop growth module in the WRF model
This study investigates cropland-atmosphere feedbacks in the Midwestern United States. Growing crops impact local climate during the growing season by influencing heat, moisture and momentum exchange between the land and the atmosphere. These changes in turn affect the crop growth, thus completing …
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Improving Retrievals of Crop Vegetation Parameters from Remote Sensing Data
… systems are difficult to model because crop growth is driven by the strongly nonlinear interaction of Genotype x Environment x Management (G x E x M) factors. Due to the nonlinearity in the interaction of these factors, the amount of data necessary to develop and utilize models to …
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Effects of polyacrylamide (PAM) and gypsum on irrigated and dryland potatoes (Solanum tuberosum L.).
… polyacrylamide (PAM) and gypsum on the growth and yield of 'Ilam Hardy' potatoes in 2001-2002. At the final harvest, tuber yields were similar (59 500 kg ha⁻¹). Environmental factors dominated results, particularly January rainfall, which was 150% of the 16-year average. Economic yield …
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Characterizing corn growth and development using computer vision
… resources requires a better understanding of crop growth and development. Current modeling efforts aimed at predicting the response of plants to environmental conditions lack the ability to relate results to basic characteristics observed in the field. The ability to reliably evaluate both …
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Corn Production, Inorganic Nitrogen Distribution, and Soil Chemical Transformations Associated With Liquid Beef Manure Application Methods
… application method, many producers reported crop growth and production problems when liquid manure was knife injected into soil. Field and laboratory studies were conducted to determine the effects of liquid beef manure application methods and nitrification inhibitors on corn (Zea mays L.) …
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Investigation of climate variability and climate change impacts on corn yield in the Eastern Corn Belt, USA
… application requires a clear understanding of crop responses under various climate stresses. This is especially important for evaluating future climate impacts. Therefore, correct representation of corn growth and yield projection under various climate conditions (limited or oversupplied water) …
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Treating Brackish Groundwater for Irrigation with Selective Electrodialysis & Nanofiltration
… ions (Na⁺ and Cl⁻), which are detrimental to crop growth and must be removed before irrigation. Currently, the most widely used technology to remove the monovalent ions from water is reverse osmosis (RO) desalination, but this technology also removes divalent ions that are beneficial to crop …
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Reducing Corn Yield Variability and Enhancing Yield Increases Through the Use of Corn-Specific Growth Models
Crop simulation models (CSMs) are used to evaluate management and environmental scenarios on crop growth and yields. Two corn (Zea Mays L.) crop growth simulation models, Hybrid-Maize, and CERES-Maize were calibrated and validated under Virginia conditions with the goal of better understanding corn …
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Ground Sensor Based Variable Rate Nitrogen Management
… variable rate nitrogen application at specific crop growth stages, has the potential of not only increasing the yield, but also of reducing the total N consumption. This result, however, was obtained based on only a one-year field test. Additional field tests are recommended to validate the …
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Stover, tillage, and nitrogen management in continuous corn for grain, ethanol, and soil carbon
… questions regarding its potential effects on crop growth and productivity as well as soil quality. Previous research has generally occurred in environments different than those found in the Upper Midwest, meaning application of those conclusions to the Upper Midwest may not be appropriate. …
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The potential application of variable renewable energy supplies to increase the horticultural productivity of the Isle of Lewis, Scotland.
… in using variable renewable energy to sustain crop growth were investigated using the Isle of Lewis as a case study. Methods investigated sought to exploit plants’ abilities to accommodate a variable solar input by supplementing it with variable renewable energy. The extant solar resource on …
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Energy Models for Urban-Integrated Agriculture
… controls, environmental conditions and crop growth. Results show the importance of controlling air temperatures within an optimal range, and that ventilation and lighting are the key drivers influencing the farm temperatures. Thus, a forecasting model is developed to provide feedback on …
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