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 29 for “"corn-soybean rotation"”.
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Liquid swine manure as a phosphorus source for corn-soybean rotation
… on farmers' fields using liquid swine manure on corn and soybean crops. One study used conventional research plot methodology with objectives to evaluate (a) manure P effects on early plant growth, early P plant uptake, grain yield, and P removal with grain; (b) crop response to fertilizer P …
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The role of crop residue and nitrogen in the corn-soybean rotation effect
… and N form that would help to manage continuous corn and soybean to overcome the lack of rotation effect. (Abstract shortened by UMI.)
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EFFECT OF COVER CROPS ON NUTRIENT DYNAMICS AND SOIL PROPERTIES IN CORN-SOYBEAN ROTATION IN SOUTHERN ILLINOIS
Corn (Zea mays L.) and soybean (Glycine max L.) production in the Midwest US can result in significant nutrient leaching to groundwater and surface waters, which contributes to eutrophication and hypoxia in the Gulf of Mexico. A promising strategy to control nutrient leaching and sediment runoff …
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Effect of irrigation on fertilizer nitrogen requirement, economic returns, and water availability in a corn-soybean rotation
… on yield potential and economic returns in a corn-soybean rotation on a claypan soil; 2) Evaluate an ET checkbook method for assessing water status of corn and soybeans under two irrigation methods; 3) Understand how delayed N applications affected the economically optimum N rate (EONR) and …
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Carbon additions can improve nutrient cycling and fertilizer use efficiency for phosphorus and potassium in a corn-soybean rotation
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2024-09-16 without embargo terms
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Long-term Impacts of Annual Cattle Manure and Fertilizer on Soil Quality Under Corn-Soybean Rotation in Eastern South Dakota
… their impacts under long-term application in corn-soybean rotation need to be evaluated. Nutrient based recommended rates of manure applications on soils are important and also need to be monitored. This study, therefore, was conducted at two long-term sites to assess the impacts of manure and …
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Long-term effects of land application of poultry manure on crop production, and soil and water quality under a corn-soybean rotation system in Iowa
… studied, its effects on water quality, under corn and soybean rotation, in Iowa have not been extensively studied. Therefore, a long-term study was initiated in 1998 to investigate the impacts of poultry manure on crop production and environmental quality (soil and water quality). This thesis …
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Entomological considerations for domestication of pennycress, Thlaspi arvense, as a cash cover crop
… cover crop and oilseed crop for the Midwest U.S. corn-soybean rotation. This domestication presents significant agricultural and environmental benefits; however, understanding of the interactions between pennycress and insect herbivore communities and agroecosystems remains limited. This research …
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Evaluation of soybean aphid resistance, yield qtl confirmation, and genetic gain in soybean
Soybean Aphid Resistance in Exotic Soybean Lines The soybean aphid, Aphis glycines Matsumura (Hemiptera: Aphididae), is a common insect pest of soybean [Glycine max (L.) Merr] in China and is also found frequently in other Asian countries. It was identified in the US in 2000 and has since spread …
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Life Cycle Assessment of Select Agricultural Practices: Assessing the Potential for Climate Mitigation
… studies. The first study investigated future corn and soybean yields in the Raccoon watershed in the US Corn Belt using projected climate data. This study used the Environment Policy Integrated Climate (EPIC) model to estimate the impact of climate change for 2015-2099 with data downscaled …
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Soil carbon and nitrogen cycle modeling for bioenergy crops
… % reduction in soil inorganic nitrogen), unlike corn-corn-soybean rotation. This finding resulted from an increase in the carbon/nitrogen (C:N) ratio of topsoil, deactivating soil microbes.
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Predicting Field Water Balance, Crop Yield, and the Economics of Drainage Under Various Cropping Systems Using Drainmod
… problems. Conservation practices such as crop rotation and controlled drainage may decrease tile flows and improve water quality. A two-year (2014-2015) subsurface drainage study was conducted at South Dakota State University Southeast Research Farm (SERF) near Beresford, South Dakota to …
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Quality Soil Management in Illinois Using Winter Cover Crops
… was to assess the effects of different crop rotations on several soil physical and chemical properties. Three crop sequences including WCC were compared with winter fallowing (control) in a corn (Zea mays L.)-soybean [Glycine max (L.) Merr.] rotation under no-tillage. The experimental design …
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Tillage effects on soil physical properties, weed seed distribution in soil and shifts in species
… and shifts in species. The experiment included a corn-soybean rotation with both crop grown each year. For this study, only the corn crop was considered. The tillage systems for corn consisted of fall chisel plow followed by spring disk and field cultivate (CDFC), spring field cultivate (FC) and …
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Managing the continuous corn yield penalty with crop and residue management
Corn (Zea mays L.) grown in rotation with soybean [Glycine max (L.) Merr.] generally yields more than corn grown continuously, with the latter designated the continuous corn yield penalty (CCYP). Due to global food security concerns and corn’s versatility in food products, animal feed, and …
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Nematodes as indicators of sustainable soil health management practices in corn-soybean production
… examined how winter cover crops (WCCs) in a corn–soybean rotation influence nematode communities and soil health indicators. The study observed that long-term use of WCCs significantly increased total nematode abundance and diversity, while reducing the prevalence of herbivorous nematodes, …
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Analysis of the Effect of Two Tillage Systems on Soybean (Glycine Max (L.) Merrill) Growth
… on highly-drained, well structured soils of the Corn Belt, soybean yield is not substantially affected by tillage. Available reports of differences are in the minority. There is relatively little information as to what extent and under what conditions the tillage methods affect the growth of …
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Field study with rock phosphate and superphosphate 1952 to 1990 and dissolution of rock phosphate in silage leachate
… (SP) on crops consisting of oats-alfalfa (hay)-corn-corn (rotation ""A"") and corn-soybean (rotation ""B""). Phosphorus applications ranged from 0 to 80 pounds P$\sb2$O$\sb5$/a. Agronomically, rotation ""B"" responded better than rotation ""A"". Eighty pounds of SP P$\sb2$O$\sb5$/a gave the …
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Long-term effect of crop rotation and tillage on soil properties
Shifts in cropping systems from long-term rotations including forages to mostly annual crops has intensified tillage, and led to the development of conservation tillage practices such as no-till. There is a shortage of information about the interactive effects of rotation and tillage on soil …
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Land-use change effects on soil organic carbon, total soil nitrogen, and soil erosion in a temperate forest and grassland
… at both sites utilized no-till management and a corn-soybean rotation. SOC and TSN concentrations of several layers and landscape positions were determined to a depth of 1m at the Iowa sites and 0.75 m at the Illinois sites due to the presence of a root-restricting fragipan layer. Fly ash was …
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