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 27 for “"Nitrogen Use Efficiency (NUE)"”.
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Winter Barley as a Commodity Cover Crop in the Mid-Atlantic Coastal Plain and Evaluation of Soft Red Winter Wheat Nitrogen Use Efficiency by Genotype, and its Prediction of Nitrogen Use Efficiency through Canopy Spectral Reflectance in the Eastern US
… was similar due to decreased fertilizer input. Nitrogen use efficiency (NUE) of soft red winter wheat (SRWW) can be improved by characterizing genotypes for NUE using canopy spectral reflectance [(CSR), a cheap, rapid and non-destructive remote sensing tool]. The other objectives of this study …
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Physiological and Molecular Dissection of Salinity Tolerance in Arabidopsis and Maize and Nitrogen Uptake in Wheat
… we compared two genotypes with contrasting nitrogen-use-efficiency (NUE), VA08MAS-369 and VA07W-415, to dissect physiological and molecular mechanisms underlying NUE regulation. Our agronomic data revealed that line 369 maintained yield and yield-related parameters and exhibited greater NUE …
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Strategic applications of nitrogen fertiliser to increase the yield and nitrogen use efficiency of wheat.
In southern Australia a large proportion of crop nitrogen requirements are usually applied early in the season, either just before or at sowing, or during the first 6-8 weeks after sowing. However, the time of greatest demand for nitrogen by wheat crops is during the stem-elongation phase when the …
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Response of maize to selected productivity traits and biological nitrogen fixation in cowpea-maize combinations under conservation farming system.
… performance of cowpea genotypes for Biological Nitrogen Fixation (BNF) in conservation farming system. (iii) identify maize – cowpea combinations that result in high water use efficiency (WUE) and nitrogen use efficiency (NUE) for high maize productivity under CF system. The trials were …
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The Effect of Split Nitrogen Fertilization on Yield, Quality, and Nitrogen Use Efficiency of Spring Barley Grown on Two Different Soil Types in Iceland
Split nitrogen (N) fertilization is a strategy aimed at maximizing nitrogen use efficiency (NUE) by applying N at specific growth stages when plant utilization is greatest, thereby minimizing environmental impacts from runoff and greenhouse gas emissions. Icelandic studies on split fertilization in …
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Genetic Analysis of Nitrogen Remobilization and Kernel Compositon in Zea Mays L. and Sorghum Bicolor (L.) Moench
<p>Genetic Analysis of Nitrogen Remobilization and Kernel Composition in Zea Mays L. and Sorghum Bicolor (L.) Moench. Major Professor: Mitchell Tuinstra. Modern maize (Zea mays L.) production relies heavily on nitrogen fertilization for high productivity. Over-application of nitrogen fertilizers in …
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Genetic improvement for nitrogen utilization in maize
Increased nitrogen use efficiency (NUE) is an important target for future maize improvement. Essential to the design of an effective breeding program to select maize hybrids with enhanced NUE is an understanding of past progress, variation among maize germplasm for NUE and its component traits, and …
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Genetic Variability of Growth and Development in Response to Nitrogen in Two Soft Winter Wheat Populations
The use of nitrogen (N) fertilizers is both costly to farmers and contributes to environmental degradation. N applied to wheat accounts for 18% of N applied to farmland globally, making it a prime target for reducing and optimizing N application. Chapter I is a review on nitrogen use efficiency …
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Influence of nitrogen rate on corn grain yield, nitrogen use efficiency, and nitrate leaching on coarse-textured Minnesota soils
Nitrogen (N) is often the limiting nutrient in irrigated sandy soils. Nitrogen poses a threat to water quality in its nitrate form because it is easily leached through the root zone of the corn (Zea Mays L.) crop following rain and irrigation events. Leaching is enhanced in sandy soil conditions …
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Crop Rotations for Sustainable Intensification
… investigates how crop rotation design and nitrogen (N) management can contribute to achieving high and stable yields while improving nitrogen use efficiency (NUE) in arable cropping systems. The research is based on a long-term crop rotation experiment conducted at a high-yielding site in …
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Time And Rate Of Nitrogen Fertilization Influence Maize Nitrogen Use Efficiency And Soil Enzyme Activity
… and spring) and split applications of differing nitrogen (N) rates for maize (Zea mays L.) on an irrigated Hubbard-Mosford loamy sand complex at Becker, a non-irrigated Normania loam soil at Lamberton, and a non-irrigated Nicollet clay loam soil at Waseca, MN. Fall and spring treatments were …
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Toward circular and sustainable nitrogen (N) management in the US and globally
… have more than tripled the creation of nitrogen (N), enabling unprecedented gains in agricultural productivity. Yet inefficient N use has generated widespread air and water pollution, greenhouse gas (GHG) emissions, and ecosystem degradation, undermining food-energy-water (FEW) …
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Regulation of nitrate uptake and calcium signaling in arabidopsis
Nitrogen (N) is one of the key nutrients required by plants, and its most abundant form, nitrate (NO3-), has been extensively used in fertilizers to improve crop yield. However, this has also led to increased environmental pollution due to leaching and volatilization. Improving nitrogen use …
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Interrogating the multi-stress tolerance of Oryza australiensis using novel genomic and phenomic strategies
… high-input scenarios, requiring substantial nitrogen and water inputs to achieve their yield potential. As a result of intensive breeding for performance in the relatively benign conditions of the tropics, they are also susceptible to a number of abiotic stresses including heat wave events …
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Characterizing biological nitrification inhibition using native Nitrosomonas europaea: mechanism studies and maize cultivar screening
The nitrogen-use efficiency (NUE) of agricultural plants is notoriously poor, typically ranging from 30 to 50%. Ideally, nitrogen (N) fertilizers, primarily applied as ammonium (NH₄⁺), would remain stable to allow optimal uptake by plants. However, NH₄⁺ is rapidly transformed within the soil …
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Cropping systems under water-limited conditions: effects of rotation and nitrogen management on yield, resource use efficiency, profitability, and soil properties
… cropping systems that balance yield, resource-use efficiency, and economic viability. This thesis integrates results from field studies conducted at different temporal scales, location and under different water-management conditions to evaluate how crop rotation diversity, cover crop …
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Essays on Malawian agriculture: Micro-level welfare impacts of agricultural productivity; profitability of fertilizer use; and targeting of fertilizer subsidy programs
… essay stands alone as an independent study because of differences in research questions and the methodologies used in addressing the questions.</p> <p>The first essay analyzes the micro-level welfare impacts of agricultural productivity. Welfare is measured by various dimensions of poverty and …
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Genetic, agronomic and compositional characterization of brown midrib sweet sorghum lignocellulosic biomass for ethanol production
… gene resulting in reduced lignin content. A useful InDel marker for the mutant allele of <em>COMT</em> was identified for this population. Fiber detergent analysis (FDA) was performed to estimate the amount of hemicellulose, cellulose and lignin. Glucose recovery and theoretical ethanol yield …
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Alternative and Improved Cropping Systems for Virginia
… profit for grain growers and lower costs for end-users. Increased feed grain production in this region will necessitate improved corn (Zea mays L.) management techniques and adoption of alternative feed grains such as grain sorghum (Sorghum bicolor L.). In order to achieve our overall objective of …
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Evaluation of wheat(triticum aestivum l.)gentypes for nitrogen and water use efficiency
… severely limited by cost of irrigation water and nitrogen fertilisers. A study was carried out at the National Irrigation Research Station (Nanga) in 2011 dry season to evaluate wheat genotypes for nitrogen and water use efficiency and identify wheat morphological traits that influence nitrogen …
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