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 17 of 17 for “"nutrient use efficiency"”.
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Optimising nutrient use efficiency in crop production
… such as cell wall expansion. This information is useful prior to monitoring studies as normal leaf growth could be considered background variance. No significant local or systemic effects manifest as a consequence of interrogation with these techniques, establishing this as a non-destructive …
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Composted dairy manure and arbuscular mycorrhizae influence on weed competition and potato yield
… zones. Growers that have access to compost may use it to improve soil health and increase tuber yields, but compost may also impact microbial communities, weed competition, weed seed fecundity, mortality, and dormancy. Potatoes were grown in field plots amended with 0, 4, or 8 t carbon (C) …
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Biochemical Characterization of Arabidopsis Enzymes Involved in Inositol Pyrophosphate Biosynthesis
… signaling. This research dissertation focuses on the inositol phosphate signaling pathway in plants, with emphasis on elucidating how a new class of signaling molecules collectively referred to inositol pyrophosphates are synthesized. Inositol pyrophosphates are an emerging class of …
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Stover, tillage, and nitrogen management in continuous corn for grain, ethanol, and soil carbon
… not be appropriate. This research is unique because it was conducted on heavy-textured, poorly-drained soils in several tillage systems in environments where soil temperature is often a limiting factor on crop growth. This research indicates corn stover removal in continuous corn cropping (CC) …
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Characterizing natural genetic variation in photosynthetic efficiency across 44 accessions and five subpopulations of oryza sativa
… imperative. Improving photosynthetic efficiency at the leaf level, especially leaf CO2 uptake (Asat) is an approach to not only bettering crop yields, but also optimizing water and nutrient use efficiency. As the world’s second most cultivated crop, improving photosynthesis in Oryza …
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Nutrient cycles across topography in drainage-impaired Corn Belt soils
Greenhouse gas emissions and nutrient leaching from Corn Belt soils pose a threat to both local and global human and environmental health. Topographic depressions in the US Corn Belt have documented impacts on hydrology, crop production, soil characteristics, and soil microbial communities. These …
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Genetics by Nutrient Availability Interactions on Short-term Carbon Pools and Fluxes in Young Pinus taeda Plantations
… this research was to determine how genetics and nutrient availability influence C cycling in intensively managed southern pine forests. This work consisted of a two year field and a complimentary one year greenhouse study each split into above- and below-ground pools and fluxes. Both the …
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Time And Rate Of Nitrogen Fertilization Influence Maize Nitrogen Use Efficiency And Soil Enzyme Activity
… improved maize grain and biomass yield, maize nutrient uptake, and nitrogen use efficiency (NUE). At Lamberton, grain yield, nutrient uptake, and NUE parameters did not differ among treatments applied at recommended rates, regardless of application time. At Waseca, applying the recommended N …
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Forage Yield Variability on New York Dairy Farms
… yields will reduce feed imports and enhance nutrient use efficiency. To improve forage production, limitations to production need to be identified. While yield records can provide integral information, whole farm evaluations have shown that accurate yield data are difficult to collect for …
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Defining functional microbiomes of wheat (Triticum aestivum) and maize (Zea mays), under regenerative management practices, in South Africa
… fundamental ecosystem processes, including nutrient cycling, pathogen and drought resistance, and soil structural development. Despite their central role in ecosystem functioning, the dynamics of soil microbiomes under regenerative agricultural systems remain poorly understood, particularly …
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Agronomic management to improve corn productivity under high-yielding environments
… to plant, and 3) what nitrogen (N) program to use. Hybrid selection is a critical management decision made by farmers because for any given year the spread in grain yield among current commercial hybrids that year can be greater than 100 bu acre-1. In addition, hybrids vary substantially in …
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Water and nutrient transport dynamics during the irrigation of containerized nursery crops
Increased water- and fertilizer-use-efficiency in containerized crop production, via reduced water loss, enhances crop-available nutrients while reducing non-point source agrichemical contributions in accordance with regulatory standards. Previous studies detailed nutrient leaching patterns …
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Optimizing Corn and Cotton Performance with Adaptive Management Systems and Subsurface Drip Irrigation in the Mid-Atlantic USA
… conditions which impact overall crop growth and nutrient use efficiency. More data are needed on adaptative corn management strategies that focus on increasing nutrient use efficiencies and crop yields (i.e., 4R nutrient management, biostimulants, and in-season crop protection chemicals). With …
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Optimizing nutrient availability for high-yield corn production
… of modern hybrids require higher amounts of nutrients and management to sustainably produce higher yield levels. Throughout a growing season, there are several factors that affect nutrient availability to plants, ultimately influencing how well a plant can partition nutrients into the …
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CARBON AND NITROGEN CYCLING IN GIANT CANE (ARUNDINARIA GIGANTEA (WALT.) MUHL.) RIPARIAN ECOSYSTEMS
… for agriculture and fire suppression) has caused giant canebrakes to become critically endangered ecosystems. Increasing evidence suggests the loss of canebrakes has directly impacted riparian ecosystems, resulting in increased soil erosion, poorer water quality, and reduced flood control. …
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Innovations in fertilizer use and agronomic management for greater productivity of corn and soybean
… soybean grain yields have resulted in greater nutrient demands from the soil and fertilizer, resulting in many soil’s nutrient reserves to be drawn down. With the advent of innovative precision agricultural technologies, fertilizer sources, and management practices, current evolving management …