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 30 for “"Nutrient use"”.
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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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Water and Nutrient Use Evaluation of South Dakota Vegetated Treatment Systems
… system's ability to utilize applied water and nutrients. This study was conducted to determine whether existing VTS technology in South Dakota is effective at preventing release of water and nutrients from animal feeding operations.<br /> Vegetated treatment systems at South Dakota feedlots …
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Enhancing mineral nutrient availability and corn productivity with biostimulants
… population, nitrogen fertility, additional nutrient fertility, and foliar protection (Ruffo et al., 2015). In recent years, a new technology has been discussed, namely, biological products. These products have a wide variety of uses but are typically intended to increase crop growth, relieve …
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The effect of soil nutrient availability on resource allocation in tropical tree species
… and in their functional strategies for resource use and acquisition. Soil resources influence productivity of tropical forests and the distributions of tree species across edaphically heterogeneous landscapes. My dissertation evaluates functional variation among tropical trees in nutrient use, …
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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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The Effects of Neuroendocrine Stress on Larval Development
… can affect larger-scale ecosystem dynamics, like nutrient cycling and disease epizootics. Animals are not equally susceptible to stressors across all stages of their life cycles. Critical windows of development, common in young and developing animals, are time periods when stressors have an …
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Characterizing natural genetic variation in photosynthetic efficiency across 44 accessions and five subpopulations of oryza sativa
… crop yields, but also optimizing water and nutrient use efficiency. As the world’s second most cultivated crop, improving photosynthesis in Oryza sativa would have positive implications for millions worldwide who are dependent on rice for their economic livelihoods and the majority of their …
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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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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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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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Soil Carbon and Nutrient Cycling Across Cover Types in Southern Appalachian Hardwood Forests
… the Ridge and Valley physiographic province were used to determine fine scale soil respiration (Rs ) and nutrient dynamics among four distinct cover types, white oak (WO, Quercus alba L.), scarlet oak (SO, Quercus coccinea Muech.), chestnut oak (CO, Quercus montana Wild.) and a pine-oak …
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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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ECOLOGICAL AND EVOLUTIONARY DRIVERS OF SPECIES DISTRIBUTIONS IN THE GRASSY BIOME
… rates, owing to differences in plant water-use, nutrient-use, and photosynthesis. Therefore, global change is anticipated to further modify biome distributions and contribute further to biogeochemical cycling. However, with increased theoretical attention and availability of global datasets …
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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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High throughput phenotyping and quantitative genetics of leaf functional traits in C4 grasses
… crop productivity without increased resource use requires greater in whole plant water and nutrient use efficiencies. To meet these challenges, functional processes related to crop performance need to be better understood. Phenotyping complex traits such as water and nitrogen use efficiency in …
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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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