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 23 for “"nutrient leaching"”.
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The effects of winter cover cropping on nutrient leaching through repacked soil columns
… practice with the potential to decrease nutrient transport from agricultural fields, which consequently reduces nutrient loading to water bodies, eutrophication, hypoxia, and degradation of local ecosystems. This study utilized laboratory-scale soil columns and the one-dimensional water …
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Treatment of Rainbow Trout <i>(Oncorhynchus mykiss)</i> Raceway Effluent Using Baffled Sedimentation and Artificial Substrates and Characterization of Nutrient Leaching Rates from Settled Rainbow Trout (Oncorhynchus mykiss) Sludge
… of particulate fractions. Dissolved nutrient removal (ortho-phosphate (OP), total ammonia nitrogen (TAN), nitrate, nitrite, and total organic carbon (TOC)) was not consistent throughout the basin and did not improve when the Aquamats® were installed. A short contact time and …
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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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COMPOST QUALITY RECOMMENDATIONS FOR REMEDIATING URBAN SOILS
… compost could potentially increase the risk of nutrient loss through leaching and runoff. The objective of our study was to consider the effects of different compost amendments on soil health, plant health and susceptibility to nutrient leaching. We conducted a bioassay to measure the effects of …
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Water and nutrient transport dynamics during the irrigation of containerized nursery crops
… 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 throughout crop production seasons, leaving little known about water and dissolved …
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EFFECT OF COVER CROPS ON NUTRIENT DYNAMICS AND SOIL PROPERTIES IN CORN-SOYBEAN ROTATION IN SOUTHERN ILLINOIS
… 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 loss during winter fallow period is the use of cover …
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No-Till Vegetable Production at the Cal Poly Organic Farm
… bare soil have been linked to erosion, nutrient leaching, reduced biological diversity, loss of organic matter, and release of CO2 into the atmosphere (Brady and Weil, 2004). The usefulness of an organic no-till system for transplanted vegetables was explored over two growing seasons. In …
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Next generation dairy systems for Canterbury: A dissertation submitted in partial fulfilment of the requirements for the Degree of Bachelor of Agricultural Science with Honours at Lincoln University
… preform under tougher council regulations and nutrient leaching limit caps. This trial compared two different farming systems with the aim to reduce environmental foot print. The two systems where High Stocking rate Efficient (HSE) (5 cows/ha) and Low Stocking rate Efficient (LSE) (3.5 cow/ha). …
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Technological Innovations for Mid-Atlantic Cropping Systems
… biomass is established to reduce erosion and nutrient leaching. Satellite imagery was able to estimate multi-species cover crop biomass more accurately than field-based sensors, although the most accurate vegetation index was dependent upon which satellite was being tested. Chapter three …
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Chemical, Physical, and Biological Factors Influencing Nutrient Availability and Plant Growth in a Pine Tree Substrate
… work was to determine the factors influencing nutrient availability in PTS compared to PB or peat substrates. Chapter two reports data on the response of japanese holly and azalea to fertilizer rate when grown in PTS and PB. This study demonstrated that an additional 2.4 kg·m-3 of Osmocote Plus …
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Optimizing Phytoremediation to Enhance Treatment Efficiency of Suspended Raingardens
… stormwater pollutants such as suspended solids, nutrients, heavy metals, and emerging contaminants. To achieve the objective, the present study was conducted in two stages. The first stage involved a laboratory-scale unplanted column study to investigate nutrient leaching occurrence in several …
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Characterization and agronomic evaluation of biochar amendments in a midwestern loam soil: effects on soybean yield, soil nutrient retention, and leachate quality
… results for improving soil fertility, enhancing nutrient retention, and mitigating environmental degradation in agroecosystems. This dissertation investigates the physicochemical properties of biochar derived from different feedstocks and thermochemical processes, and evaluates their short-term …
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The Impact Of Nitrogen Fertilization On The Physico-Chemical, Functional, Amino Acid Profile, Protein Secondary Structure, And Bread Properties Of Intermediate Wheatgrass.
… services such as reduced soil erosion, lowered nutrient leaching to groundwater, and improved carbon sequestration. It has higher protein, dietary fiber, and ash. It is one of several perennial crops available for potential food use and the first commercially viable perennial grain in the United …
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Perennial pathways: Planning and establishment practices for edible agroforestry
… agriculture, and greenhouse gas emissions and nutrient leaching remain somewhat problematic. In chapter 1, we examine current organic and conventional agriculture systems and suggest that agroforestry, which is the intentional combination of trees and shrubs with crops or livestock, could be …
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Identifying targets for multifunctional perennial cropping systems implementation through a landowner adoption preferences survey and a spatial suitability analysis
… accelerates instances of soil erosion and nutrient leaching. Multifunctional land use strategies are needed to mitigate environmental impacts and as well as information tools to facilitate their implementation. Considering both farmer motivations and rural development needs, one option is …
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Quantifying Greenhouse Gas Emissions and Ammonia Volatilization from Soil Amended with Excreta from Ruminants Fed Alternative Forage-based Diets
… excreta from ruminants fed supplemented diets on nutrient leaching through the soil profile, microbial community composition, and soil structure should be performed. Alternative diet supplementation strategies on N allocation in the ruminant should be assessed including use of condensed tannin and …
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Microbial and Chemical Affects on Leachate from Calcareous Soils Treated with Wastewater Effluent
Increasing human populations are placing greater strain on water resources, prompting the use of treated wastewater effluent for irrigation in some areas, including the desert regions of the Western United States. To determine the potential effects of using secondary effluent for irrigation, we …
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Transformation of Carbon, Nitrogen and Phosphorus in Deep Row Biosolids Incorporation-Hybrid Poplar Plantation in Coastal Plain Mined Land Reclamation Sites
… of the extremely high application rates used. Nutrient additions in excess of the vegetation requirements, especially in coarse-textured soils, can potentially impair water quality. Increasing C and N additions with biosolids DRI can also generate emissions of greenhouse gases N₂O and CH₄ and …
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Irrigation scheduling: a soft adaptor to weather uncertainties and irrigation efficiency improvement initiatives
… can contribute to conserve water and reduce leaching of nutrients. During the shoulder seasons (September – October and March – May) current irrigation strategy leaves sufficient space for potential rain. However, during the peak irrigation season (November - February), the majority of …
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