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 12 of 12 for “"coarse-textured soils"”.
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Utilization of carbon-rich waste materials to reduce pesticide movement to groundwater in a sandy coarse-textured soil
Pesticide use on coarse-textured soils frequently leads to groundwater contamination. Based on the fact that organic carbon is the primary contributor to pesticide sorption in soil-water systems, a resolution of this problem is anticipated through external application of organic carbon sources. In …
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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 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 decrease the value of C sequestration. Objectives of this research were: (i) …
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Effects of panicle removal and nitrogen on yield of grain sorghum
… in Botswana. It is often grown in low fertility, coarse-textured soils. It is a common practice within some ethnic groups in Botswana to remove the primary panicle with the expectation that this will increase the grain yield by promoting tillers. A factorial experiment was conducted in the …
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Nitrogen and Phosphorus Management in the Mid-Atlantic
… reduced loosely bound P compared to soils fertilized with non-amended PL in shallow soil samples. Overall, results from these studies offer insight into production practices that increase profitability and environmental stewardship in fresh market tomatoes by optimizing fertilizer and …
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Time And Rate Of Nitrogen Fertilization Influence Maize Nitrogen Use Efficiency And Soil Enzyme Activity
… and decreased over time, particularly in the coarse-textured soils at Becker. Although microbial activity declined annually, there was no significant change in glucosidase activity. There was a decline in acid phosphatase activity in coarse- but not finer-textured soils. At Becker, applying N …
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Hydraulic Properties Of Aggregated Oil Sand Material From The Athabasca Deposit
… considerable portion of these landscapes contain coarse-textured soils, which have poor water retention. Furthermore, many soils naturally contain oil sand, and little is known of its effects on the surrounding soils. The key objectives of this thesis were to assess the soil water repellency (WR) …
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Managing symbiotically-fixed nitrogen on mined land for tree crops
Young mine soils constructed following surface-mining for coal contain low levels of organic matter and nitrogen. It was hypothesized that nitrogen-fixing plants could be incorporated into a reforestation system in a manner that would meet the short term and long-term nitrogen needs of crop trees …
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Effects of Biosolids on Carbon Sequestration and Nitrogen Cycling
… (mainly N and P) and improve organic matter in soils, but the effects of biosolids on C sequestration and N cycling in the Mid-Atlantic region is not well understood. The objectives were: 1) to investigate soil C sequestration at sites with a long-term history of biosolids either in repeated …
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Effect of polyacrylamides on the physical properties of some light-textured soils.
… explain some field observations I made on some coarse sands in South Australia in 1999: that much of the irrigation water and nutrients applied to the sands under drip-irrigation simply passed through the root zone leaving the crops water-stressed shortly after irrigation events. There was …
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EVALUATION OF LAND, SOIL, WATER, AND VEGETATION-RELATED ECOSYSTEM SERVICES AND TRADEOFFS AT UTILITY-SCALE SOLAR PHOTOVOLTAIC FACILITIES
… shade from the solar array keeps the underlying soils cooler. Cooler soil temperature in PV arrays could be a buffer for plants during periods of drought, which implies that co-located systems could be implemented in ecosystem restoration projects for climate resilience. In addition to the …
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Nitrogen Cycling from Fall Applications of Biosolids to Winter Small Grains
… in equal grain yield and estimated N recovery in soils where N leaching loss risk was low, regardless of biosolids type or application strategy. Lime stabilized biosolids and biosolids/urea split N application increased grain yield and estimated N recovery in soils with high or moderate N leaching …
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Crop response to irrigation with acidic and neutralized, saline mine water
… soil types, as influenced by soil texture. Coarse-textured soils are typically easier to leach than fine-textured soils, hence, the model predicted that sandy loam soils would be less saline. The assessments indicated that increasing leaching fraction would have an influence on rootzone …