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 15 of 15 for “"top soil"”.
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Rainfall trends in India and their impact on soil erosion and land management
… on the impact that climate trends may have on soil erosion and contaminant transport in India and examined the potential for top soil management practices to improve or maintain soil quality. Historical rainfall data from 50-135 years and extreme temperature data for 103 years were analysed and …
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Weathering Regimes and Pedogenic Variability on Large Boulders, Karkevagge, Northern Scandinavia
… (1) Clay content was marginally greater in soils developed on garnet-mica-schist than mica-schist; (2) Silt and clay content did not reflect eolian sediment input; (3) Soils that have formed on boulder tops are characterized as residual soils; (4) Deeper soils had developed overlying …
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Multipass effects of wheel and track type vehicles on soil compaction
… moisture level, and their interactions on soil compaction. During the study two procedures commonly used for soil bulk density determination were also compared. Treatments at the following levels were applied: i) Soil moisture: Two levels ii) Vehicle type: wheel and track type iii) Traffic …
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The effect of water storages on temporal gravity measurements and the benefits for hydrology
… components, namely groundwater, saprolite, soil, top soil and snow storage. The monitoring system comprised also a suction-controlled, weighable, monolith-filled lysimeter, allowing an all time first comparison of a lysimeter and a gravimeter. Lysimeter data were used to estimate WSC at the …
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Spatial variability of hydraulic properties as affected by physical properties of selected soil types in South Africa
Soil hydraulic and hydraulic-related physical properties are key to soil productivity and these properties are widely studied. Nevertheless, their spatial variability is least understood. Two sites were selected for this study (University of Venda Experimental farm and Roodeplaat, Agricultural …
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Preliminary report on the geology of Colgrove Butte, Hettinger County, North Dakota
<p>Colgrove Butte is a flat-topped erosional remnant with a cap of rock area of approximately 0.845 square miles, rising about 200 feet above the surrounding Missouri Plateau in northwestern Hettinger County, North Dakota. Its upper portion consists of flat lying fresh water deposits of White River …
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Controls on the Spatial-temporal distribution of soil moisture under snow dominated conditions in a naturally vegetated, sub-alpine mountain catchment
Soil moisture processes in the top soil is a pivotal element in the terrestrial phase of the hydrologic cycle over a wide range of scales. At the plot scale, soil moisture exerts a strong control on runoff, evapotranspiration, and the transfer of water to deeper soil levels and aquifers. It affects …
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Controls on the Spatial-temporal distribution of soil moisture under snow dominated conditions in a naturally vegetated, sub-alpine mountain catchment
Soil moisture processes in the top soil is a pivotal element in the terrestrial phase of the hydrologic cycle over a wide range of scales. At the plot scale, soil moisture exerts a strong control on runoff, evapotranspiration, and the transfer of water to deeper soil levels and aquifers. It affects …
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Impact Of Timber Harvest On Mercury Mobilization In A Mixed Pine And Hardwood Forest And Adjacent Lake In Mississippi
… Hg mostly accumulates in the upper layer of soil, where associates with organic matter. This top soil is exposed after clear-cutting and thus more susceptible to runoff. Harvest may also change the net balance between Hg methylation and demethylation by microorganisms through changes in redox …
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Optimizing non-flooded landscape units to support maize production in the Zambezi region, Namibia
… of these non-flooded landscape units in terms of soil and climatic factors as well as their land suitability for maize production in space and time given the prevailing climatic conditions has not been investigated. At the same time our understanding of how small-scale farmers in the region …
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Switchgrass potential on reclaimed surface mines for biofuel production in West Virginia
… due to its high biomass production on marginal soils, its tolerance of harsh growing conditions, and its ability to provide habitat for wildlife and soil conservation cover. West Virginia contains vast expanses of reclaimed surface mine lands and could potentially benefit from the production of …
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The Analysis Of Preserved And Degraded Human Skeletal Material: Understanding Relationships Between Bone And The Soil Environment
The relationship that soil interred human bone has with the burial environment has implications for the survival of the organic and inorganic components, including collagen and DNA. The study of both the Chapel House Farm Medieval cemetery, Poulton, Cheshire, UK, and contemporary skeletal remains …
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Hydrologic Response to Conifer Removal and Upslope Harvest in an Encroached Montane Meadow
… plan implemented by the Collins Pine Company. Soil moisture sensors at one foot below the ground and water table depth sensors at four feet below ground were installed in Marian Meadow and a control meadow in September 2013, with additional soil moisture sensors at three-foot depth installed …
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Factors possibly inhibiting growth of herbaceous plants in the understories of Eucalyptus cinerea
… investigations of ecophysiological parameters of soil water potential, soil nutrient levels and shading failed to account for suppression of understorey species. Their studies have shown that suppression of herbaceous layer species beneath the canopy of E. baxteri appear to be of an allelopathic …