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 18 of 18 for “"Soil water retention"”.
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Quantification of wildfire-induced perturbations to soil-water retention curves and their impact on rainfall runoff
… to these hazards requires understanding which soil properties are most strongly affected by wildfire and what role these changes play in runoff generation and debris-flow initiation. Previous studies have shown significant post-fire perturbations to saturated hydraulic conductivity (Ks) and …
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Transient Seepage Analysis for Levees and Dams: Numerical and Monitoring Approaches
… block sensors were used to monitor the pore water pressures in the embankments. It was found that when measuring the field soil water retention, tensiometers were more responsive than porous block sensors at low suctions; although, at shallower depths, the tensiometer performance was limited …
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An Experiment Assessing the Potential for Compost-Amended Lawn Topsoil to Inhibit Storm Quickflow
… This makes increasing surface infiltration and soil water retention in urban areas a matter of high importance. Lawns, forming a substantial fraction of suburban space, are a potentially useful medium in this regard. Four lawn test plots were constructed by the Toronto and Region Conservation …
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The long-term effect of elevated CO₂ on grassland biomass production
… CO₂ source, plant nutrient analyses (N and P), soil moisture contents (which could have an effect on plant wateruse efficiency) and carbon isotope discrimination values were determined at the three sites. The results show that elevated CO₂ had a significant effect on the monocotyledenous dry …
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Experimental and numerical analysis of behaviour of the myxospermous seeds of Capsella bursa-pastoris (L.) Medik. (shepherd’s purse) in soil
… plant species adapted to surviving in arid sandy soils. The seed mucilage is composed of polysaccharides, which are capable of absorbing large volumes of water and it has been shown to be of significant ecological importance in terms of seed dormancy, germination and dispersion. However, the …
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Assessment of the impact of climate change on an instrumented embankment: an unsaturated soil mechanics approach
… comprises embankments and cuttings built with soil material in an unsaturated state that is exposed to the climate. The BIONICS project (BIOlogical and eNgineering Impacts of Climate change on Slopes) aims to investigate how climate change will affect the serviceability and safety of earth …
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Quantification of short term interactions between soil and fungi
… and quantify short-term interactions between soil-borne fungi and soil. The quantification captures interactions between the ubiquitous soil saprotroph and plant pathogen <i>Rhizoctonia solani</i>, and a sandy loam soil, over a period of five days. The literature review provides evidence of …
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Estimating scale dependence of saturated hydraulic conductivity in soils
… of scale on hydraulic and physical properties of soils has broad applications to scaling problems in hydrogeology, soil physics, and environmental engineering. The scale dependence of flow and transport is attributed to spatial heterogeneities, such as pore-size distribution and pore connectivity …
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Restoration of Eroded Lands with Biochar as Soil Amendment in South Dakota
… improve physical and hydrological properties of soil. This study assesses the impact of biochar on soil organic carbon, physical and hydrological properties of two landscape positions under a corn (Zea mays L.)-soybean (Glycine max L.) rotation. Three types of biochar including corn stover, …
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Impacts of Crop Residue and Cover Crops on Soil Hydrological Properties, Soil Water Storage and Water Use Efficiency of Soybean Crop
… residue play a multifunctional role in improving soil hydrological properties, soil water storage and water use efficiency (WUE). This study was conducted to better understand the role of crop residue and cover crop on soil properties and soil water dynamics. The study was conducted at the …
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Long-term Impacts of Annual Cattle Manure and Fertilizer on Soil Quality Under Corn-Soybean Rotation in Eastern South Dakota
… and beef manure have been used to enhance soil quality; however, their impacts under long-term application in corn-soybean rotation need to be evaluated. Nutrient based recommended rates of manure applications on soils are important and also need to be monitored. This study, therefore, was …
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Reflective mulch effects on the grapevine environment, Pinot noir vine performance, and juice and wine characteristics
… (CG) recycled crushed glass. A control of bare soil was also included. MS and CG were light coloured while GG and CON were dark. Treatments were applied randomly within each of three replicates. Soil parameters tested were temperature, moisture, microbial biomass carbon, dehydrogenase enzyme …
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Forest Productivity as a Function of Root Growth Opportunity
… are usually complex interactions between soil properties and tree species. We used a 7 by 7 factorial greenhouse experiment to create a matrix of bulk density ((Ï b)) and volumetric water content (θv) to determine soil compaction effects on seedling growth of: (i) ponderosa pine (Pinus …
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Hydrodynamic characterisation of soil subsurface flows for water conservation purposes.
… focuses on the hydrodynamic characterisation of soil subsurface flows using developed new soil column experimental setup to assess the hydraulic parameters of unsaturated soil in the laboratory. The soils in the inland valley of Nigeria's Niger Delta, where agriculture uses more than one-third of …
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Assessment of the supply chain and factors influencing consumer decisions to purchase bean-based processed products in Lusaka province of Zambia.
… plants due to their benefits, such as enhancing soil aggregates, increasing soil water retention, and demonstrating robust adaptive capacities in adverse environments. Despite the advantages of legumes, many small-scale farmers engaged in their production neglect value addition, resulting in …
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Assessment of the supply chain and factors influencing consumer decisions to purchase bean-based processed products in Lusaka province of Zambia.
… plants due to their benefits, such as enhancing soil aggregates, increasing soil water retention, and demonstrating robust adaptive capacities in adverse environments. Despite the advantages of legumes, many small-scale farmers engaged in their production neglect value addition, resulting in …
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Measurement of Soil and Water-Quality Parameters to Understand Subsurface Transport Processes
… transport dynamics in saturated and unsaturated soils. In the first phase of this study, we have focused on understanding the impacts of climate change driven hydrological processes such as excess rainfall and/or draught cycles on saltwater intrusion processes with a focus on managing freshwater …
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Feeding the soil to feed the planet: soil health outcomes from novel amendments to residue management
Healthy soils are the foundation for the continued capacity of agricultural lands to supply essential ecosystem services while also meeting demands for food, fuel and fiber. From academia to policymakers and other key stakeholders, attention towards soil health continues to rise due to global …