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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 33 for “"Soil Cover"”.
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Nitrous oxide and methane emissions from denitrifying bioreactors with and without a soil cover
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2024-08-01
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Hydrogeochemical Evaluation and Impact of Remediation Design on Arsenic Mobility at Historical Gold Mine Sites
… Similar tailings sites have been cleaned up by covering the mine wastes with soil. However, the tailings at Montague and Goldenville have been weathering for at least 70 years, leading to a wide range of As-bearing secondary minerals which may dissolve under a soil cover, releasing As to local …
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Review of codes of practice for the design of box culverts for recommendation for South African Bureau of Standards (SABS)
… for each span are then plotted against the soil cover depth to illustrate the discrete load effect of the vertical earth load and live load on the culverts at varying fill height and to determine the relationship between the culvert geometry, soil cover depth and the applied load. The result …
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The Ecological Effects of Cattle Grazing on Reptiles and Small Mammals in a San Joaquin Valley Grassland
… methods appropriate to sampling reptiles (coverboards and pit fall traps) and small mammals (Sherman live traps) were used to determine species richness and abundance of these taxa. <em>Uta stansburiana</em> (side-blotched lizard) abundances were greatest on Ungrazed1 (Fall: 1.75±0.49 …
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A Reexamination of the Eastern Collared Lizard (Crotaphytus collaris collaris) in Arkansas
… structure, as indicated in the ground and canopy cover surveys. Present sites had a positive correlation with rock and soil cover and a negative correlation with CWD, vegetation, and canopy cover; whereas absent sites had a positive correlation with CWD, vegetation, and canopy cover and a negative …
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Finite element modeling of contaminant transport through confined disposal facilities
… constituents within the pore water of the dredge soils. However, these contaminants frequently seep back into the water from which the dredge was removed. The primary objective of this research was to modify the existing finite element program POLUT2D to evaluate the rate and quantity of …
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Effects of prescribed fire timing on vigor of sericea lespedeza in the Kansas Flint Hills
… frequency, SL stem length, SL seed production, soil cover, and plant species composition were measured along single, permanent 100-m transects in each burn unit. Treatment and measurement date influenced forage biomass and SL stem length (treatment × time). Forage biomass was not different (P ≥ …
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The Development of Karren Karst Forms on the Newala Limestone in Dry Valley, Shelby County, Alabama
… age. They occur on bedrock surfaces below athin soil cover and on pinnacles protruding above the soil.Karren range from simple, isolated forms, to complex groups.One form may grade into another as cover conditions vary, orthey may be superimposed because of a complete change in environment.Karren …
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3D SENSING APPROACHES FOR PRECISION AGRICULTURE: APPLICATIONS TO PLANT FEATURES CHARACTERIZATION AND TO WEED CONTROL IN MAIZE
… the capacity of these approaches to estimate soil cover, a critical driver that can indirectly indicate the degree of weed infestation. Proximal images demonstrated superior accuracy in estimating this phenomenon, achieving a coefficient of determination (R2) of 0.93, compared to UAV-acquired …
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A Measurement of Conservation Agriculture’s Effect on Nitrogen and Carbon Mineralization Rates for Agricultural Recommendations in Haiti’s Central Plateau
… farming systems on eroded and nutrient-poor soils. Implementation of Conservation Agriculture systems has proven effective at improving soil quality and crop yield in many areas of the world, including areas similar to those in Haiti. While most Haitian smallholder farmers are highly …
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Hydrogeo-Eco-Systems in Aquaba/Jordan - Coasts and Region
… and hydrochemical data. The nature of soil cover and aquifer whose physical properties enhance human impacts indicated the vulnerability of groundwater to pollution. This certainly threatens the marine ecology which forms the sink where the in-excess flow ends. The constructed digital …
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Strip-till flue-cured tobacco production in Virginia
… has brought new attention to the impact of cover crops used in conservation tillage on the nitrogen fertilization of tobacco. A two-year study conducted at the Southern Piedmont Agricultural Research and Extension Center evaluated a strip-tillage production system on agronomic performance of …
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Comparative effects of conservation tillage systems on selected soil properties and yields of groundnut(arachis hypogaea)
… in Zambia based on reported improvements in soil infiltration, moisture, soil carbon, microbial activity and reduced bulk density over time. However, the effects in groundnuts such as plant development, agronomic aspects such as biological nitrogen fixation and yields under conservation …
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Effect of dry wheat straw mulching and cowpea-maize intercropping on soil erosion and maize yield in Zambia
… along with complementary practices such as soil cover and crop diversity has become a better option to ensure sustainable food production and maintenance of environmental sustainability. A field study was conducted to evaluate the effect of dry wheat straw mulching and cowpea-maize …
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Comparative effects of conservation tillage systems on selected soil properties and yields of groundnut(arachis hypogaea)
… in Zambia based on reported improvements in soil infiltration, moisture, soil carbon, microbial activity and reduced bulk density over time. However, the effects in groundnuts such as plant development, agronomic aspects such as biological nitrogen fixation and yields under conservation …
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REAL TIME MONITORING OF VOLUMETRIC WATER CONTENT IN RECLAIMED MINE WASTE USING CONE PENETRATION - TIME DOMAIN REFLECTOMETRY
Reclamation soil covers over mine waste are designed to store water as a means of controlling water balance in order to support re-vegetation and minimize the net percolation of water into mine waste. Measurement of stored volumes of water in reclamation material is a critical element in monitoring …
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Karst water studies and environment in West Malaysia
… region, West Malaysia. The meso-topography, soil and vegetation cover of 13 plots, which encompass the range of weathering environments observed in the limestone hills, are described. Reports are also given on regular measurements of throughfall, litterfall, throughflow, subcutaneous flow, …
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Creating capabilities for sustainable smallholder agriculture: a systems perspective on innovation and the adoption of conservation agriculture in Kenya and Madagascar
… for smallholder farmers to address declining soil productivity and climate change. CA is a technology package based on 1) minimum soil disturbance; 2) permanent soil cover; and 3) maximum crop diversity through rotation/association. Claims about the potential benefits of CA for smallholder …
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An assessment of conservation agriculture adaption by smallholder farmers : a case of Goromanzi, Zimbabwe
… its benefits of promoting better crop yields and soil fertility in a sustainable way as a climate adaptation strategy. This study assesses factors influencing the adoption of conservation agriculture by smallholder farmers in Goromonzi District, Zimbabwe. The study focuses on the following …
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