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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 35 for “"silt-loam soil"”.
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Methane Emissions and Ammonia Volatilization from Drill-Seeded, Delayed-Flood Rice on a Silt-Loam Soil in Arkansas
… investigate trace gas emissions from rice on a silt-loam soil, including CH4 emissions as influenced by nitrogen (N) fertilization (i.e., optimal N and no N) in 2011, and previous crop [i.e., soybean (Glycine max L.) or rice] and cultivar (i.e., semi-dwarf, standard-stature, and hybrid) in 2012, …
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The mobility of malathion in a silt loam soil as affected by phosphate and naturally occurring organic acids
… study of the mobility of Malathion in the soil environment was conducted.
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Correlation Analyses among Soil, Plant, and Environmental Variables and Greenhouse Gas Emissions from Furrow-irrigated Rice on a Silt-loam Soil
… to relate greenhouse gas (GHG) production to soil and plant properties or environmental factors under furrow-irrigated rice. The objective of this field study was to evaluate correlations between methane (CH4), nitrous oxide (N2O), and carbon dioxide (CO2) fluxes and emissions and global …
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Denitrification in low pressure distribution onsite wastewater disposal systems
… The treatments were surface and subsurface soil horizons; nitrified and non-nitrified wastewaters; 0.5, 1.0, and 1.5 times the Virginia Department of Health (VDH 1989) recommended wastewater loading rate; 24 and 48 hour dosing intervals; and summer and winter temperatures. Surface and …
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Simulation of concentration effects on mobility and persistence of alachlor
… investigation was divided into two components: soil column study and model study. In the soil column study, PVC pipe was hand packed to a depth of 30 cm with Catlin silt loam soil. The surface of the soil columns was contaminated with alachlor at rates of 3, 30 and 3000 kg a.i./ha. Columns were …
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Irrigation management effects on nitrate leaching and mowing requirements of tall fescue
… were conducted on tall fescue growing on a Chase silt loam soil near Manhattan, Kansas. Each experiment was arranged in a split-plot design, with irrigation treatments applied to whole plots: 1) frequency-based irrigation, water was applied three times weekly to deliver a total of 19 mm water wk⁻¹ …
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The Neubauer method as a means of determining the phosphorus requirements of certain Virginia soils
… various fertility elements on the Norfolk sandy loam soil type at Williamsburg, Virginia. The yields of corn grown on the Hagerstown silt loam soil type at Blacksburg, Virginia, correspond closely to the fertilizer treatments and their availability. The milligrams of phosphorus absorbed by rye …
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Size fractionation of bacterial functional diversity within soils
… B horizons of cultivated and forested Guernsey silt-loam soil without enrichment and following enrichment in dilution culture. Without enrichment, SC exhibited limited substrate utilization compared with LC. B horizon SC failed to positively utilize any carbon substrates, which suggests that …
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Mungbean [Vigna radiata (L.) Wilczek]: Protein-rich Legume for Improving Soil Fertility and Diversifying Cropping Systems
Drought, salinity, and low soil fertility have negative impacts on agricultural productivity, resulting in food scarcity and nutritional insecurity, particularly in Sub-Saharan Africa. Mungbean [Vigna radiata (L.) R. Wilczek] has seen increased interest as a short-duration and drought tolerant …
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Soil quality in organic cropping systems
The objective of this research was to quantify soil quality indicator levels under contrasting organic practices and to provide scientific information that can lead to development of best management practices for organic no-till and transitioning to organic production. Four studies examining crop …
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A study of infiltration trenches in unsaturated soil
… a study of infiltration trenches in unsaturated soil. The infiltration rates and the water content distributions in soil calculated by Fok's model and a finite-difference model are compared for both the Ida silt loam soil and the Webster clay loam soil considering the capillary zone effect due to …
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Effects of soil moisture and al-nitrilotriacetate on yeild chemical composition and digestibility of ryegrass (Lolium multiflorum, L.) by meadow voles
… was grown in a greenhouse experiment on Bucks silt loam soil with two soil moisture levels (flooding and 80% field capacity) and two Al rates (0 and 135 mg/kg) as Al-NTA. Flooding increased Al, Fe, Cu, Ca and fiber and decreased dry matter yield, Mg, K and Zn concentrations. Treatment with 135 …
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Influence of HLB of polysorbate surfactants on mobility of methazole in plants and soil
… of methazole-¹⁴C in Landisburg-Greendale silt loam soil was examined. When the herbicide was applied with surfactants (1:4, w/w, all HLB values), leaching of methazole was not affected. However, ratios of 1:1 and 4:1 (herbicide/surfactant) caused slight and significant retardation of …
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The effect of fast pyrolysis biochar made from poultry litter on soil properties and plant growth
… effect of biochar created from poultry litter on soil properties and plant growth. Five studies were conducted using biochar made by the fast pyrolysis of poultry litter. Two were greenhouse studies and three were field studies. The greenhouse studies were conducted with a sandy loam soil and a …
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Field Measurements of Denitrification From Fertilizer Applied to Turfgrass
… was applied to replicated plots on a Flanagan silt loam soil under Kentucky bluegrass (Poa pratensis L.) or creeping bentrgrass (Agrostis palustris Huds). Atmospheric samples were collected daily (data extrapolated to a 24-h period) for the duration of each experiment and analyzed by mass …
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Evaluation of Soybean Maturity Group and Planting Date in a Soybean-Rice Rotation on Overall Crop Productivity
… (Glycine max L.) management techniques on soil-nitrogen (N) credit development and its impact on the subsequent rice (Oryza sativa L.) crop’s success. This study was conducted to determine how soybean maturity group (MG) and planting date effect overall soybean productivity and its …
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Soil conditioner effects on soil erosion, soil structure and crop performance
Previous work has suggested that soil conditioners can provide environmentally beneficial aids to agriculture and soil conservation. To investigate this further, studies were carried out on soil conditioner effects on soil erosion, soil structure and crop performance. The main soil conditioner …
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Efficacy of Herbicide Combination on Burley and Dark-Air Cured Tobacco
… June 2, 2000 in a conventionally tilled Pembroke silt loam soil with a pH of 6.5 and organic matter content of 12 g/kg. Herbicide treatments were applied on June 1, 2000 with a CO2 backpack sprayer. Six treatments were applied to both burley and dark air-cured plots. Sulfentrazone was applied …
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Groundcover Management System and Nutrient Source Impact Physical Soil Quality Indicators in an Organically Managed Apple Orchard
… were implemented for their ability to alter the soil physical condition of a newly established, organically managed apple (Malus x domestica Borkh.) orchard. Annual applications of municipal green compost (GC), shredded office paper (SP), wood chips (WC), and mow-blow (MB) grass mulch were …
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