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 20 of 31 for “"Loam soils"”.
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Uptake of copper and cobalt by pumpkin (cucurbita maxima) and chinese cabbage (brassica oleracea) irrigated with contaminated water on sandy loam and clay loam soils.
… loading rates of heavy metals on sandy and clay loam soils and establish factors that influence transmission their uptake by pumpkin and Chinese cabbage when grown on sandy and clay loam soils when irrigated with water contaminated with Cu and Co. A green house study in which pumpkin and Chinese …
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Uptake of copper and cobalt by pumpkin (cucurbita maxima) and chinese cabbage (brassica oleracea) irrigated with contaminated water on sandy loam and clay loam soils.
… loading rates of heavy metals on sandy and clay loam soils and establish factors that influence transmission their uptake by pumpkin and Chinese cabbage when grown on sandy and clay loam soils when irrigated with water contaminated with Cu and Co. A green house study in which pumpkin and Chinese …
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Aspects of Some Compacted Campground Ameliorating Practices
… mechanical manipulation of compacted campground soils, with and without the addition of organic materials and the planting of grasses, had any long lasting effect on the amelioration of these deteriorated campsites. An attempt was also made to determine the natural recovery time for East Texas …
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Groundwater levels as affected by swine waste lagoons in high water table soils
… area typically has a high water table with sandy loam soils. There has been concern by state officials that these units could possibly cause contamination of groundwater in the surrounding area due to infiltration from the lagoons to the water table. The deep aquifer in this area is a good potable …
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Sorption of Cadmium, Copper, Lead, and Zinc as influenced by pH, ionic strength and selected soil components
Metals sorption in soils is influenced by several factors, including pH, ionic strength, the presence of ionic composition or organic ligands, total amount of metals, and adsorbent loading. These conditions should be considered when evaluating metal sorption capacity of soil material or when …
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Nitrogen and Sulfur Management in Soybean and Edamame Production in the Mid-Atlantic Coastal Plain
… We completed a study for soybean grown in sandy loam soils in the mid-Atlantic coastal plain system to determine proper S fertilizer rate and application timing. Yields ranged from 1,236-4,051 kg ha-1. Neither S rate nor application timing influenced yield. S treatments increased methionine …
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The Vascular Flora of Bona Glade Natural Area, Dade County, Missouri
… localities on the glade reveal very acid sandy loam soils which are relatively infertile. Bedrock is Pennsylvania Channel Sandstone. Some rare or endangered species, such as Geocarpon minimum, occur here. Studies of comparative growth rates and annual ring increments were made from …
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The determination of surface mine soil erodibility factors for two soils in southern West Virginia
… erodibility factors for two distinctly different soils in southern West Virginia. Other variables included in the study were detailed soil descriptions for each site, initial and final soil moistures, plot rainfall distributions and the particle size distributions of the eroded materials. The soil …
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Rivalry for nutrient resources : is there competition below ground between leguminous trees and grasses in a mesic and arid savanna in the Kruger National Park?
… on a mesic savanna (737 mm MAP) site on sandy-loam soils and an arid savanna (547 mm MAP) site on clay-rich soils in the Kruger National Park, South Africa. We show that most tree and grass roots are located in the upper layers of the soil and both are present to the bottom of the profile. Root …
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Trace Metal Concentrations across Trophic Levels in Cotton Fields of Xinjiang Province, China
… become concentrated in urban and peri-urban soils with the use of agricultural practices and industrial emissions. Fertilizers, liming, sewage sludge, and irrigation water contain metals which accumulate in agricultural fields and pose a risk to humans and wildlife. Coal plants and brickyards …
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Comparing simple and complex native forage mixtures for grazing cattle in southwestern Saskatchewan
… in 2006 on Chernozemic Orthic Brown Swinton Loam soils and consisted of 11 native and three tame monoculture species common to southwestern Saskatchewan. Clippings at a 5 cm stubble height occurred on June 20 and every 28 days after until October 10. Forage DM production, in vitro OMD, NDF, …
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Phosphorus Transport and Distribution in Kentucky Soils Prepared Using Various Biochar Types
… by day. Phosphorus transfer from agricultural soils is an important environmental issue that is being closely observed as the transport of phosphorous to water bodies is adversely affecting water quality due to accelerated eutrophication. It is important to establish phosphorous models that …
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Characterization of Watersheds on Fort Benning Military Reservation: Comparison of Field Data to Watershed Parameters
… studied were dominated by Nankin sandy clay loam soils, Troup loamy sand soils and Cowarts & Ailey soils types. Results showed that baseflow TSS was greatest in disturbed and urbanized catchments. The soil erodibility index maps produced in ArcGIS using the modified RUSLE equation indicate …
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A Tractor Mounted Device Used for Comparison of In-Situ Soil Bearing Capacity Between Two Tillage Regimes
… were performed in fields containing silty clay loam soils located about 2 miles northwest of Brookings, SD. The following conclusions were obtained for the soil bearing capacity and cone penetrometer tests. For com plots, a tilled soil exhibited significantly higher bearing capacities for all …
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The Effect of Preflood Nitrogen and Flood Establishment Timing on Rice Development, Nitrogen Uptake and Grain Yield
… and grain yield. Trials were established on silt loam soils at the Pine Tree Research Station (PTRS) and Rice Research and Extension Center (RREC) during 2015 and 2016. Urea-N was applied at 0, 45, 90, 135, and 180 kg N ha-1 on five to seven different dates with applications beginning near the …
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Investigations of White -Tailed Deer Infestation by Ixodes Scapularis on the Illinois River, USA
… to Castle Rock State Park, as well as with loam and gravelly loam soils, entisol and inceptisol soil orders, average temperature for the week prior to the hunt and deer sex and age status. Increasing trends in tick prevalence and intensity, coupled with the identification of new high …
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Estimating daily green leaf area index for corn in Virginia
… from corn plants grown on Davidson silty clay loam, Davidson silty clay, and Mayodan sandy loam soils in the Piedmont region of the State. Maximum and minimum temperature data were also collected at the three sites. Measurements were made for two growing seasons using corn hybrid Pioneer 3369A, …
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Laboratory Investigations of the Mechanisms of Groundwater Seepage Erosion and Piping in Cohesive Soils
… a constant-head soil box packed with sandy loam soils at prescribed bulk densities (1.30-1.70 Mg m-3) and an outflow face at 90. Bulk density controlled the mechanism of seepage erosion/failure. For both soils, tension failures occurred at densities less than 1.60 Mg m-3 and undercutting was …
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Methane Emissions from Direct-Seeded, Delayed-Flood Rice Grown on a Clay Soil
… have been collected from rice produced on clay soils in Arkansas. Therefore, research was conducted in 2012 and 2013 at the Northeast Research and Extension Center in Keiser, Arkansas to examine the factors affecting CH4 emissions from rice produced on a Sharkey clay (very-fine, smectitic, …
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Effect of organic matter and contact time on the sorption and bioavailability of chlorophenols
… distributed in the environment. Adsorption to soils may inhibit the transport of these chemicals, while slow desorption rates can create a potential source for long-term contamination of groundwater supplies. Microbial degradation of these compounds may also play an important role in their …
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