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 35 for “"Organic Soil"”.
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Intervention Strategies for Escherichia coli O157:H7 and Salmonella in Organic Soil and on Fresh Produce
… which can be inadvertently contaminated by soil. Therefore, there is a need to control microbial loads in soil to minimize contamination. The objectives of this study were to evaluate the antimicrobial activity of cinnamaldehyde, Ecotrol®, eugenol, Sporan® and acetic acid against E. coli …
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Multiple Storm Event Impacts on Epikarst Storage and Transport of Organic Soil Amendments in South-Central Kentucky
… karst areas is susceptible to contamination from organic soil amendments and pesticides. During major storm events during 2011, dye traces were initiated using sulphorhodamine-B, fluorescein and eosine in a groundwater recharge area where manure was applied to the ground. Fecal coliform samples …
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Effects of Organic Soil Amendments on Soil Physiochemical and Crop Physiological Properties of Field Grown Corn (Zea mays) and Soybean (Glycine Max)
… The presence of humic substances in composted organic amendments may increase crop tolerance to water stress through their hormone-like effects on plant metabolism. The objectives of this study were to calculate N mineralization rates of composted and non-composted organic materials used in …
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The effects of land use, temperature and water level fluctuations on the emission of nitrous oxide (N2O), carbon dioxide (CO2) and methane (CH4) from organic soil cores in Iceland
Agricultural practices can affect soil microbial production and emission of the major greenhouse gases (GHG’s) nitrous oxide (N2O), carbon dioxide (CO2) and methane (CH4). The purpose of this study was to gain insight into the influence of temperature, water level and water level fluctuations on …
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Effects of Experimental Scale on the Adsorption of Two Pharmaceutical Drugs Detected in Municipal Wastewater Effluent
… groundwater, and municipal drinking water. Soil aquifer treatment (SAT) is a promising method for treating these emerging compounds through combined adsorption and degradation of target compounds in soil. This thesis examines the consistency of results from typical studies like adsorption …
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Effect of Concentration of Sphagnum Peat Moss on Strength of Binder-Treated Soil
Organic soils are formed as deceased plant and animal wildlife is deposited and decomposed in wet environs. These soils have loose structures, low undrained strengths, and high natural water contents, and require improvement before they can be used as foundation materials. Previous researchers have …
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Management strategies for control of soybean cyst nematode and their effect on the nematode community
… nematode community is a useful bioindicator for soil health. In chapter 1, relevant research is reviewed. Chapter 2 describes experiments testing ten organic soil amendments at various rates for SCN control in the greenhouse. Some amendments-particularly canola meal, pennycress seed powder and …
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Hydrogeochemical Evaluation and Impact of Remediation Design on Arsenic Mobility at Historical Gold Mine Sites
… 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 waters. The challenge of …
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Heavy metal redistribution in soils using compost as a soil amendment
Organic soil amendments such as compost can reduce the availability of heavy metal contaminated soil. The objectives of this study were (1) to evaluate the efficiency of compost as an soil amendment within heavy metal contaminated soil; (2) to determine the hypoaccumulation of heavy metals in the …
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A preconcentration-spectographic method for the determination of trace elements in plant materials and the application of the biogeochemical method at the Silver Mine lead deposit Cape Breton, Nova Scotia
… of the composition of large numbers of plant and soil samples were established.Samples collected along one line during biogeochemical and pedogeochemical investigations over a glaciated lead-silver sulphide deposit at Silver Mine, Cape Breton Island, were used to test the method. The mineralized …
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Influence of organic matter on the sorption and bioavailability of 2,4,6-trichloro-(¹⁴C)-phenol
Hydrophobic organic contaminants released into the subsurface can become sorbed to the soil matrix. The sorbed compounds may slowly leach into the groundwater, providing a long-term source of contamination. Bioremediation has been cited as a potential clean-up strategy for residual organics in …
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SIMPLE ORGANIC FERTILIZER AMENDMENTS FOR FARMING IN DEGRADED SOILS: EFFECTS ON PLANT-MICROBE INTERACTIONS
<p>The rapid loss of topsoil, biodiversity, and water quality across agricultural land in the United States and the industrialized world poses some of the most important risks to the future of global and domestic food security. Not only is arable land being lost at an unsustainable pace, but the …
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A study of basidiomycetes isolated from coarse woody debris and contiguous soil horizons in a mixed deciduous-conifer forest in New Hampshire, United States of America
… (Fr.) Quel., links the mineral (BC & E) and organic (Oe) soil layers to decomposing coarse woody debris (CWD) in a northern hardwood forest. This link supports the possibility that energy stored in woody debris can facilitate the vertical transfer of elements and compounds within the soil …
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Effect of reconstituted method on shear strength properties of peat
Peat is an organic soil contains more than 75% organic content. Shear strength of the soil is one of the most important parameters in engineering design, especially during the pre-construction and post-construction periods, since used to evaluate the foundation and slope stability of soil. Peat …
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The Effects of Agricultural Waste-Based Compost Amendments in Organic Pest Management
<p>Soil-borne pests and pathogens, such as <em>Verticillium dahliae</em>, can devastate a wide range of annual and perennial crops. Current management options for organic production are limited and sustainable management of pathogens, weeds, and arthropods is important for staying profitable and …
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Management of Alum-Treated Poultry Litter
… or exchangeable Aluminum (Al) content in treated soils. Two, 3-yr field trials with corn (Zea mays L.) were used to show that, when applied at rates based on current litter management strategies, ATPL resulted in yields similar to those achieved through applications of non-treated poultry litter …
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Dissolved Organic Matter Sources from Soil Horizons with Varying Hydrology and Distance from Wetland Edge
… dynamics, particularly regarding dissolved organic matter (DOM) transport and transformation. The organic matter (carbon) that accumulates in wetland soils may be released into water, generating DOM. DOM is mobile and reactive, making it influential to aquatic metabolism and water quality. …
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Geochemical changes, plant growth and ecosystem recovery in soils after high temperature remediation
… remediation can effectively remove toxic organic compounds from contaminated sites, opening them up for re-development or environmental enrichment. However, these treatments generate elevated temperatures in the soil (40-1200°C) that may impact its quality, particularly its ability to …
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Evaluating dNBR and CBI for Fire Severity Estimation in Fennoscandian Boreal Surface Fires
… dNBR reflects fire effects on both canopy and soil strata. Additionally, I also evaluate the level of alignment between dNBR and CBI, and the performance of CBI as a ground-based reference for fire severity assessment in this region. Results reveal that dNBR underperforms in estimating fire …
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Development of soil lead and tree-ring methods for characterizing atmospheric deposition gradients and subsequent tree growth responses
… I measured the lead (Pb) content of forest soils adjacent to atmospheric deposition monitoring stations throughout the central Appalachian Mountains to examine how well patterns of soil Pb relate to regional patterns of inorganic nitrogen (N) deposition. While I found no significant …
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