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 9 of 9 for “"organic matter fractions"”.
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The Influence of Switchgrass Establishment on Soil Organic Matter Pools in an Agricultural Landscape
… accelerates the decomposition of soil organic matter, contributing to atmospheric carbon and declining soil fertility. Planting perennial warm season grasses is a useful management alternative to row crop agriculture because these species have been shown to be effective at increasing …
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Re-Os dating of algal laminites : reduction-enrichment of metals in the sedimentary environment and evidence for new geoporphyrins
… low concentrations of Re and Os in these organic-rich rocks. The unexpectedly low metal concentrations require an oxic interpretation of the kukersite depositional environment. Kukersites were likely rapid, shallow water deposits protected from grazing and burrowing by hypersalinity, …
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Multifunctional woody polycultures and their influence on soil organic carbon
… biodiversity, and carbon (C) sequestration. Soil organic matter fractions (particulate organic matter [POM], and potentially mineralizable N [PMN]), inherent soil and landscape factors were quantified on samples collected using plot- and grid-based approaches to understand their influence on soil …
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Soil Structure and Organic Matter Dynamics: Influence of Tillage and Soil Physical Properties
Understanding structural controls over soil organic carbon (SOC) dynamics might improve our ability to predict inconsistent tillage influences on SOC sequestration. This research investigated the influence of soil structure on SOC mineralization and SOC fraction dynamics. A laboratory incubation …
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Effect of rotation, organic inputs and tillage on crop performance and soil quality in conventional and low-input rotations in central Iowa
… to be driven by the amount and placement of organic residues and to fluctuate with tillage and cropping phase. On a system basis, particulate organic carbon (POM-C) and potentially mineralizable nitrogen (PMN) were increased in both LEI rotations relative to a two year (2-yr) corn (Zea mays …
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The partitioning and mobility of metals in the Blesbokspruit
… from the following five operationally defined fractions: the exchangeable fraction, sensitive to changes in ionic concentration; the pH- sensitive bound to carbonates fraction; the redox-sensitive bound to Fe and Mn oxides and bound to organic matter fractions and essentially inert and …
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Nutrient fluxes and soil microbial processes
… 81 ha catchment. Soil chemical properties (soil organic matter, pH, cation exchange capacity, base saturation, exchangeable cations), soil microbial activities (net N mineralization, potential nitrification, basal respiration) and microbial biomass (microbial biomass C and N) were measured under …
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Legume integration and nutrient management impacts on soil health and cropping system productivity
… cropping systems, especially when combined with organic nutrient inputs, holds great promise for supporting soil health. However, legume performance and potential contributions to soil health, likely depend on legume species, management practices and inherent soil properties. The research …
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Physical and Chemical Parameters of Common Soils in the Central Plateau Region of Haiti
… This study was conducted to a) evaluate organic matter and nutrient stocks of various soils in the Central Plateau region, along with other chemical and physical characteristics and b) to evaluate the phosphorus-scavenging ability of commonly-grown crops to isolate those that may benefit …