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 7 of 7 for “"nitrogen immobilization"”.
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The Role of Nitrogen Availability, Hydroperiod and Litter Quality in Root Decomposition Along a Barrier Island Chronosequence
… addressed how hydroperiod, litter quality and nitrogen availability influenced below ground root decay in response to gradients associated with site age and topographic position and in the context of a nitrogen limited ecosystem. Effects on rates of mass loss and nitrogen and phosphorus …
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The Influence of Switchgrass Establishment on Soil Organic Matter Pools in an Agricultural Landscape
… biogeochemical cycles, particularly carbon and nitrogen. Conventional row-crop agriculture 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 …
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Tannin geochemistry of natural systems: method development and application
… Schiff base reactions partially responsible for nitrogen immobilization. Measured molecular tannin was second in abundance only to carbohydrates in the senescent yellow leaves entering the estuarine system. Leaching losses of 30% tannin highlight the potential importance of tannin in dissolved …
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Effects of Elevated Atmospheric CO2 on Root Growth, Turnover and Decomposition in a Scrub Oak Ecosystem
… mass had been lost after 828 days. A period of nitrogen immobilization occurred in both fine roots and rhizomes in the elevated CO<sub>2 </sub>treatment, which is potentially a mechanism for nitrogen conservation for this system in an elevated CO<sub>2 </sub>world. Significant fine root …
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The effects of flame cultivation on the growth and nitrogen utilization of winter barley
… of seed bed preparation techniques at three nitrogen levels in a sandy loam to sandy clay loam soil in a 2 x 3 x 3 factorial experiment. Trials looked at stubble removal, crop growth and development, soil physical and chemical properties and soil and fertilizer nitrogen uptake using 15N …
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Optimizing Weed Suppression Via Cover Crop and Herbicide Programs in the Mid-Atlantic
… for specific goals, such as weed suppression and nitrogen fertilizer reductions. Waiting to terminate the cover crop until cash crop planting, so-called "planting green," is often part of the management and is an evolution from the traditional termination timing prior to cash crop planting. To …
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Chemical, Physical, and Biological Factors Influencing Nutrient Availability and Plant Growth in a Pine Tree Substrate
… grown in peat. Data in chapter four compares nitrogen (N) immobilization rates, substrate carbon dioxide (CO₂) efflux levels, and nutrient leaching in peat, PB, and PTS over time. Data from these studies indicated that more N immobilization occurs in PTS than in PB or peat and that the …