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Soil Nitrification And Mineralization Rates Along An Elevation Gradient In The Great Smoky Mountains National Park, Christopher James Rolison
Soil Nitrification And Mineralization Rates Along An Elevation Gradient In The Great Smoky Mountains National Park, Christopher James Rolison
Masters Theses
The Great Smoky Mountains National Park (GRSM) is an area sensitive to acid deposition. Although reports indicate there have been reductions of acid deposition in the eastern United States, water quality in streams has not recovered to perceived natural levels. Coupled soil biogeochemical processes of nitrification and nitrogen mineralization can acidify soil water and play a key role in the fate of nitrogen-based acid deposition and observed stream acidification. Characterizing nitrogen decomposition rates at different elevations improves our understanding of the potential effects of acid deposition and soil interactions with acid ions. Soil chemical properties and potential reaction rates for …
Trace Element Accumulation In Rice :Effects Of Soil Arsenic, Irrigation Management, Phosphate Application And Iron Oxide Amendment, Eric Michael Farrow
Trace Element Accumulation In Rice :Effects Of Soil Arsenic, Irrigation Management, Phosphate Application And Iron Oxide Amendment, Eric Michael Farrow
Masters Theses
A concern is growing over the accumulation of trace contaminants in rice, a plant which has been estimated to supply 50% of the caloric intake to the world's population. Contamination with arsenic (As) and other trace elements have been shown in many areas including the U.S. and rice intake poses a potential risk to human health. This research investigated the accumulation of selected trace elements including arsenic (As), selenium (Se), molybdenum (Mo) and cadmium (Cd) in as many as six rice cultivars and two control soils common to the south central U.S. A field study was completed to evaluate the …