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Denitrification is the most poorly constrained term in the nitrogen (N) budgets of northern hardwood forests due to extraordinary complexity in soil, hydrology and ecosystem processes. This anaerobic microbial process is controlled by the availability of oxygen (O2), nitrate (NO3−) and available carbon (C) and produces three end products; nitric oxide (NO), nitrous oxide (N2O) and dinitrogen (N2)...
Estimates of denitrification are one of the key uncertainties in the terrestrial nitrogen (N) cycle, primarily because reliable measurements of this highly variable process—especially the production of its terminal product (N2)—are difficult to obtain. We evaluated the ability of gas-flow soil core and 15N tracer methods to provide reliable estimates of denitrification in forest soils. Our objectives...
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