Soil denitrification is an ecologically important nitrogen removal mechanism that releases to the atmosphere the greenhouse gas N 2 O, an intermediate product from the reduction of NO 3 À to N 2 . In this study we evaluate the relationship between soil carbon and denitrification potential in watersheds with bedrock acting as a nonpoint source of nitrogen, testing the hypothesis that nitrate leaching to stream water is in part regulated by denitrification. Two sites, one in a Mediterranean climate and the …
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