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Recent research has dramatically advanced our understanding of soil organic matter chemistry and the role of N in some organic matter transformations, but the effects of N deposition on soil C dynamics remain difficult to anticipate. We examined soil organic matter chemistry and enzyme kinetics in three size fractions (>250 μm, 63–250 μm, and <63 μm) following 6 years of simulated atmospheric...
Anthropogenic perturbations to the global nitrogen (N) cycle nowexceed those to any other major biogeochemical cycle on Earth, yet ourability to predict how ecosystems will respond to the rapidly changing Ncycle is still poor. While northern temperate forest ecosystems haveseen the greatest changes in N inputs from the atmosphere, other biomes,notably semi-arid and tropical regions of the globe, are...
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