Agriculture, the Global Nitrogen Cycle, and Trace Gas Flux

Abstract

A review with 83 refs. An anal. of the overall global nitrogen cycle and anthropogenic perturbations to it suggest that the global cycle has been altered to a greater extent than has nitrous oxide, in that fluxes of nitrogen across ecosystem boundaries have more than doubled as a consequence of human activity. The dominant sources of change to the overall cycle are agricultural intensification and land-use change, particularly in tropical regions