QUANTIFICATION OF DENITRIFICATION AND NIT ROUS-OXIDE PRODUCTION IN SOILS

This review deals with the microbiological and chemical phenomena invo lved in the denitrification and N2O emission processes in soils. The d ifferent methods of measurement, the major results of in situ measurem ents, and predictive models of denitrification and N2O emissions are d iscussed. Important areas of future research including methodological aspects, the need for knowledge concerning the spatial variability of high denitrification or N2O production activities, and the impact of a gricultural practices on these processes are described.