eng International Academy of Ecology and Environmental Sciences Computational Ecology and Software 2220-721X 2016-12-1 6 4 139 149 3 article A Biswal 1 2 KK Choudhury 1 2 P Venkat Raju 1 2 MVR Sesha Sai 1 2 Agricultural Sciences Application Group, RSAA, National Remote Sensing Centre, Hyderabad 500037, India Water Resources Division , RSAA, National Remote Sensing Centre, Hyderabad 500037, India The denitrification decomposition (DNDC) model is a process-based computer simulation model of soil carbon and nitrogen biogeochemistry. The DNDC model is one of the few process-based bio-geo chemical crop simulation models for which both a site-specific mode and a regional mode were developed. For regional mode, a region is presented in a typical Geographic Information System (GIS) consisting of many polygons or grid cells. The database consists of spatially differentiated information of location, climate, soil properties, cropping systems, and farm management practices for each polygon or grid cell for the entire modeled region. An attempt was made to establish the methodology for the estimation of soil greenhouse gas fluxes like CH4, CO2 and N2O on a sub-basin scale. http://www.iaees.org/publications/journals/ces/articles/2016-6(4)/application-of-process-based-biogeochemical-model-DNDC.pdf DNDC GIS Bio-geo chemical model crop simulation