COMET-Farm is a whole farm and ranch carbon and greenhouse gas accounting system. The tool guides you through describing your farm and ranch management practices including alternative future management scenarios.
https://www.nrcs.usda.gov/wps/portal/nrcs/detail/national/programs/... ---- COMET-Farm, and earlier versions of COMET, was developed through a partnership between NRCS and Colorado State University. There is more than a decade of model development experience reflected in COMET. COMET is the official greenhouse gas quantification tool of USDA.