Matthew Stermer1, Mark Easter1, Amy Swan1, Keith Paustian2, Kevin D Brown1, Crystal Tourenne1, Justin Ziegler1, Ernie Marx1, Adriane Huber1, Sobha Velayudan1, Adam Chambers3 and Marci Barabski4, (1)Natural Resource Ecology Laboratory, Colorado State University, Fort Collins, CO (2)200 West Lake Street/Central Rec., Colorado State University, Fort Collins, CO (3)USDA/NRCS, Portland, OR (4)Office of the Chief Economist, USDA, Washington, DC
COMET-FarmTM is an integrated web-based decision support tool developed in collaboration with and support from the NRCS and USDA to aid farmers, agricultural producers, natural resource professionals, land managers and conservationists in making land and livestock management decisions regarding greenhouse gas emissions and carbon sequestration. COMET-FarmTM provides total farm, ranch and woodlot greenhouse gas accounting, including cropland, pasture, range, agroforestry, forestry, livestock and on-farm/ranch energy use modules. Biomass and soil carbon; CO2 emissions from liming, urea fertilization and drained organic soils; CO from biomass burning; N2O from soil, wetland rice cultivation, biomass burning and drained organic soils; and CH4 from soil, wetland rice cultivation and biomass burning are accounted for in the tool using the methods described in the USDA document, Quantifying Greenhouse Gas Fluxes in Agriculture and Forestry: Methods for Entity-Scale Inventory. Calculations are done to estimate past, present and future emissions for user designed and selected management scenarios. Agricultural soil management is the leading source of greenhouse gas emissions in the agricultural sector. Applying conservation practices can greatly reduce the amount of greenhouse gas released into the environment and aid in building and storing soil carbon. COMET-FarmTM allows rapid assessment of conservation scenarios to aid in conservation planning. To showcase the tools capabilities, conservation scenarios are contrasted in real-world rice production systems in eastern Arkansas, demonstrating how on-farm practices influence the greenhouse gas flux from rice production systems.