This position is located within the USDA Agricultural Research Service (ARS), at the Conservation and Production Research Laboratory Unit in Bushland, TX.  U.S. citizenship is required.  In this position, you will conserve air quality, maintain animal productivity, and enhance use of manure and soil nutrients of cattle production systems for the Southern Great Plains. Duties involve (1) developing strategies to enhance the efficiency of cattle production systems and reduce potential environmental risks associated with beef and dairy production and manure use, (2) examining the effects of feed additives and ingredients on enteric greenhouse gas emission by feedlot cattle, and (3) assisting in