Affiliation: | 1.Pasture Systems and Watershed Management Research Unit, US Department of Agriculture—Agricultural Research Service, University Park, PA, 16802, USA ;2.BASF Corporation, 100 Park Avenue, Florham Park, NJ, 07932, USA ;3.Formerly of National Cattlemen’s Beef Association, 9110 East Nichols Ave., Suite 300, Centennial, CO, 80112, USA ; |