Stuart P. Hardegree1, Bruce A. Roundy2, Thomas A. Jones3, Fredrick B. Pierson1, and Patrick E. Clark1. (1) Northwest Watershed Research Center, USDA Agricultural Research Service, 800 Park Blvd., Suite 105, Boise, ID 83712-7716, (2) Plant and Animal Science, Brigham Young University, Provo, UT 84602, (3) USDA-ARS Forage & Range Research Laboratory and Dept. of Wildland Resources, Utah State University, Logan, UT 84322-6300