1. USDA Agricultural Research Service, Forage and Range Research Lab. and Dep. of Plants, Soils, and Climate; Utah State Univ.; Logan UT 84322
2. Utah State Univ.; Dep. of Animal, Dairy, and Veterinary Science; Logan UT 84322
3. Brigham Young Univ.-Idaho; Dep. of Applied Plant Science; Rexburg ID 83460