Affiliation: | 1. Graduate Student, Oregon State University, Corvallis, OR 97330, USA;2. Research Leader, U.S. Department of Agriculture, Agricultural Research Service, Burns, OR 97720, USA;3. Emeritus Rangeland Scientist, U.S. Department of Agriculture, Agricultural Research Service, Burns, OR 97720, USA;4. Rangeland Scientist, U.S. Department of Agriculture, Agricultural Research Service, Burns, OR 97720, USA |