1. USDA, Agricultural Research Service; Northwest Watershed Research Center; Boise; ID; USA
2. USDA, Agricultural Research Service; Southwest Watershed Research Center; Tucson; AZ; USA
3. USDA, Agricultural Research Service; US Sheep Experiment Station; Dubois; ID; USA
4. Department of Geosciences; Boise State University; Boise; ID; USA
5. Department of Biological and Agricultural Engineering; University of Idaho; Moscow; ID; USA
6. USDA, Agricultural Research Service; Exotic and Invasive Weeds Research Unit; Reno; NV; USA