1. USDA Forest Service; Rocky Mountain Research Station; 1221 S. Main St Moscow ID 83843 USA
2. Horticultural Crops Research Laboratory; USDA-ARS; Corvallis OR USA
3. Department of Forestry, Environment, and Systems; Kookmin University; Seoul Korea
4. Pacific Northwest Research Station; USDA Forest Service; Corvallis OR USA
5. Wildland Resources Department; Utah State University; Logan UT USA
6. Rocky Mountain Research Station; USDA Forest Service; Provo UT USA