1. USDA‐ARS Northern Plains Agricultural Research Lab. 1500 N. Central Ave. Sidney MT 59270
2. Agrium Inc. Suite 1700, 4582 S. Ulster St. Denver CO 80237
3. Univ. of Wyoming Sust. Agric. Res. and Ext. Center 2753 State Hwy. 157 Lingle WY 82223
4. Dep. of Plant and Animal Sciences Brigham Young Univ. Provo UT 84602
5. Wilbur‐Ellis Company 150 Burlington St. Pasco WA 99301