1C. E. Stewart, 1G. L. Miner, 1V. L. Jin, 1M. R. Schmer, 1C. Williams, 1R. B. Mitchell
1. Soil Management and Sugarbeet Research Unit, USDA-ARS Fort Collins, CO
2. Agroecosystems Management Research Unit, USDA-ARS, Lincoln, NE
3. Charles E. Kellogg National Soil Survey Research & Laboratory, USDA-NRCS, Lincoln, NE
4. Wheat, Sorghum and Forage Research Unit, USDA-ARS, Lincoln, NE