1. USDA-ARS, Soil and Water Management Unit; St. Paul MN
2. Univ. of Minnesota; Dep. of Soil, Water and Climate; St. Paul MN 55108
3. USDA-ARS, Coastal Plains Soil, Water, and Plant Research Center; Florence SC
4. USDA-ARS, Northern Great Plains Research Lab.; Mandan ND
5. USDA-ARS, Northwest Irrigation and Soils Research Lab.; Kimberly ID
6. USDA-ARS, The Vegetable and Forage Crop Research Unit; Prosser WA
7. USDA-ARS, Eastern Regional Research Center; Wyndmoor PA
8. USDA-ARS, Southern Regional Research Center; New Orleans LA
9. USDA-ARS, National Peanut Research Lab; Dawson GA