1. Department of Soil, Water, and Climate; University of Minnesota-Twin Cities; Borlaug Hall 1991 Upper Buford Circle St. Paul MN 55108
2. USDA-Agricultural Research Service; North Central Soil Conservation Research Lab.; 803 Iowa Ave. Morris MN 56267
3. University of Minnesota; West Central Research and Outreach Center; 46352 State Highway 329 Morris MN 56267