1. USDA‐ARS Cropping Systems and Water Quality Research Unit 243 Agric. Eng. Bldg. Columbia MO 65211 USA
2. Iowa State Univ. 3208 Agronomy Hall Ames IA 50011 USA
3. Purdue Univ. Lilly 3‐365 West Lafayette IN 47907 USA
4. Independent Agronomist 13801 Summit Dr. Clive IA 50325 USA
5. Univ. of Nebraska Keim 367 Lincoln NE 68583 USA
6. Univ. of Minnesota 1991 Upper Buford Circle St. Paul MN 55108 USA
7. North Dakota State Univ. PO Box 6050 Fargo ND 58108 USA
8. University of Wisconsin‐Madison 1525 Observatory Dr. Madison WI 53706 USA
9. Corteva Agriscience 8325 NW 62nd Ave. Johnston IA 50131 USA
10. Univ. of Illinois W‐301 Turner Hall, 1102 S. Goodwin Urbana IL 61801 USA
11. Soil Health Institute 6807 Ridge Rd Lincoln NE 68512 USA