1. Food Animal Environmental Systems Research Unit, USDA-ARS; Bowling Green KY 42101
2. Cropping Systems and Water Quality Research Unit, USDA-ARS; Columbia MO 65211
3. Agronomy; Kansas State Univ.; Manhattan KS 66506
4. Crop and Soil Sciences; North Carolina State Univ.; Raleigh NC 27695
5. Crop and Soil Sciences; Univ. of Georgia-Athens; Athens GA 30602
6. Civil and Environmental Engineering; Mississippi State Univ.; Mississippi State MS 39762
7. Crop, Soil and Environmental Sciences; Univ. of Arkansas; Fayetteville AR 72701
8. Pasture Systems and Watershed Management Research Unit, USDA-ARS; University Park PA 16802
9. Texas Institute for Applied Environmental Research, Tarleton State Univ.; Stephenville TX 76401
10. Independent Consultant; Columbia MO 65211
11. College of Food, Agricultural, and Environmental Sciences, The Ohio State Univ.; Wooster OH 4321
12. Center for Agroforestry; School of Natural Resources, Univ. of Missouri; Columbia MO 65211