1. Mississippi Water Resources Research Institute Mississippi State Univ. 855 Stone Blvd. Mississippi State MS 39762 USA
2. USDA‐ARS, National Sedimentation Laboratory 598 McElroy Dr. Oxford MS 38655 USA
3. Delta Research and Extension Center Mississippi State Univ. 82 Stoneville Rd. Stoneville MS 38776 USA
4. Dep. of Crop and Soil Sciences Univ. of Georgia 2360 Rainwater Rd. Tifton GA 31793 USA
5. The Graduate School Mississippi State Univ. 175 President Circle Mississippi State MS 39762 USA
6. J.R. Simplot Company P.O. Box 70013 Boise ID 83707 USA