1. USDA-ARS, Southeast Watershed Research Lab.; Tifton GA 31793
2. USDA-ARS, Sustainable Agricultural Systems Lab.; Animal and Natural Resources Institute; Beltsville MD 20705
3. USDA-ARS, J.P. Campbell Sr., Natural Resource Conservation Center; Watkinsville GA 30677
4. Crop and Soil Sciences Dep.; Univ. of Georgia; Athens GA 30602
5. USDA-ARS, National Sedimentation Lab., Water Quality & Ecological Research Unit; Oxford MS 38655