1. Advanced Analytical Center for Environmental Sciences, Savannah River Ecology Laboratory; Univ. of Georgia; P.O. Drawer E Aiken SC 20903
2. Dep. of Crop and Soil Sciences; Univ. of Georgia; Athens GA 30602
3. Dep. of Crop and Soil Environmental Science; Clemson Univ.; Clemson SC 29634
4. Dep. of Agronomy and Soils; Auburn Univ.; Auburn AL 36849