1. Virginia Polytechnic Inst. and State Univ.; Eastern Shore Agric. Research and Ext. Center; 33446 Research Dr. Painter VA 23420
2. USDA-ARS; J. Phil Campbell Sr. Natural Resource Conserv. Center; 1420 Experiment Station Rd. Watkinsville GA 30677
3. Auburn Univ.; Agronomy and Soils Dep.; 202 Funchess Hall Auburn University AL 36849
4. USDA-ARS; National Soil Dynamics Lab.; 411 South Donahue Dr. Auburn AL 36832