1. USDA-ARS, Southeast Watershed Research Laboratory, Tifton, Georgia 31793, USA; E-mail: (P. G. T.), Erin.Grabarczyk@usda.gov (E. E. G.)
2. Auburn University, College of Agriculture, Auburn, Alabama 36849, USA; E-mail: (K. A. K.), klh0083@auburn.edu (K. L. H.)