Heather R. Robinson¹, C.H. Koger², J.W. Wilcut³, P.A. Dotray⁴, J. B. Wilkerson⁵, Philip Allen⁶, D.H. Poston⁷, V.K. Nandula⁷, J.B. Blessitt⁷, and Thomas W. Eubank⁷. (1) Delta Research and Extension Center, P.O. Box 197, Stoneville, MS 38776, (2) USDA, 141 Experiment Station Road JWDSRC, Stoneville, MS 38776, (3) North Carolina State University, 4402 Williams Hall, North Carolina State University, Raleigh, NC 27695, (4) Texas Agriculture Experiment Station, Rt. 3 Box 219, Lubbock, TX 79403, (5) University of Tennessee Agricultural Experiment Station, 2621 Morgan Cir., 103 Morgan Hall, Knoxville, TN 37901, (6) University of Tennessee, 2506 E.J. Chapman Dr., Biosystems Engineering & Soil Science, Knoxville, TN 37996, (7) Mississippi State University, 82 Stoneville Rd, P.O. Box 197, Stoneville, MS 38776