N. Ray Benson, Crop Monitoring Services, Inc., 3690 N. County Road 275, Manila, AR 72442, William C. Robertson, University of Arkansas Cooperative Extension Service, 2301 S University Ave, Little Rock, AR 72204, Tina Gray Teague, Arkansas State University - University of Arkansas Agricultural Experiment Station, PO Box 2340, State University, AR 72467, and Diana M. Danforth, University of Arkansas, Department of Agricultural Economics and Agribusiness, Agriculture Building 217, Fayetteville, AR 72701.