1. Identity Preserved Grain laboratory director, Illinois Crop Improvement Association, 3105 Research Road, Champaign, IL 61822. Adjunct assistant professor, Agricultural Engineering Department, University of Illinois, Urbana, IL.
2. Professor, Agricultural Engineering Department, University of Illinois, 1304 West Pennsylvania Ave, Urbana, IL 61801.
3. Corresponding author. E-mail: seckhoff@uiuc.edu.