1. Graduate research assistants and professor, respectively, Department of Grain Science and Industry, Kansas State University, Manhattan, KS 66506.
2. Present address: Domino's Pizza, Inc., P. O. Box 997, Ann Arbor, MI 48106.
3. Present address: R&R Research Services, Inc., 8831 Quail Lane, Manhattan, KS 66502.
4. Corresponding author. E-mail: r_and_r@kansas.net