1. Department of Biological and Agricultural Engineering, Kansas State University, Manhattan, KS 66506.
2. Present address: C. W. Brabender Instrument, Inc., 50 E. Wesley Street, S. Hackensack, NJ 07606.
3. U.S. Department of Agriculture, Agricultural Research Service (USDA-ARS), Center for Grain and Animal Health, Manhattan, KS 66502.
4. USDA-ARS, Grain, Forage, and Bioenergy Research Unit, Lincoln, NE 68583. Names are necessary to report factually on available data; however, USDA neither guarantees nor warrants the standard of the product, and the use of the name by the USDA implies no approval of the product to the exclusion of others that may also be suitable.
5. Department of Agronomy, Kansas State University, Manhattan, KS 66506.
6. Corresponding author. Phone: (785) 532-2919. Fax: (785) 532-5825. E-mail: dwang@ksu.edu