1. Graduate assistant, late associate professor, and assistant professor, respectively. Department of Food Science and Human Nutrition, Washington State University, Pullman, WA, 99164-6376.
2. Associate professor, Department of Crop and Soil Sciences, Washington State University, Pullman, WA, 99164-6420.
3. Corresponding author. Phone: 509/335-7247. Fax: 509/335-4815. E-mail: kidwell@mail.wsu.edu