1. Cancer Prevention Lab., Dep. of Horticulture and Landscape Architecture; Colorado State Univ.; Fort Collins CO 80523-1173
2. Dep. of Crop and Soil Sciences; Washington State Univ.; 201 Johnson Hall Pullman WA 99164-6420
3. Panhandle Research and Extension Center; Univ. of Nebraska-Lincoln; 4502 Avenue I Scottsbluff NE 69361
4. College of Agricultural, Human, and Natural Resource Sciences; Washington State Univ.; 423 Hulbert Hall Pullman WA 99164-6243