1. Dep. of Agriculture; 204 B Albertson Hall, Fort Hays State Univ.; Hays KS 67601
2. Dep. of Agronomy; Kansas State Univ.; Manhattan KS 66506
3. Southeast Agricultural Research Center; Kansas State Univ.; Parsons KS 67357
4. USDA-ARS Cropping Systems and Water Quality Research Unit, 241 Agricultural Engineering Building; Univ. of Missouri; Columbia MO 65211
5. Division of Plant Sciences, 108 Waters Hall; Univ. of Missouri; Missouri MO 65211
6. Dep. of Biological & Agricultural Engineering; Kansas State Univ.; Manhattan KS 66502