1. Dep. of AgronomyUniv of Wisconsin‐Madison Madison WI 53706‐1597
2. Dep. of Agronomy and Plant GeneticsUniv. of Minnesota St. Paul MN 55108
3. Dep. of Crop, Soil, and Envt. Sci.Virginia Poly. Inst. Blacksburg VA 24061
4. Dep. of AgronomyThe Pennsylvania State Univ. University Park PA 16802
5. Dep. of AgronomyIowa State Univ. Ames IA 50010
6. Dep. of Plant Breeding and BiometryCornell Univ. Ithaca NY 14853‐1902
7. Agric. Res. Stn.Univ. of Wisconsin‐Madison Ashland WI 54806
8. Dep. of Horticulture and Crop Sci.Ohio State Univ. Columbus OH 43210
9. Dep. of AgronomyUniv. of Kentucky Lexington KY 40506
10. ITB Tech. Inc. Spring Green WI 53588
11. AgResearch Intl. Inc. Madison WI 53719
12. Pure Seed Testing Inc. Hubbard OR 97032