1. USDA-ARS; U.S. Dairy Forage Research Center; 1925 Linden Dr. Madison WI 53706-1108
2. Agric. & Agri-Food Canada; Nova Scotia Agric. College; 58 River Rd. Truro NS B2N 5E3 Canada
3. Agric. & Agri-Food Canada; 6947 Hwy. 7 Agassiz BC V0M 1A0 Canada
4. Univ. of Minnesota; NCROC; 1861 E. Hwy. 169 Grand Rapids MN 55744
5. Michigan State Univ.; Upper Peninsula Exp. Stn., E3774 University Dr. Chatham MI 49816
6. USDA-ARS; Forage and Range Research Lab.; 6300 Old Main Hill Logan UT 84322-6300
7. Dep. of Crop and Soil Science; Cornell Univ.; 503 Bradfield Hall Ithaca NY 14853
8. Agric. & Agri-Food Canada; 5403 First Ave. S Lethbridge AB T1J 4B1 Canada
9. USDA-ARS; 1224 Airport Rd. Beaver WV 25813
10. Dep. of Plant Agric.; Univ. of Guelph; 50 Stone Rd. E. Guelph ON N1G 2W1 Canada
11. Dep. of Plant Sci.; Univ. of Saskatchewan; 51 Campus Dr. Saskatoon SK S7N 5A8 Canada
12. Agric. & Agri-Food Canada; 1468 Rue St. Cyrille Normandin QC G8M 4K3 Canada
13. Dep. of Agronomy & Plant Genetics; Univ. of Minnesota; 1991 Buford Cir. St. Paul MN 55108
14. Dep. of Crop and Soil Sci.; The Pennsylvania State Univ., Agric. Sci. & Ind. Bldg.; University Park PA 16802
15. Michigan State Univ.; W.K. Kellogg Biological Station Hickory Corners MI 49060
16. Agric. & Agri-Food Canada; 2560 Boul. Hochelaga City of Quebec QC G1V 2J3 Canada
17. New Liskeard Agric. Res. Stn.; Kemptville Campus, Box 6007, 340 Armstrong St. New Liskeard ON P0J 1P0 Canada
18. Univ. of Idaho; Twin Falls Research & Extension Center; P.O. Box 1827 Twin Falls ID 83303-1827
19. Virginia Polytech. Inst. & State Univ.; 2375 Darvills Rd. Blackstone VA 23824
20. USDA-ARS; 2615 E. 29th St. Marshfield WI 54449-8401