Analysis of climatic and geographic data identified eight distinct alfalfa-growing regions

The following researchers played a significant role in this project: Vern L, Marble, Agronomist, Cooperative Extension, UC Davis; William F. Lehman, Agronomist, Department of Agronomy and Range Science, stationed at the UC Imperial Valley Field Station, El Centro; Ike I. Kowaguchi, former Senior Research Agronomist, W-L Research, Bakersfield; Marvin K. Miller (deceased), Western Alfalfa Breeder, Pioneer Hibred International, Fresno; Boyd J. Hartman, former Research Agronomist, and Oliver J. Hunt (retired), Research Agronomist, USDA-ARS, University of Nevada, Reno; Donald K. Barnes, Research Geneticist, USDA-ARS, University of Minnesota, St. Paul; Bill Burrows, Professor, Shasta Junior College, Redding, California; Donald L. Lancaster, Farm Advisor, UC Cooperative Extension, Modoc County; and Russell H. Gripp, retired Farm Advisor, Shasta County.