State University. Extension Service, O., State University. Cooperative Extension, W., of Idaho. Cooperative Extension Service, U., States. Department of Agriculture, U., Northwest Cooperative Extension, P., Hannaway, D., & Ballerstedt, 1. (1988). Testing the quality of alfalfa hay. : [Corvallis, Or.] : Oregon State University Extension Service ; [Pullman, Wash.] : Washington State University Cooperative Extension ; [Moscow, Idaho] : University of Idaho Cooperative Extension Service ; [Washington, D.C.] : U.S. Dept. of Agriculture.