APA

Trimmer, W., Hansen, H., State University. Extension Service, O., State University. Cooperative Extension, W., of Idaho. Cooperative Extension Service, U., & States. Dept. of Agriculture, U. (1986). Irrigation scheduling. : [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.