Hansen, Hugh J.; Trimmer, Walter L.; Oregon State University. Extension Service; Washington State University. Cooperative Extension; University of Idaho. Cooperative Extension Service; United States. Dept. of Agriculture; Pacific Northwest Cooperative Extension ([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, 1986-01)
More than 4.5 million acres in the Pacific
Northwest are irrigated with electric-powered
sprinkler systems. Center pivots are used on about
1.25 million acres. Irrigation runoff can be a problem
on many of these spri ...