Cooperative Extension Service, South Dakota State University
Alfalfa seed has high market value: producing certified adapted seed can become a more important enterprise for some South Dakota farmers. Around 100,000 acres are harvested for seed each year, but tho yield per acre is relatively low. Most producers harvest seed on a hit-and-miss basis. Only a few treat alfalfa seed as a major crop. Much of the alfalfa seed planted in South Dakota is raised in southern Idaho, eastern Oregon, southeastern Washington, and the San Joaquin Valley of California. But the acreage of certified seed of varieties recommended for South Dakota is gradually shrinking in western states. These seed growers are switching to non-dormant varieties adapted to the Southwest and to proprietary varieties because they produce more pounds of seed per acre and/or bring a higher price per pound.
Derscheid, Lyle A. and Walstrom, Robert J., "Alfalfa Seed Production" (1981). SDSU Extension Circulars. 433.