Evans, LawrenceBritt, JackKirkbride, ClydeLevis, DonBeck, LarryHurtgen, John P.Singleton, Wayne L.Swartley, Gerald R.2019-09-182019-09-181983https://hdl.handle.net/11299/2074451 online resource (PDF, 5 pages)This archival publication may not reflect current scientific knowledge or recommendations. Current information available from the University of Minnesota Extension: https://www.extension.umn.edu.enReport