Gilbertson, Conrad B.Fischbach, Paul E.Hermanson, Ronald E.Melvin, Stewart W.Sweeten, John M.Bergsrud, FredJacobs, L. W.Peterson, A. E.Vaigneur, Hugh O.2019-09-182019-09-181983-11https://hdl.handle.net/11299/2074341 online resource (PDF, 6 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