Hutjens, M. F.Otterby, D. E.Martin, N. P.Linn, J. G.2019-09-182019-09-181977https://hdl.handle.net/11299/2068281 online resource (PDF, 2 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