Johnson, Donald W.Linn, James G.Hanson, James O.Reneau, JeffreyBates, Donald W.2019-09-182019-09-181987https://hdl.handle.net/11299/2072871 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