Hicks, D. R.Rehm, G. W.Behrens, R.Stienstra, W. C.Ostlie, K. R.Cloud, H. A.Fuller, E. I.2019-09-182019-09-181986https://hdl.handle.net/11299/2074641 online resource (PDF, 4 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