Snyder, Leon C.Wood, Raymond J.Christensen, Clyde M.Hodson, A. C.2014-12-302014-12-301948-06https://hdl.handle.net/11299/16867828 pages; includes photographs. 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.en-USNewsletter or Bulletin