Allred, E. R.Blake, G. R.Larson, C. L.2014-12-302014-12-301958-04https://hdl.handle.net/11299/16877324 pages; includes photographs, plans and drawings. 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