D. H. Putnam1, E. S. Oplinger2, J. D. Doll2, and E. M. Schulte2 1Center for Alternative Plant & Animal Products, Minnesota Extension Service, University of Minnesota, St. Paul, MN 55108. 2Departments of Agronomy and Soil Science, College of Agricultural and Life Sciences and Cooperative Extension Service, University of Wisconsin – Madison, WI 53706. November, 1989. […]