2021-04-302021-04-301968-04-01https://dr.lib.iastate.edu/handle/20.500.12876/104778<p>These publications are available at many local Iowa State University extension offices and can be requested from: Publication Distribution Room, Morrill Hall, Iowa State University, Ames, Iowa 50010.</p>articleisulib-bepress-aws-west293521861586farmscience/vol22/iss10/8Agriculture