Waldo, Arley D.Yoho, Carole B.2019-05-172019-05-171973https://hdl.handle.net/11299/202958This archival publication may not reflect current scientific knowledge or recommendations. Current information available from the University of Minnesota Extension: https://www.extension.umn.edu. Title I of Public Law 92-512 Approved October 20, 1972enReport