Received for publication May 11, 1974. Scientific paper No. 4237. College of Agriculture Research Center, Washington State University. Work was conducted under project 0156. Seed was supplied by Gallatin Valley Seed Co., Twin Falls, Idaho, and Sequestrene® manganese containing the active ingredient disodium manganous ethylene-diamine tetraacetate dihydrate, by Geigy Agricultural Chemicals. Partial financial support was provided by Northwest Agricultural Research Foundation, Mount Vernon, Washington.
Assistant Horticulturist and Senior Experimental Aide, Department of Horticulture.