1Received for publication November 19, 1973. Scientific Paper No. 4155. College of Agriculture Research Center, Washington State University, Pullman; Project 0077.
2Horticulturist, Sr. Exp. Aide, and Exp. Aide, SW Wash. Res. Unit, Vancouver.
3Horticulturist, W. Wash. Res. and Ext. Center, Puyallup.
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