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Contributor Notes
Received for publication May 22, 1981. Scientific Paper No. 5915. College of Agriculture Research Center, Washington State University, Pullman, WA 99164; Project No. 0038. We thank R. A. Norton, North-western Washington Research and Extension Unit, Mt. Vernon for assistance in establishment and maintenance of the planting.
The cost of publishing this paper was defrayed in part by the payment of page charges. Under postal regulations, this paper therefore must be hereby marked advertisement solely to indicate this fact.
Abstract
