Abstract
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Contributor Notes
Received for publication November 19, 1977. This research was supported by the College of Agricultural and Life Sciences, University of Wisconsin, Madison, WI 53706, and by grants from the Fred C. Gloeckner Foundation, New York, NY 10010, and Eli Lily and Company, Indianapolis, IN 46206.
The cost of publishing this paper was defrayed in part by the payment of page charges. Under postal regulations, this paper must therefore be hereby marked advertisement solely to indicate this fact.
Present address: Department of Horticultural Science and Landscape Architecture, University of Minnesota, St. Paul, MN 55108.
Abstract
