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Contributor Notes
Received for publication June 7, 1980. Contribution from the Department of Horticulture and Illinois Agricultural Experiment Station Project No. 65364. Plant material for this research was kindly supplied by Charles Klehm and Son Nursery, Arlington Heights, Illinois.
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.
Associate Professor in Nursery Management.
Abstract
