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Contributor Notes
Received for publication October 25, 1979. Paper No. 6512 of the Journal Series of the North Carolina Agricultural Research Service, Raleigh, NC. The use of trade names does not imply endorsement by the North Carolina Agricultural Research Service of the products named nor criticism of similar ones not mentioned.
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.
Graduate Assistant, Department of Horticultural Science (Present address: North Carolina Agricultural Extension Service, Greensboro, NC 27420).
Assistant Professor, Department of Horticultural Science.
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