1Received for publication August 8, 1978.
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.
2Present address: Agronomist, Asian Development Bank, P.O. Box 789, Manila Philippines.
1018 Duke Street
Alexandria, VA 22314
© 2018-2023 American Society for Horticultural Science
Character limit 500/500