1Received for publication April 6, 1981.
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.
2Present addresses, Department of Agronomy, Cornell University, Ithaca, NY 14853 and Campbell Institute for Research and Technology, Rt. I, Box 1314, Davis, CA 95616.
1018 Duke Street
Alexandria, VA 22314
© 2018-2023 American Society for Horticultural Science
Character limit 500/500