1Received for publication February 9, 1982.
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.
2Retired Superintendent, Prairie Farm Rehabilitation Administration, Canada Department of Regional Economic Expansion.
1018 Duke Street
Alexandria, VA 22314
© 2018-2023 American Society for Horticultural Science
Character limit 500/500