Received for publication 12 Aug. 1985. Published as Alabama Agricultural Experiment Station Journal Series paper 3-85858. 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.
Assistant Professor, Agronomy and Soils.
Associate Professor, Horticulture.
Former area extension specialist.
Superintendent, Tennessee Valley Substation.
Associate Professor, Horticulture, Clemson, Univ., Clemson, SC 29361.