1Received for publication February 21, 1980. Journal Series No. 21-80 of the Ohio Agricultural Research and Development Center. A portion of this paper is from a Dissertation submitted by the senior author to the Graduate School, The Ohio State University as partial fulfillment of the degree of Doctor of Philosophy.
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2Present address, Department of Horticulture, Shambat Research Station, Box 30, Kartoum, North, The Republic of Sudan.
3Professor, Department of Horticulture, Ohio Agricultural Research and Development Center, Wooster, OH 44691.
4Soil Scientist, USDA-SEA-AR, Coastal Plain Experiment Station, Tifton GA 31794. Appreciation is extended to L. A. Holl, Nestle Enterprises, Inc., Liepsic, OH 45856 and R. R. Romanowski, Purdue University, West Lafayette, IN 47907 for their cooperation in conducting the 1976 field trials.