1Received for publication February 7, 1976.
2Present address: Agricultural Research and Education Center, IF AS, University of Florida, Bradenton, FL 33505.
3Department of Vegetable Crops.
4Department of Agronomy and Range Science/Plant Growth Laboratory.
5The authors thank David Paige for his technical assistance. This research was supported, in part, by an Aid to Education Grant from Campbell Soup Company.
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