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- A contribution from the University of Georgia Agricultural Experiment Station, Georgia Station, Experiment, Georgia 30212 and College Station, Athens, Georgia 30602.
- Former Assistant Professor of Agronomy, Georgia Station, Experiment, Georgia. Presently Associate Professor of Agronomy, University of Florida, Gainesville, Florida.
- Professors of Agronomy and Plant Science, respectively, University of Georgia, Georgia Station, Experiment, Georgia 30212 and College Station, Athens, Georgia 30602, respectively.