1. Assistant Professor, Horticultural Sciences Dept., Univ. of Florida, 1241 Fitfield Hall, P.O. Box 110690, Gainesville, FL 32611-0690 (corresponding author).
2. Associate Professor, Dept. of Agricultural and Biological Engineering, Univ. of Florida, Frazier Rogers Hall, P.O. Box 110570, Gainesville, FL 32611.
3. Assistant Professor, Biological Farming Systems/Plant Production Systems, Wageningen Univ., Marijkeweg 22, 6709 PG, Wageningen, The Netherlands.
4. Graduate Student, Dept. of Agricultural and Biological Engineering, Univ. of Florida, Frazier Rogers Hall, P.O. Box 110570, Gainesville, FL 32611.
5. Associate Professor, Dept. Agricultural and Biological Engineering, Univ. of Florida, Frazier Rogers Hall, P.O. Box 110570, Gainesville, FL 32611.