1. Agronomy Department; University of Florida; Gainesville; FL; 32611; USA
2. Agricultural & Biological Engineering Department; University of Florida; Gainesville; FL; 32611; USA
3. USDA-ARS; Arid Land Agricultural Research Center; Maricopa; AZ; 85138; USA
4. Departmento Producción Vegetal: Fitotecnia; Universidad Politécnica de Madrid; 28040; Madrid; Spain