1. Professor, Area of Agro-Forestry Engineering, Univ. of Seville, EUITA, Ctra. Utrera km.1, 41013 Sevilla, Spain (corresponding author).
2. Research Fellow, Dept. of Agronomy, Univ. of Córdoba, Campus Rabanales, Edif. Da Vinci, 14071 Córdoba, Spain.
3. Professor, Dept. of Agronomy, Univ. of Córdoba, Campus Rabanales, Edif. Da Vinci, 14071 Córdoba, Spain.
4. Professor, Dept. of Applied Physics, Univ. of Córdoba, Campus Rabanales, Edif. Einstein, 14071 Córdoba, Spain.