1. Universidad Politécnica de Madrid Departamento de Producción Agraria Avda. Puerta de Hierro, n° 2 28040 Madrid Spain
2. Madrid Institute for Rural, Agricultural and Food Research and Development—IMIDRA Applied Research and Agricultural Extension Carretera A-2 km 38.2 28800 Alcalá de Henares, Madrid Spain
3. Czech University of Life Sciences Prague Department of Crop Science and Agroforestry, Faculty of Tropical AgriSciences Kamycka 129, Prague 6-Suchdol Prague Czech Republic