1. Department of Environmental Systems Science (D-USYS), Institute of Agricultural Sciences Swiss Federal Institute of Technology (ETH), Zürich, Switzerland;
2. Hermiston Agricultural Research & Extension Center Oregon State University, Hermiston, OR, USA;
3. Agroscope Reckenholz - Tänikon Research Station ART, Zurich, Switzerland;
4. Department of Soil Water Resources, Institute of Industrial and Forage Crops, Hellenic Agricultural Organization – “Demeter”, Larissa, Greece