[1] Aarhus Univ, Fac Agr Sci, Dept Agr Engn, Res Ctr Foulum, DK-8830 Tjele, Denmark
[2] Inst Technol & Management Agr Ecosyst, Ctr Res & Technol, GR-38500 Volos, Greece
[3] Univ Basilicata, I-85100 Potenza, Italy
[4] MTT Agrifood Res Finland, Vihti 03400, Finland
[5] Univ Copenhagen, Inst Food & Resource Econ, DK-1958 Frederiksberg C, Denmark
[6] Univ Rostock, Fac Agr & Environm Sci, Inst Management Rural Areas, D-18059 Rostock, Germany
[7] King Saud Univ, Riyadh 11451, Saudi Arabia