1. Hungarian Academy of Sciences ISSAC-CAR, Herman Ottó út 15; Budapest H-1022 Hungary
2. Department of Crop Production and Soil Science, Georgikon Faculty; University of Pannonia, Deák F. u. 16; Keszthely H-8360 Hungary
3. European Commission, Joint Research Centre (JRC), Via Enrico Fermi 2749, 21027; Ispra Italy