1. Department for Soil Health and Plant Nutrition; Institute for Sustainable Plant Production; Austrian Agency for Health and Food Safety (AGES); Spargelfeldstraße 191 AT-1220 Vienna Austria
2. Department for Statistics and Analytical Epidemiology; Austrian Agency for Health and Food Safety (AGES); Zinzendorfgasse 27/1 AT-8010 Graz Austria
3. Department of Agricultural, Forest and Food Sciences; Università degli Studi di Torino; largo P. Braccini 2 10095 Grugliasco Italy
4. Department of Agricultural and Environmental Sciences - Production, Landscape, Agroenergy; Università degli Studi di Milano; Via Celoria 2 20133 Milano Italy
5. Plant Sciences Unit; Flanders Research Institute for Agriculture, Fisheries and Food (ILVO); Burg. Van Gansberghelaan 109 9820 Merelbeke Belgium
6. Wageningen Plant Research; P.O. Box 16 6700 AA Wageningen The Netherlands
7. Department of Plant Nutrition and Fertilization; Institute of Soil Science and Plant Cultivation - State Research Institute (IUNG-PIB); Czartoryskich 8 24-100 Pulawy Poland
8. Department of Bioeconomy and Systems Analysis; Institute of Soil Science and Plant Cultivation - State Research Institute (IUNG-PIB); Czartoryskich 8 24-100 Pulawy Poland
9. Department of Agronomy; University of Córdoba; Ed. Leonardo Da Vinci, Carretera Nacional IV, km 396 14014 Córdoba Spain
10. Centro Las Torres-Tomejil; IFAPA; Ctra. Sevilla-Cazalla, km 12.2 41200 Seville Spain
11. Thünen Institute of Agricultural Technology; Bundesallee 47 38116 Braunschweig Germany