1. University of Helsinki
2. University of Aveiro
3. Harper Adams University
4. Université de Lorraine/INRA
5. Leibniz Institute for Agricultural Engineering and Bioeconomy
6. Institute of Soil, Water and Environmental Sciences, The Volcani Center
7. Free University of Bolzano/Bozen
8. Cranfield University
9. Department of Soil Quality and Climate Change, Norwegian Institute of Bioeconomy Research
10. Universidade de Lisboa
11. Autonomous University of Barcelona
12. European Food Safety Agency
13. Technical University of Madrid
14. Slovak University of Agriculture in Nitra
15. Hochschule Geisenheim University
16. Iowa State University
17. Compost/AD Research & Advisory (IE,CY)
18. Brazilian Agricultural Research Corporation – EMBRAPA Environment
19. Institute for Agricultural and Fisheries Research (ILVO)
20. Research Institute of Horticulture, Rhizosphere Laboratory
21. Brazilian Agricultural Research Corporation-EMBRAPA Soils
22. University of Udine
23. California State University Stanislaus
24. Martin Luther University Halle-Wittenberg