1. Swiss Federal Research Institute WSL; Zürcherstrasse 111 8903 Birmensdorf Switzerland
2. Department of Geography; University of Zurich; Winterthurerstrasse 190 8057 Zurich Switzerland
3. Scherrer AG; Schönmattstrasse 8 4153 Reinach Switzerland
4. SoilCom GmbH; Probusweg 22 8057 Zurich Switzerland