1. Friedrich-Schiller-Universität Jena Institut für Geowissenschaften 07749 Jena Germany
2. Universität Bonn Soil Science and Soil Ecology Institute of Crop Science and Resource Conservation Nussallee 13 53115 Bonn Germany
3. University of Natural Resources and Life Sciences Vienna Institute of Soil Research Department of Forest and Soil Sciences Vienna Austria
4. Leibniz Universität Hannover Institute of Soil Science Herrenhäuser Str. 2 30419 Hannover Germany
5. Forschungszentrum Jülich GmbH Agrosphere (IBG-3) Institute of Bio and Geosciences 52425 Jülich Germany
6. Universität Bonn Molecular Biology of the Rhizosphere Institute of Crop Science and Resource Conservation Nussallee 13 53115 Bonn Germany
7. Martin-Luther-Universität Halle-Wittenberg Bodenkunde und Bodenschutz / Soil Science and Soil Protection Von-Seckendorff-Platz 3 06120 Halle (Saale) Germany
8. Universität Kassel Ökologische Agrarwissenschaften (FB11) Fachgebiet Bodenkunde Nordbahnhofstr. 1a 37213 Witzenhausen Germany
9. Friedrich-Alexander University Erlangen-Nürnberg Applied Mathematics I Mathematics Department Cauerstr. 11 91058 Erlangen Germany
10. Technical University of Munich Chair of Soil Science TUM School of Life Sciences Weihenstephan 85354 Freising Germany
11. Technical University of Munich Institute for Advanced Study Lichtenbergstr. 2a 85748 Garching Germany