1. Division of Soil Science and Site Science; Faculty of Life Science Institute of Agriculture and Horticulture, Humboldt-Universität zu Berlin; Albrecht-Thaer Weg 2 14195 Berlin Germany
2. Applied Geophysics; Institute of Earth and Environmental Science, University of Potsdam; Karl-Liebknecht-Str. 24-25 14476 Potsdam Germany
3. State Office for Mining, Geology and Natural Resources Brandenburg; Inselstraße 26 03046 Cottbus Germany