1. Remote Sensing Department, University of Trier, Campus II, 54286 Trier, Germany
2. Unit of Soil Biology, Federal Research and Training Centre for Forests, Natural Hazards and Landscape (BFW), Seckendorff‐Gudent‐Weg 8, 1131 Wien, Austria
3. Department of Environmental Chemistry, University of Kassel, Nordbahnhofstraße 1a, 37213 Witzenhausen, Germany