1. Department of Soil Science University of Kassel Witzenhausen Germany
2. Soil Science, Department of Ecology and Ecosystem Management, TUM School of Life Sciences Weihenstephan Technical University of Munich Freising‐Weihenstephan Germany
3. Molecular Biology of the Rhizosphere, Institute of Crop Science and Resource Conservation University of Bonn Bonn Germany
4. Soil Ecology, Institute of Forest Sciences, Faculty of Environment and Natural Resources University of Freiburg Freiburg Germany
5. Institute for Advanced Study Technical University of Munich Garching Germany