1. University of Freiburg, Faculty of Environment and Natural Resources, Chair of Soil Ecology, Bertoldstr. 17, 79098 Freiburg i.Br., Germany
2. University of Freiburg, Faculty of Environment and Natural Resources, Chair of Silviculture, Tennenbacher Straße 4, 79106 Freiburg i.Br., Germany
3. ETH Zurich, Group of Plant Nutrition, Eschikon 33, 8315 Lindau, Switzerland
4. Leibniz Institute of Vegetable and Ornamental Crops, Theodor‐Echtermeyer‐Weg 1, 14979 Großbeeren, Germany
5. University Halle‐Wittenberg, Soil Science, Von‐Seckendorff‐Platz 3, 06120 Halle (Saale), Germany
6. Technische Universität Berlin, Department of Soil Science, Ernst‐Reuter‐Platz 1, 10587 Berlin, Germany
7. University of Bayreuth, Soil Ecology, Dr.‐Hans‐Frisch‐Straße 1‐3, 95448 Bayreuth, Germany
8. University of Göttingen, Department of Forest Botany and Tree Physiology, Büsgenweg 2, 37077 Göttingen, Germany
9. Technische Universität München, Chair of Soil Science, Emil‐Ramann‐Straße 2, 85354 Freising, Germany
10. University of Freiburg, Faculty of Environment and Natural Resources, Chair of Tree Physiology, Georges‐Köhler‐Allee Geb. 053/054, 79110 Freiburg i.Br., Germany
11. Thünen Institute, Institute of Forest Ecosystems, Alfred‐Möller‐Straße 1, 16225 Eberswalde, Germany