1. Institute of Biology, Plant Ecology; Freie Universität Berlin; Berlin Germany
2. Julius Kühn-Institut; Institute of Crop and Soil Science; Braunschweig Germany
3. Karlsruhe Institute of Technology (KIT); Institute for Catalysis Research and Technology; Eggenstein-Leopoldshafen Germany
4. Institute of Agricultural Engineering; Conversion Technology and Life Cycle Assessment of Renewable Resources; University Hohenheim; Stuttgart Germany