Acknowledgements
This project has received funding from the European Union’s Horizon 2020
research and innovation program under grant agreement No. 727284. We
would like to thank Alexandra Esther, Mechthild Budde, Sabine Hansen and
the other staff from the Julius-Kühn-Institute for on-site facilities
and field assistance and Norbert and Alexander Kreuzheck for field site
management including machinery. We also thank our student helpers for
support during the field season.