Fig. 1

An official digital orthophoto (DOP20) outlining the field trial Westerfeld (© GeoBasis-DE / LVermGeo ST, licensed under “Data license Germany - attribution - Version 2.0” (www.govdata.de/dl-de/by-2-0)). Information on crop rotation of winter rapeseed (WR), winter barley (WB), winter wheat 1 (WW1), grain maize (GM), and winter wheat 2 (WW2) were added manually. The black arrows indicate the direction of crop rotation, while the red parcels represent the field plan.