Fig. 6

Comparison of the aggregated district data (blue line, own calculation) with the official national aggregated German crop data (red line, validation). (a) Yield. (b) Area. (c) Production (i.e. yield × area). For this comparison, only the years of the national agricultural-structure survey (1979, 1983, 1987, 1991, 1995, 1999, 2003, 2007, 2010, 2016, and 2020) were considered.