Fig. 4

Spatiotemporal change of the crop harvest area in China. The distinct colors represent different years. The ellipses denote the standard deviation ellipses of crop harvest area distribution, while the dots indicate the centers of these ellipses. Profile graphs illustrating harvest area along both longitudinal and latitudinal directions are provided at the top and right side of the map. The background map is derived from the free open-source map dataset provided by Natural Earth (https://www.naturalearthdata.com).