Fig. 11

Spatial details of the plastic-mulched farmland (PMF) map subsets from different regions in the years of 2019, 2020, and 2021. Site A, B, C, and D correspond to the four typical regions marked in Fig. 10. The 1st, 3rd, and 5th columns are the Sentinel-2 (S2) images with a true-color composite of red, green, blue bands in the years of 2019, 2020, and 2021, respectively. The 2nd, 4th, and 6th columns are the PMF maps established in this study.