Fig. 1.

Relationships between farm size and chemical use per area and output per area in China. (A) Farm size (measured by sowing area) and fertilizer use per area; (B) farm size and pesticide use per area; (C) farm size and crop output per area; (D) farm size and labor productivity (crop output per labor). Data source is CRHPS 2015; see SI Appendix, Materials and Methods, for more details on this dataset. All data in Fig. 1 have been log-transformed. Each data point represents an average value of a variable within a certain farm size group (29 farm size groups in total). The bubble size of each data point represents the number of farms in each farm size group, which can be found in SI Appendix, Table S1.