Figure 3

The working efficiency (a and b) and fuel consumption (c and d) of the different seeders in 2017 (a and c) and 2018 (b and d). SM1-1 small-size broadcast seeder, SM1-2 small-size drill seeder, SM2 small-size strip seeder, SM3 medium-size strip seeder, SM4 medium-size drill seeder.