中国农业化肥施用技术效率演变特征及影响因素
王萍萍, 韩一军, 张益

Characteristics of change and influencing factors of the technical efficiency of chemical fertilizer use for agricultural production in China
WANG Pingping, HAN Yijun, ZHANG Yi
图1 1991—2017年中国农业化肥施用技术效率及其年均增长率
Figure 1 China’s agricultural chemical fertilizer use technical efficiency and its average annual growth rate, 1991-2017