中国农业化肥施用技术效率演变特征及影响因素
Characteristics of change and influencing factors of the technical efficiency of chemical fertilizer use for agricultural production in China
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 |
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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3 中国农业化肥施用技术效率的Kernel密度估计 |
| Figure 3 Kernel density estimation of China’s agricultural chemical fertilizer use technical efficiency |
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