中国山区耕地利用边际化表现及其机理 |
李升发,李秀彬 |
Economic characteristics and the mechanism of farmland marginalization in mountainous areas of China |
LI Shengfa,LI Xiubin |
图4 1995-2013年黑龙江和重庆农业机械发展水平对比 |
Fig. 4 Comparison of agricultural mechanization between Heilongjiang and Chongqing during 1995-2013 |