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10 1990-2000年和2000-2010年中国山区县森林面积变化 |
Fig. 10 Forest area changes in Chinese mountainous counties during the periods 1990-2000 and 2000-2010 |