黄土高原安塞县生态退耕情景及农业影响

徐勇,张同升,杨勤科

Ecological De-farming Scenarios and Their Influences on Agricultural Development of Ansai County on Loess Plateau

XU Yong, ZHANG Tongsheng, YANG Qinke

地理学报 . 2006, (4): 369 -377 . DOI: 10.11821/xb200604004