Changes in Cultivated Land and Influencing Factors before and after the Implementation of Grain forGreen Project in Zhangjiakou City
LIU Chao, HUO Yong-wei, XU Yue-qing, HUANG An, SUN Pi-ling, LU Long-hui
JOURNAL OF NATURAL RESOURCES . 2018, (10): 1806 -1820 .  DOI: 10.31497/zrzyxb.20170965