Research on changes in grain production pressure and protection strategies in the black soil region of Northeast China under the influence of international grain trade
DENG Xiang-zheng, LIANG Li, LIAO Xiao-yong, LIU Yu-jie, LI Zhi-hui, YUE Tian-xiang, DONG Jin-wei, SUN Zhi-gang, CHEN Ming-xing
JOURNAL OF NATURAL RESOURCES . 2022, (9): 2209 -2217 .  DOI: 10.31497/zrzyxb.20220901