北京市耕地表层土壤有机碳分布及其影响因素
孔祥斌, 胡莹洁, 李月, 段增强

Distribution and influencing factors of soil organic carbon of cultivated land topsoil in Beijing
KONG Xiangbin, HU Yingjie, LI Yue, DUAN Zengqiang
图1 北京市行政区划及数字高程图
Figure 1 Administrative division and digital elevation model (DEM) of Beijing Municipality