Spatial variability of soil nutrients and its affecting factors at small watershed in gully region of the Loess Plateau
YANG Jing-han, LIU Meng-yun, ZHANG Jie, ZHANG Meng-meng, CAO Run-shan, CAO Xin-yue
JOURNAL OF NATURAL RESOURCES . 2020, (3): 743 -754 .  DOI: 10.31497/zrzyxb.20200318