A case-based method of selecting covariates for digital soil mapping
LIANG Peng, QIN Cheng-zhi, ZHU A-xing, HOU Zhi-wei, FAN Nai-qing, WANG Yi-jie
Journal of Integrative Agriculture . 2020, (8): 2127 -2136 .  DOI: 10.1016/S2095-3119(19)62857-1