PEF-MODFLOW: A framework for preliminary soil profile horizon delineation based on soil color captured by smartphone images. - Jiawei Yang 010; Feilong Shen; Tianwei Wang; Lingyun Wu; Zhaoxia Li; Nian Li; Lilong Dai; Jinghui Liang; Jian Zhang (Environ. Model. Softw., 2022)