Spatiotemporal Changes and Driving Factors of Cultivated Soil Organic Carbon in Northern China's Typical Agro-Pastoral Ecotone in the Last 30 Years. - Liping Wang; Xiang Wang; Dianyao Wang; Beisong Qi; Shufeng Zheng; Huanjun Liu; Chong Luo; Houxuan Li; Linghua Meng; Xiangtian Meng; Yihao Wang (Remote. Sens., 2021)