RT Journal Article SR Electronic T1 New explanations for gully formation on farmlands in China’s Mollisols region: Fissure evidence by spring freeze-thaw actions JF Journal of Soil and Water Conservation FD Soil and Water Conservation Society SP 89A OP 91A DO 10.2489/jswc.2021.0615A VO 76 IS 5 A1 Liang-Jun Hu A1 Linlin Wang A1 Fuman Zhang YR 2021 UL http://www.jswconline.org/content/76/5/89A.abstract AB