Mechanisms and sources of organic carbon accrual in deep soil under long-term straw return - Wenhao Feng; Jie Zhou; Antonio Rafael Sánchez-Rodríguez; Yakov Kuzyakov; Ji Chen; Shang Wang; Haoruo Li; Jing Wang; Hongyuan Zhang; Roland Bol; Yuyi Li; Leanne Peixoto (Soil and Tillage Research, 2026)