Physical rather than chemical protection determines soil organic carbon accumulation in a subtropical Chinese fir plantation treated by litter manipulation - Qiao Liu; Xiangjiang Liu; Zhigao Liao; Shengnan Wang; Junjie Huang; Yiqi Luo; Lifen Jiang; Geoff G. Wang; Huiming Wang; Fu-Sheng Chen (Plant and Soil, 2025)