Biochar enhances rice rhizodeposited carbon stabilization through distinct pathways of iron association and aggregate occlusion in two contrasting paddy soils - Ruiling Ma; Yujia Yu; Ruiyu Wang; Zheng Zhao; Zuhang Shen; Qi Yi; Shaopan Xia; Rongjun Bian; Xuhui Zhang; Zhiwei Liu; Kun Cheng; Jufeng Zheng (Biology and Fertility of Soils, 2026)