Efficient improvement of physicochemical properties and plant growth in sandy ecological substrates: performance and mechanisms of biochar-based materials - Daxiang Liu; Yexiong Zhou; Zhihai Xu; Qiangbing Song; Yuliang Qin; Zuosen Luo; Yao Xiao; Xudong Hu; Dong Xia; Liming Liu; Mingtao Zhou; Huafeng Deng; et al. (Transportation Geotechnics, 2026)