Microbial metabolism decline in degraded grasslands depends on soil organism size - Yang Hu; Mengfei Cong; Tianle Kou; Han Yan; Xinya Sun; Haolin Zhang; Yakov Kuzyakov; Yang Yang; Yimei Huang; Yanxing Dou; Zhaolong Zhu; Baorong Wang; et al. (Agriculture, Ecosystems & Environment, 2026)