Effects of Nitrogen Addition and Mowing on Plant–Soil Stoichiometric Characteristics and Homeostasis in Degraded Grasslands Dominated by Sophora alopecuroides L. - Wu, Yunhao; Cui, Dong; Liu, Shuqi; Jiang, Zhicheng; Liu, Zezheng; Liu, Luyao; Han, Yaxin; Guo, Jinfeng; Yang, Haijun (Agronomy, 2026)