Benefits of planting green manure on soil greenhouse gas emissions and soil carbon and nitrogen pools: A three-year maize field experiment and meta-analysis - Zhenggui Zhang; Weibin Huang; Jian Wang; Sheng Zhang; Zhanlei Pan; Pengcheng Li; Guilan Sun; Junhong Li; Yaopeng Zhang; Wenqi Zhao; Menghua Zhai; Xin Li; et al. (Agriculture, Ecosystems & Environment, 2026)