Biochar increases soil organic carbon and reduces global warming potential while improving crop yield by a global meta-analysis

we collected 1080 crop yields under biochar addition experiments from 143 published literature, including 648 crop yields under B and 430 crop yields under BF treatments (see and Table 1, sampling sizes).本研究从143篇已发表文献中收集了1080组施加生物炭（biochar）条件下的作物产量数据，其中包含648组B处理及430组BF处理下的作物产量数据（详见表1及样本量说明）。