Thresholds in aridity and soil carbon-to-nitrogen ratio govern the accumulation of soil microbial residues

We extensively searched the Web of Science (http://apps.webofknowledge.com) and the China Knowledge Resource Integrated Database (http://www.cnki.net) for scientific articles on microbial residues. Data were collected from field trials published before December 2020. Search terms were “amino sugars” or “microbial necromass” or “microbial residues,” combined with “grassland” or “forest” or “woodland”.