Fig. 7From: Combined metagenomics and metabolomic analysis of microbial community structure and metabolic function in continuous soybean cropping soils of Songnen Plain, ChinaMetabolite PLS-DA analysis (a) and differential metabolite volcano plots of SC2 vs. SMR (b), SC8 vs. SMR (c), SC8 vs. SC2 (d). SMR maize–soybean rotation, SC8 8-year soybean continuous cropping, SC2 2-year maize, 2-year soybean rotation croppingBack to article page