Figure 2.
The linear regression relationship between mean annual precipitation and either Shannon-Wiener index (A) or operational taxonomic unit (OTU) richness (B) of soil bacterial communities in maize cropping systems (n = 21).
The linear regression relationship between mean annual precipitation and either Shannon-Wiener index (A) or operational taxonomic unit (OTU) richness (B) of soil bacterial communities in maize cropping systems (n = 21).