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. 2020 Apr 7;10:6012. doi: 10.1038/s41598-020-62919-7

Figure 6.

Figure 6

Spearman correlations between the core microbiome and environmental factors in maize cropping systems. The values of correlation coefficients are indicated according to the scale bar. Only significant (P < 0.05) and strong (correlation coefficient, r > 0.6 or <–0.6) correlations are shown; others are left blank. AN, available nitrogen; Pre, Mean annual precipitation, and; Tem, Mean annual temperature.