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. 2016 Jun 15;7:902. doi: 10.3389/fmicb.2016.00902

Figure 4.

Figure 4

Correlational analyses between the relative abundance of each N cycling gene and the soil physico-chemical properties. The heatmap displays significant positive (ρ > 0) and negative (ρ < 0) Spearman's correlations. *P < 0.05 and **P < 0.01.