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. 2021 Mar 4;11:5155. doi: 10.1038/s41598-021-84673-0

Figure 4.

Figure 4

The relationships between activity of soil enzymes (blue arrows) in plots (symbols) dominated by selected grass and forb species and physicochemical substrate variables, plant diversity (H′) and vegetation biomass (both red arrows) on coal mine spoil heaps (Mgav available magnesium, H′ Shannon–Wiener diversity index, Pav available phosphorus, SOC soil organic carbon, WHC water holding capacity).