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Principal component analysis (PCA) of the relationship between heavy metals (Pb, Zn, Cu, and Cd) and other soil parameters in different land-use types from Sidi Village (A) and the relationship between heavy metals (Pb, Zn, Cu, and Cd) and soil microbes in different land-use types from Sidi Village (B). Percentage explained by the axes is shown in brackets. Abbreviations are the same as those listed for Table 1.
