Association of arsenic and other common heavy metals in the agricultural soils from the CAFO zone and the Pearl River Delta revealed by multivariate analyses: (a)
hierarchical dendogram for heavy metals in the CAFO zone; (b) hierarchical dendogram for heavy metals in the Pearl River Delta; (c) 3-D plots for PCA loadings of heavy
metals in the CAFO zone; and (d) 3-D plots for PCA loadings of heavy metals in the Pearl River Delta.