Figure 2 | Scientific Reports

Figure 2

From: Identification of heavy metal pollutants and their sources in farmland: an integrated approach of risk assessment and X-ray fluorescence spectrometry

Figure 2

ERi and PER of HMs in various villages. Green horizontal reference lines represent the corresponding classification criteria of \({E}_{r}^{i}\) (40, 80, 120, 320); Red horizontal reference lines represent the corresponding classification criteria of PER (150, 300, 600, 1200). Boxes represent the 25th and 75th percentiles, the whiskers represent the 5th and 95th percentiles, and the hollow squares represent means.

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