Table 5.
Summary statistics of heavy metal contents in crops (N = 1822).
| Content | Cr (mg/kg) | Pb (mg/kg) | Cd (mg/kg) | Hg (mg/kg) | As (mg/kg) | Cu (mg/kg) | Zn (mg/kg) | Ni (mg/kg) |
|---|---|---|---|---|---|---|---|---|
| Mean | 0.44 | 0.05 | 0.05 | 0.02 | 0.16 | 1.97 | 14.22 | 0.39 |
| Median | 0.20 | 0.04 | 0.03 | 0.00 | 0.05 | 2.10 | 17.00 | 0.26 |
| Std. | 0.75 | 0.09 | 0.06 | 0.02 | 0.41 | 1.57 | 10.93 | 0.49 |
| Skewness | 5.50 | 9.66 | 5.16 | 2.277 | 8.15 | 1.86 | 0.13 | 4.53 |
| Kurtosis | 57.42 | 130.12 | 59.09 | 8.338 | 98.52 | 15.37 | −1.29 | 44.94 |
| CV (%) | 170.45 | 180.00 | 120.00 | 120.80 | 256.25 | 79.70 | 76.86 | 125.64 |
| Min | 0.01 | 0.01 | 0.01 | 0.01 | 0.01 | 0.10 | 0.39 | 0.01 |
| Max | 13.00 | 1.50 | 1.10 | 0.024 | 6.80 | 21.00 | 56.00 | 7.80 |