Research Article
Effects of Soil Properties on Pb, Cd, and Cu Contents in Tobacco Leaves of Longyan, China, and Their Prediction Models
Table 2
Descriptive statistics of total and bioavailable concentrations of Pb, Cd, and Cu in soils.
| Item | Sample number | Min (mg/kg) | Max (mg/kg) | Average (mg/kg) | Standard deviation | Coefficient of variation (%) | Secondary standard | Overlimit ratio (%) |
| Pb | 421 | 1.39 | 49.9 | 12.1 | 6.99 | 57.9 | 28.0 | 0.951 | Cd | 421 | 0.003 | 0.950 | 0.092 | 0.063 | 68.3 | 0.150 | 12.1 | Cu | 421 | 0.031 | 19.1 | 3.88 | 2.41 | 62.1 | 15.0 | 1.12 |
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