Effects of Soil Properties on Pb, Cd, and Cu Contents in Tobacco Leaves of Longyan, China, and Their Prediction Models

Table 3

Heavy metal content and enrichment factors of Pb, Cd, and Cu in tobacco leaves.

ltem	Sample number	Min (mg/kg)	Max (mg/kg)	Average (mg/kg)	Standard deviation	Coefficient of variation (%)	Enrichment coefficient
Pb	421	0.430	7.08	2.33	0.765	32.9	19.3
Cd	421	0.221	13.2	4.89	1.90	38.8	54.3
Cu	421	1.23	9.15	4.35	1.16	26.6	1.07