Table 6.

Enrichment factor (EF_G) of metallic elements in soils under different land use

Enrichment factor (EFG)										Grade standards for EF (birth, 2003)
Land use	As	Cd	Co	Cr	Cu	Ni	Pb	V	Zn	Value	Enrichment status
Agriculture	5.85 a	5.26	1.53	1.56	2.34	1.95	3.05	1.61	2.31	<1	No enrichment
Orchards	5.06	5.26	1.52	1.52	2.28	1.72	3.05	1.43	1.66	1–3	Minor enrichment
Rangeland	3.62	4.22	1.52	1.51	2.30	1.70	3.02	1.46	1.94	3–5	Moderate enrichment
Rocky	5.85	5.26	1.51	1.53	2.31	1.73	2.45	1.57	1.92	5–10	Moderately severe enrichment
Urban	3.47	3.90	1.51	1.49	2.17	1.69	3.05	1.51	1.86	10–25	Severe enrichment
Water	1.73	3.17	1.34	1.50	1.66	1.55	1.99	1.40	2.31	25–50	Very severe enrichment
Min.	1.73	3.17	1.34	1.49	1.66	1.55	1.99	1.40	1.66	>50	Extremely severe enrichment
Max.	5.85	5.26	1.53	1.56	2.34	1.95	3.05	1.61	2.31
Mean	4.27	4.51	1.49	1.52	2.18	1.72	2.77	1.50	2.00
SD	1.62	0.88	0.07	0.02	0.25	0.12	0.44	0.08	0.25

^aItalicized values indicate anthropogenic influences