. 2013 Jun 26;185(12):9871–9888. doi: 10.1007/s10661-013-3298-9

Table 1.

Descriptive statistics of soil properties and heavy metals

Variable	Symbol	Unit	Descriptive statistics
Variable	Symbol	Unit	Range	G. Mean	SD	CV (%)	Kurtosis	Skewness	K–S test
Arsenic	As	mg kg⁻¹	1.00–37.35	6.53	5.63	86.22	4.49	1.53	0.055
Cadmium	Cd	mg kg⁻¹	0.40–2.60	0.81	0.716	88.40	−1.19	0.60	0.015
Logarithm of Cd			−0.92–0.96	0.64	0.711	111.09	−1.7	0.27	0.057
Cobalt	Co	mg kg⁻¹	8.10–27	17.27	3.56	20.61	0.19	0.013	0.394
Chromium	Cr	mg kg⁻¹	30–140	83.95	22.90	27.28	−0.38	−0.012	0.58
Copper	Cu	mg kg⁻¹	13.50–57	32.91	9.16	27.83	−0.38	0.15	0.9
Iron	Fe	mg kg⁻¹	1.80–5.10	3.66	0.66	18.03	0.11	−0.41	0.7
Nickel	Ni	mg kg⁻¹	26–110	60.97	17.73	29.08	−0.25	0.22	0.95
Lead	Pb	mg kg⁻¹	13–57	23.93	5.34	22.32	9.96	1.88	0.094
Vanadium	V	mg kg⁻¹	50–150	101.6	21.11	20.78	.138	−0.28	0.019
Logarithm of V			3.91–5.01	4.61	0.22	4.77	1.37	−1.0	0.064
Zinc	Zn	mg kg⁻¹	35–150	74.78	17.48	23.38	1.69	0.69	0.674
pH	pH	–	7.23–8.37	7.78	0.22	2.83	0.20	0.10	0.53
Electrical conductivity	EC	dS m⁻¹	0.48–38.80	1.27	3.54	278.74	92.97	9.04	0.00
Logarithm of EC			−0.73–3.66	0.33	0.67	203.03	4.64	1.68	0.072
Organic matter	OM	%	0.03–2.69	0.45	0.50	111.11	4.27	1.89	0.023
Logarithm of OM			−3.51–0.99	0.63	0.93	147.62	1.34	−0.98	0.23
Clay content	Clay	%	1.46–66.63	26.88	13.49	50.19	−0.48	0.26	0.611
Sand content	Sand	%	2.99–66.92	23.86	9.96	41.74	1.42	−0.59	0.723
Silt content	Silt	%	12.65–54.15	42.38	8.41	19.84	0.087	0.45	0.574

SD standard deviation, G. Mean geometric means (geometric means were used to describe the central trend of data), CV coefficient of variation, K–S test Kolmogorov–Smirnov test (K–S > 0.05 data is normal)