Environmental Systems Research

Table 5 Correlation coefficient among metals and properties of soil

From: Bioaccumulation of heavy metals in soil and selected food crops cultivated in Kogi State, north central Nigeria

	pH	TOC	TOM	Cu	Zn	Pb	Cd	Ni	Co
pH	1
TOC	−0.096	1
TOM	−0.095	1.000^b	1
Cu	−0.113	0.043	0.043	1
Zn	−0.107	0.029	0.030	0.519^b	1
Pb	0.164	−0.171	−0.171	0.300^b	0.168	1
Cd	−0.053	0.069	0.070	0.409^b	0.238^a	0.061	1
Ni	−0.107	0.142	0.143	0.514^b	0.486^b	0.193	0.95	1
Co	0.167	−0.029	−0.028	0.752^b	0.390^b	0.346^b	0.364^b	0.644^b	1

^aCorrelation is significant at the 0.05 level (2-tailed)
^bCorrelation is significant at the 0.01 level (2-tailed)

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