Level of Heavy Metals and Potential Ecological Risks in Irrigated Horticultural Farms in the Vicinity of Lake Ziway, Central Ethiopian Rift Valley Region

Table 8

Pearson’s correlation matrix between heavy metal concentrations in soils from Ziway irrigated horticultural farms.

	As	Pb	Zn	Cd	Hg	Cu	Ni	Co	Cr
As	1
Pb	0.25	1
Zn	0.92	0.24	1
Cd	0.94	0.55	0.88	1
Hg	0.85	−0.13	0.77	0.71	1
Cu	0.07	0.75	0.18	0.29	−0.17	1
Ni	0.96	0.34	0.93	0.96	0.80	0.08	1
Co	0.20	0.99	0.19	0.51	−0.15	0.75	0.30	1
Cr	0.89	0.58	0.88	0.95	0.63	0.44	0.91	0.54	1

Correlation is significant at the 0.01 level (2-tailed). Correlation is significant at the 0.05 level (2-tailed). Bold values show there is significant strong positive relationship.