[Retracted] Chemical Characteristics of Coil Heavy Metal Elements and Ecological Security Risks Caused by Fertilization

Table 3

Principal component analysis results of soil heavy metals.

Heavy metal	The principal components
	1	2	3
Ni	0.932	0.177	0.059
V	0.906	0.098	0.017
Cr	0.899	−0.010	−0.036
As	0.524	0.413	0.245
Cd	0.111	0.878	0.069
Pb	−0.023	0.852	0.078
Zn	0.233	0.825	0.074
Hg	0.036	0.128	0.977
The eigenvalue	3.467	1.899	0.914
Variance (%)	43.342	23.743	11.427
Cumulative variance (%)	43.342	67.085	78.511