Pb-Contaminated Soil from Quintero-Ventanas, Chile: Remediation Using Sarcocornia neei

Table 7

Correlations matrix between soil variables.

Correlation matrix		pH at 25°C	Electric conductivity at 25°C (dS/m)	Organic material (%)	N (mg/kg)	Fe (mg/kg)	Cu (mg/kg)	Pb (mg/kg)	As (mg/kg)	Hg (mg/kg)
pH a 25°C	Pearson’s r	—
	value	—
Electric conductivity at 25°C (dS/m)	Pearson’s r	−0.347	—
	value	0.500	—
Organic material %	Pearson’s r	−0.354	−0.011	—
	value	0.491	0.984	—
N (mg/kg)	Pearson’s r	−0.114	0.188	0.668	—
	value	0.829	0.721	0.147	—
Fe (mg/kg)	Pearson’s r	−0.280	−0.202	0.931	0.438	—
	value	0.590	0.701	0.007	0.385	—
Cu (mg/kg)	Pearson’s r	−0.642	−0.174	0.869	0.468	0.820	—
	value	0.169	0.742	0.024	0.349	0.046	—
Pb (mg/kg)	Pearson’s r	−0.299	−0.201	0.979	0.661	0.934	0.895	—
	value	0.564	0.703	<0.001	0.153	0.006	0.016	—
As (mg/kg)	Pearson’s r	−0.442	−0.173	0.970	0.573	0.941	0.951	0.984	—
	value	0.380	0.743	0.001	0.235	0.005	0.004	<0.001	—
Hg (mg/kg)	Pearson’s r	0.181	−0.364	0.564	0.563	0.386	0.492	0.633	0.546	—
	value	0.731	0.479	0.244	0.245	0.449	0.322	0.178	0.262	—

The Jamovi project (2019); R Core Team (2018). Significant association at 5%; association significant at 0.5%; association significant at 0.1%.