Table 2. Pearson correlation coefficients (r) obtained for the linear correlations between GST and ROS and metals concentrations measured in-field experiment.

	GST	ROS	Cd	Cr	Cu	Fe	Ni	Pb	Zn
GST	1	0.989	0.889	0.935	0.616	0.927	0.412	0.956	0.024
ROS		1	0.928	0.934	0.642	0.920	0.420	0.971	0.030
Cd			1	0.951	0.685	0.942	0.529	0.937	-0.01
Cr				1	0.738	0.995	0.473	0.943	0.087
Cu					1	0.733	0.337	0.657	0.656
Fe						1	0.540	0.937	0.062
Ni							1	0.545	-0.27
Pb								1	-0.03
Zn									1

Data from all experimental sites were analyzed together. Correlations with p< 0.05 are marked in bold.