pH

EC

Pb

Cd

Zn

Cu

Fe

pH

1

0.723^**

0.870^**

1

−0.461

0.386

−0.160

EC

0.723^**

1

0.850^**

0.553

0.069

0.699^*

−0.267

Pb

0.870^**

0.850^**

1

0.799^**

−0.136

0.687^*

−0.073

Cd

0.570

0.553

0.799^**

1

0.113

0.710^**

0.229

Zn

−0.461

0.069

−0.136

0.113

1

0.449

−0.009

Cu

0.386

0.699^*

0.687^*

0.710^**

0.449

1

−0.032

Fe

−0.160

−0.267

−0.073

0.229

−0.009

−0.032

1