Parameter

pH

EC

ORP

Fe

Mn

As

pH

1.000

EC

‒0.332^**

1.000

ORP

0.052

‒0.664^**

1.000

Fe

‒0.534^**

0.591^**

‒0.570^**

1.000

Mn

‒0.402^**

0.654^**

‒0.447^**

0.656^**

1.000

As

‒0.169

0.463^**

‒0.492^**

0.384^**

0.447^**

1.000