Group

pH

Ca²⁺

Mg²⁺

Na⁺

K⁺

Cl⁻

Fe

A (N = 30)

−0.445^*

0.758^**

0.846^**

0.224

0.570^**

0.461^*

−0.063

−0.136

0.076

0.231

B (N = 45)

−0.033

0.139

−0.110

0.007

0.194

0.058

−0.098

0.137

−0.356^*

−0.121

C (N = 16)

0.222^*

0.573^**

0.697

−0.231

−0.037

−0.354

−0.326

0.370

0.427

0.549^*