Variables

ST 1

ST 2

ST 3

Overall mean

Range

Zn (ppm)

6.33 ± 0.75^a

1.85 ± 0.16^b

1.35 ± 0.0.27^b

1.77 ± 0.53

1.35 - 6.33

Cr (ppm)

0.62 ± 0.15^a

0.86 ± 0.19^a

0.47 ± 0.06^b

0.65 ± 0.21

0.47 - 0.86

Pb (ppm)

0.27 ± 0.19^a

0.15 ± 0.06^b

0.15 ± 0.05^b

0.19 ± 0.11

0.15 - 0.27

Fe (ppm)

1.68 ± 0.31^a

1.53 ± 0.41^a

1.20 ± 0.25^a

1.52 ± 0.34

1.20 - 1.68