Parameter (%)

N.E

N.W

N.C

S.W

p-Value

BSEN 196-2 [18]

SiO₂

20.00 ± 1.60^a

19.95 ± 0.25^a

20.18 ± 1.02^a

20.16 ± 0.26^a

0.988

18.0 - 24.0

Al₂O₃

5.82 ± 0.38^a

4.98 ± 0.18^a

5.34 ± 0.09^a

5.04 ± 0.12^a

0.117

2.6 - 8.0

Fe₂O₃

2.76 ± 1.00^a

3.20 ± 0.18^a

3.67 ± 0.08^a

3.82 ± 0.21^a

0.206

1.5 - 7.0

CaO

60.18 ± 0.27^a

61.40 ± 2.65^ac

65.10 ± 0.98^b

62.75 ± 1.15^ac

0.0126

1.0 - 69.0

MgO

2.50 ± 0.10^a

2.20 ± 0.22^ab

1.93 ± 0.04^bc

2.00 ± 0.20^bc

0.009

0.5 - 4.0

SO₃

0.93 ± 0.05^a

2.02 ± 0.13^b

1.86 ± 0.14^c

1.68 ± 0.04^c

0.000

0.2 - 4.0