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Table 2 Mean and standard deviation of soil samples

From: A chemical and multivariate statistical approach to assess the spatial variability of soil quality for environment around the Tamabil coal stockpile, Sylhet

Chemical parameters

Mean ± standard deviation

Range: layer one (surface, around 0.5 ft)

Mean ± standard deviation

Range: layer 2 (1.5 ft, sub-surface)

pH

4.93 ± 0.98

4.91 ± 0.94

Total nitrogen

0.28 ± 0.14

0.30 ± 0.19

OM

3.57 ± 2.01

3.23 ± 1.88

K

0.31 ± 0.27

0.46 ± 0.29

P

6.48 ± 2.50

5.5 ± 1.20

S

56.49 ± 42.66

45.02 ± 15.84

Fe

10.49 ± 5.24

10.06 ± 5.55

As

0.03 ± 0.05

0.03 ± 0.06