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Table 1 The value of different chemical parameters and their max, min, mean, and standard deviation as well as standard reference value for respective parameter

From: Assessment of soil quality for agricultural purposes around the Barapukuria coal mining industrial area, Bangladesh: insights from chemical and multivariate statistical analysis

Variables

Max

Min

Mean

Standard deviation

Standard reference value

pH

6.83

4.97

5.74

0.53

6.50

‘Total Nitrogen’ %

0.21

0.06

0.12

0.04

0.27–0.36

‘Organic Matter’ %

3.71

1.08

2.14

0.63

0.63

K, ppm

12.81

1.72

5.95

2.45

0.27–0.36

P, ppm

65.29

2.84

23.20

14.55

22.51–30.00

S, ppm

127.75

2.26

24.14

23.48

22.51–30.00

Fe, ppm

24.37

1.27

14.06

7.72

9.10–12.00

As, ppm

0.03

0.00

0.01

0.01

0.01

Cu, ppm

2.14

0.25

1.01

0.44

0.45–0.60

Ni, ppm

1.28

0.10

0.49

0.24

–

Total alkalinity (as CaCO3)

150

10

59.67

33.78

–