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Table 9 Impact of geological materials on soil quality

From: Soil quality estimation using environmental covariates and predictive models: an example from tropical soils of Nigeria

Parent materials

Very high class

High class

Moderate class

Low class

Very low class

Area (ha)

%

Area (ha)

%

Area (ha)

%

Area (ha)

%

Area (ha)

%

Sandstone

12,851.01

18.24

107,533.10

23.08

96,024.87

37.54

50,898.51

42.84

8982.54

41.49

Basalt

58.23

0.08

10,107.90

2.17

14,267.34

5.58

2131.83

1.79

199.26

0.92

Basement complex

53,509.23

75.95

317,625.40

68.19

118,961.6

46.51

16,266.06

13.69

1009.08

4.66

Limestone

1826.1

2.59

7901.64

1.70

292.05

0.11

0

0.00

0.00

0.00

Shale

2212.2

3.14

22,656.33

4.86

26,227.44

10.25

49,504.41

41.67

11,457.72

52.93

Total

70,456.77

100

465,824.30

100

255,773.3

100

118,800.8

100

21,648.6

100