Horizon

Depth (cm)

Sand

g∙kg⁻¹

Silt

g∙kg⁻¹

Clay

g∙kg⁻¹

BD g∙cm⁻³

MC

(%)

pH

KCl

OC

g∙kg⁻¹

AVP mg∙kg⁻¹

TEB

cmol/ kg

TEA cmol/ kg

ACEC

cmol/ kg

BS

(%)

Coastal plain

A

0 - 22

870.2

29

100.8

1.00

61.2

4.21

6.97

10.2

5.13

1.21

12.25

82.34

AB

22 - 44

869.6

32.8

97.6

1.01

72

4.16

6.73

7.50

4.26

0.35

8.36

92.4

Bt1

44 - 72

849.6

12.8

137.6

1.18

74.75

4.11

5.92

7.66

4.57

0.34

8.82

93.08

Bt2

72 - 100

820.8

39

140.2

1.24

66.06

4.32

5.72

5.30

3.07

0.39

4.40

88.7

Bt3

100 - 180

849.6

32.8

117.6

1.28

51.70

4.22

5.34

6.70

3.05

0.28

4.25

91.6

MEAN

851.96

29.28

118.8

1.14

65.14

4.20

6.14

7.47

4.02

0.51

7.62

89.62

SD

20.16

9.89

19.91

0.1301

9.17

0.078

0.69

1.79

0.93

0.391

3.35

4.401

CV%

2.37*

33.74**

16.76**

11.40*

14.08*

1.86*

11.24*

23.93**

23.08**

76.08***

44.11***

4.91*

Imo clay shale

A

0 - 19

629.6

192.8

177.6

1.13

51.8

3.86

15.20

16.6

4.7

1.54

12.21

73.32

AB

19 - 42

549.6

312.8

137.6

1.18

50

4.00

12.80

13.5

2.71

1.5

8.62

64.37

Bt1

42 - 82

529.6

112.8

357

1.24

51.48

4.44

9.20

10.8

4.82

2.08

12.98

69.85

Bt2

82 - 133

769.6

12.8

217.6

1.26

33.24

4.03

8.60

8.6

2.82

2.00

8.84

58.51

Bt3

133 - 180

549.6

232.8

217.6

1.35

36.51

3.80

7.30

9.7

3.63

1.80

10.86

66.90

MEAN

605.6

172.8

221.5

1.23

44.60

4.03

10.62

11.84

3.74

1.78

10.70

66.59

SD

99.39

114.89

82.69

0.084

8.98

0.25

3.273

3.224

1.001

0.262

1.95

5.61

CV%

16.41**

66.49***

37.43***

6.78*

20.14*

6.22*

30.82**

27.33**

26.79**

14.69*

18.27**

111.50***

Asu River

A

0 - 15

889.6

92.8

17.6

1.32

333.8

3.85

7.66

19.80

6.07

1.23

15.52

83.15

C

15 - 35

669.6

292.8

37.6

1.48

352.6

3.42

5.21

12.10

5.06

1.00

12.16

83.49

R

35

MEAN

779.6

192.8

27.6

1.40

343.2

3.64

6.43

15.95

5.56

1.12

13.80

83.32

SD

155.5

141.42

14.142

0.113

13.29

0.304

1.73

5.5

0.714

0.163

2.4

0.2404

CV%

19.95**

73.35***

51.24***

8.08*

3.87*

8.37*

26.92***

34.14**

12.83*

14.59*

17.17**

0.29*