Soil Characteristics

Upslope

Midslope

Footslope

Ap

(0 - 20 cm)

A₁

20 - 100 cm)

Ap

(0 - 20 cm)

A₁

(20 - 100 cm)

Ap

(0 - 20 cm)

A₁

(20 - 100 cm)

Moisture content (105˚C)

16.3

18.42

8.20

16.21

15.80

15.21

Particle density (g・cm⁻³)

2.6

2.6

2.6

2.6

2.6

2.6

Bulk density (g・cm⁻³)

1.7

1.8

1.5

1.7

1.7

1.7

Porosity (%)

34.6

30.76

42.3

34.6

34.6

34.6

Texture

55

48

23

32

26

31

10

12

34

17

20

21

35

40

43

51

54

48

Sandy clay

Sandy clay

Clay

Clay

Heavy clay

Clay

pH (H₂O)

4.3

5.3

4.4

5.2

4.6

5.8

pH (KCl)

4.0

4.9

4.3

4.9

4.4

5.4

ΔpH

0.3

0.4

0.1

0.3

0.2

0.4

Organic carbon (% dry matter)

4.8

0.79

3.7

0.46

5.1

1.86

Organic matter (%)

8.3

1.36

6.36

0.79

8.9

3.21

Total nitrogen (% dry matter)

0.42

0.03

0.08

0.04

0.56

0.12

Exchangeable cations

(cmol + kg⁻¹)

1.6

1.99

1.9

1.43

3.6

2.11

1.40

0.87

1.12

1.02

1.5

0.39

0.2

0.13

0.16

0.25

0.29

0.54

0.08

0.06

-

0.01

0.10

0.06

Sum of exchangeable bases (cmol + kg⁻¹)

5.19

3.02

3.18

2.71

5.49

3.1

CEC at pH7 (cmol + kg⁻¹)

20.9

8.6

16.05

8.11

25.6

12.08

Apparent CEC (CECapp) (cmol + kg⁻¹)

13.14

14.7

8.79

12.80

14.44

11.79

Available phosphorus (ppm)

30.9

7.01

22.1

5.11

27.06

3.97

Exchangeable Al (cmol + kg⁻¹)

1.85

0.79

0.56

0.26

1.59

0.21

Al toxicity (%)

26.27

20.73

14.97

8.75

22.45

6.34