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Table 3 Chemical element concentration and sodicity levels of the Melaleuca forest soils in the study areas

From: An assessment of the carbon stocks and sodicity tolerance of disturbed Melaleuca forests in Southern Vietnam

Forest types

Soil layers (cm)

pH(KCl)

Ca2+ (meq/100 g)

Mg2+ (meq/100 g)

Na+ (meq/100 g)

K+ (meq/100 g)

Al3+ (meq/100 g)

Fe3+ (mg/100 g)

ESP (%)

Sodicity

Mean

SE

Mean

SE

Mean

SE

Mean

SE

Mean

SE

Mean

SE

Mean

SE

Mean

SE

Primary Melaleuca on sandy soil (VS1)

0–10

3.97

0.15

1.413

0.75

1.783

1.58

1.790

1.56

0.600

0.47

0.910

0.29

3.303

1.20

32.05

4.28

High

10–30

4.12

0.17

1.065

0.41

1.138

1.02

1.708

1.58

0.383

0.33

0.660

0.24

7.310

2.23

39.78

7.90

High

Regenerating Melaleuca on sandy soil (VS2)

0–10

3.68

0.03

0.690

0.10

0.310

0.10

0.310

0.15

0.155

0.02

1.860

0.14

1.615

0.36

21.16

7.82

High

10–30

3.86

0.04

0.645

0.03

0.175

0.00

0.150

0.02

0.065

0.02

1.280

0.24

1.810

0.56

14.49

2.28

Moderate

Degraded secondary Melaleuca on clay soil with peat (VS3)

0–10

4.12

0.25

7.585

1.82

6.320

1.81

1.705

0.81

0.455

0.19

0.100

0.10

37.155

17.63

10.61

2.37

Moderate

10–30

4.07

0.32

7.585

2.96

5.795

2.59

1.470

0.41

0.705

0.07

1.680

1.64

48.245

7.19

9.45

1.09

Low

Regenerating Melaleuca on clay soil with peat (VS4)

0–10

4.67

0.19

8.845

0.55

6.685

0.58

1.760

0.51

0.585

0.27

0.00

0.00

47.550

16.06

9.85

3.05

Low

10–30

5.00

0.04

5.855

0.33

4.860

0.42

1.320

0.19

0.575

0.18

0.00

0.00

54.825

36.49

10.47

1.27

Moderate

Regenerating Melaleuca on clay soil without peat (VS5)

0–10

4.16

0.26

11.580

4.19

5.557

0.55

1.330

0.24

0.663

0.07

5.533

5.53

67.433

9.03

6.95

0.49

Low

10–30

3.91

0.40

8.603

1.65

5.170

0.08

1.507

0.24

0.717

0.09

8.000

7.02

78.440

10.37

9.42

0.37

Low

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Carbon Balance and Management

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