Region

pH

Exch. Ca2+ [cmol(1/2Ca2+) kg−1]

Exch. Ma2+ [cmol(1/2Mg2+ kg−1]

Low

(%)

Suitable

(%)

High

(%)

Low

(%)

Suitable

(%)

High

(%)

Low

(%)

Suitable

(%)

High

(%)

Xuanzhou

33.33

52.38

14.28

54.76

28.57

16.66

76.19

14.29

9.52

Langxi

72.73

18.18

9.09

90.91

0

9.09

54.55

36.36

9.09

Jingde

28.57

71.43

0

61.90

33.33

4.76

57.14

38.10

4.76

Jing

31.03

48.28

20.69

55.17

24.14

20.69

72.41

24.14

3.45

Guangde

46.15

53.85

0

69.23

23.08

7.69

84.62

7.69

7.69

Ningguo

37.50

62.50

0

75.00

25.00

0

100.00

0

0

Total

37.10

52.42

10.49

62.10

25.00

12.9

72.58

20.97

6.45