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Table 5 Chemical properties of the soils sampled from Eniwa and Narita farms

From: Characterisation of soils under long-term crop cultivation without fertilisers: a case study in Japan

Horizon

pH

OC

TN

Exchangeable cation (cmolc kg−1)

CEC (cmolc kg−1)

Base-satu. (%)

\({\text{NO}}_{3}^{ - }\) (mg kg−1)

Available P (mg kg−1)

P absorption (mg 100 g−1)

H2O

KCl

(g kg−1)

Ca2+

Mg2+

K+

Na+

E-UF

 Ap

6.2

5.07

55.2

3.4

9.78

0.93

0.41

0.04

17.8

62.7

9.88

112.0

970

 A1

6.1

5.05

56.1

3.4

10.01

0.94

0.21

0.06

17.3

64.9

9.25

119.6

1170

 A2

6.0

4.96

53.9

3.2

9.53

0.84

0.14

0.06

18.6

57.0

9.39

84.1

1314

 2A3

5.4

4.48

168.8

9.4

7.14

0.30

0.33

0.17

51.5

15.4

23.36

n.d.

2924

 3AB

5.6

4.93

74.5

4.8

3.36

0.23

0.38

0.08

27.3

14.9

15.35

n.d.

2707

 4Bw

5.7

5.40

20.3

1.5

2.27

0.23

0.09

0.12

11.0

24.7

15.16

n.d.

2123

E-CF

 Ap1

6.5

5.30

44.8

2.7

12.54

0.94

0.45

0.05

18.7

74.7

4.10

233.1

1223

 Ap2

6.3

5.27

40.5

2.5

14.05

1.45

0.28

0.05

20.2

78.2

5.80

293.2

1282

 Ap3

6.4

5.37

54.1

3.1

13.94

1.25

0.24

0.05

19.8

78.2

3.55

270.8

1386

 2A

5.6

4.66

163.2

9.1

10.43

0.72

0.35

0.09

45.6

25.4

4.36

n.d.

2876

 3AB

5.7

5.23

39.6

2.8

2.42

0.24

0.35

0.06

17.5

17.5

3.21

n.d.

2570

 4Bw

5.7

5.49

11.9

0.9

1.38

0.11

0.23

0.07

7.1

25.4

3.43

n.d.

1729

N-UF

 Ap

5.6

4.32

38.0

3.0

8.89

2.85

0.74

0.13

28.7

44.0

15.08

244.6

1561

 A1

5.6

4.28

35.2

2.7

8.24

2.84

0.40

0.15

28.4

40.9

3.35

77.1

1522

 A2

6.0

4.74

30.9

2.4

13.17

3.14

0.28

0.49

30.3

56.3

2.80

n.d.

2052

 AB

5.9

4.84

38.4

2.8

10.01

2.10

0.12

0.41

30.6

41.3

3.46

n.d.

2466

 Bw1

5.9

5.37

28.5

2.5

7.53

1.38

0.13

0.19

24.8

37.2

10.13

n.d.

2723

 Bw2

6.2

5.66

15.7

1.4

6.99

1.62

0.14

0.20

22.0

40.7

10.56

n.d.

2939

N-CF

 Ap

6.4

5.09

43.0

3.3

15.02

3.71

1.79

0.09

35.4

58.3

9.06

201.9

1572

 A1

6.1

4.76

34.1

2.5

11.37

2.81

1.57

0.09

23.2

68.3

3.57

68.1

1614

 A2

5.6

4.82

41.4

2.7

12.80

2.88

1.67

0.19

34.4

51.0

3.70

n.d.

2147

 AB

5.9

5.12

34.6

2.6

6.00

2.21

0.25

0.24

29.1

29.9

13.44

n.d.

2518

 Bw

5.9

5.45

22.6

2.0

10.46

1.31

0.11

0.13

21.2

56.6

21.40

n.d.

2681

  1. n.d. not detected