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Table 1 Basic properties of soil collected across China

From: Organic phosphorus leaching risk from agricultural soils across China

Soils

pH

CEC

(cmol g−1)

WSS

(mS cm−1)

CaCO3

(mg kg−1)

SOM

(%)

DOC

(mg kg−1)

Total soils (n = 63)

 Min

4.47

6.23

0.01

0.81

0.35

0.04

 Max

9.18

49.6

0.95

73.7

14.8

0.36

 Mean

7.23

26.6

0.11

14.1

4.48

0.14

 SD

1.29

9.37

0.13

14.9

2.68

0.07

Paddy soils (n = 21)

 Min

4.99

14.9

0.02

1.21

0.35

0.04

 Max

8.47

41.7

0.30

41.7

5.80

0.34

 Mean

6.83b

25.6b

0.09b

11.6ab

3.91b

0.12b

 SD

1.25

6.27

0.08

12.38

1.52

0.07

Red soils (n = 11)

 Min

4.47

13.1

0.01

1.21

0.84

0.06

 Max

8.04

49.3

0.95

16.2

7.00

0.36

 Mean

6.10b

28.0ab

0.21a

6.30b

4.14b

0.16ab

 SD

1.41

9.48

0.27

5.85

1.78

0.09

Chernozem (n = 13)

 Min

6.67

15.9

0.04

0.81

3.54

0.09

 Max

8.79

46.0

0.26

73.7

14.8

0.23

 Mean

7.87a

32.6a

0.11ab

20.6a

7.34a

0.18a

 SD

0.78

9.64

0.06

22.1

3.34

0.04

Other soils (n = 18)

 Min

6.20

6.23

0.01

1.62

0.87

0.06

 Max

9.18

41.4

0.17

43.7

10.6

0.17

 Mean

7.92a

22.7b

0.08b

17.2ab

3.27b

0.11b

 SD

0.87

10.5

0.05

13.4

2.32

0.02

  1. Different letters indicate significant difference (p < 0.05) between paddy soils, red soils, chernozem, and other soils
  2. n number of soil samples, SD standard deviation, CEC cation exchangeable capacity, WSS water-soluble salt, SOM soil organic matter, DOC dissolved organic carbon