Table 5 Chemical properties of different biochar types.

Straw rice

400

8.2^d

1.48^d

66.0^a

38.3^a

0.9^c

0.6^a

47.6^a

241.3^a

10.9^a

1124^b

3568^a

600

8.3^d

2.07^e

85.9^d

49.8^d

0.7^b

1.3^b

58.6^b

254.9^b

11.2^a

1231^d

4235^b

800

9.4f.

2.90f.

90.5^de

52.5^de

0.4^a

1.6^c

62.3^b

264.2^b

13.2^b

1329^e

4360^c

Sawdust

400

7.3^b

0.94^a

74.8^c

43.4^c

1.4^ef

1.3^b

65.5^bc

491.6 ^g

21.4^c

1034^a

9752^d

600

7.5^b

1.16^b

94.5^e

54.8f.

1.0^c

2.5f.

106.2f.

546.1ⁱ

25.5^d

1046^a

9854^d

800

7.6^bc

1.52^d

96.7f.

56.1f.

0.5^a

2.7 ^fg

121.3 ^h

573.3^j

27.8^e

1109^b

10138^e

Sugar Cane

400

6.6^a

0.82^a

87.8^d

50.9^d

1.9 ^g

2.2^e

77.3^e

513.1 ^h

47.2ⁱ

1604 ^g

11235 ^h

600

7.5^b

1.03^ab

97.2f.

56.4f.

1.8 ^g

3.1ⁱ

117.0 ^g

621.5 ^k

48.4ⁱ

1624 ^g

11561ⁱ

800

8.9^e

1.27^bc

98.1f.

56.9 ^fg

1.3^e

3.5^j

134.6ⁱ

649.0 ^l

51.7^j

1703 ^h

12060^j

Tree Leaves

400

8.7^e

2.11^e

71.0^b

41.2^b

1.5f.

1.8^d

59.6^b

353.7^c

30.7^e

1204^c

10334f.

600

9.2f.

2.95f.

90.7^e

52.6^e

1.2^e

2.6f.

67.1^c

421.2^d

33.1^e

1324^e

10609 ^g

800

10.4 ^g

3.46 ^g

95.5^ef

55.4f.

0.7^b

2.9 ^h

70.9^d

444.9f.

39.0 ^h

1509f.

11241 ^h