Table 1 Selected physiochemical properties of soils and biochar (Hailegnaw et al., 2019b).

Localization

50°07′40″N, 14°22′35″E

50°08′40″N, 16°30′50″E

–

Soil type

Chernozem

Cambisol

–

pH^§

6.90

4.80

9.50

CEC (mmol kg⁻¹)

249.3 ± 4.0

74.9 ± 3.7

102 ± 5.2

Total N (%)

0.16 ± 0.00

0.20 ± 0.00

0.40 ± 0.02

Organic carbon (%)

1.61 ± 0.1

1.60 ± 0.0

–

C/N ratio

13.2 ± 0.16

9.96 ± 0.16

219.98 ± 12.9

DOC (mg kg⁻¹)^§

13.4 ± 4.3

63.6 ± 2.0

–

N–NH₄⁺ (mg kg⁻¹)^§

5.7 ± 0.8

23.5 ± 3.2

–

Available P (mg kg⁻¹)^§

6.23 ± 0.17

2.36 ± 0.07

n.d

Available K (mg kg⁻¹)^§

65 ± 0.21

31.7 ± 0.59

2278 ± 66

Available Mg (mg kg⁻¹)^§

77 ± 0.86

21.1 ± 0.2

192 ± 11

Available S (mg kg⁻¹)^§

25.4 ± 1.81

17.2 ± 0.1

32 ± 1.6

P (mg kg⁻¹)^¥

955 ± 12.5

530 ± 12.0

496 ± 0.22

K (mg kg⁻¹)^¥

6680 ± 113

3816 ± 158

2670 ± 225

Ca (mg kg⁻¹)^¥

9987 ± 64.8

1607 ± 32.8

6676 ± 586

Mg (mg kg⁻¹)^¥

4940 ± 12.9

2332 ± 68.0

1176 ± 71.9

S (mg kg⁻¹)^¥

227 ± 13.9

150 ± 5.4

127 ± 11.6

Exch.Ca²⁺ (mmol kg⁻¹)

253 ± 3.7

72 ± 0.6

176 ± 13.5

Exch. K⁺ (mmol kg⁻¹)

4.6 ± 0.1

1.6 ± 0.1

50.4 ± 0.3

Exch. Mg²⁺ (mmol kg⁻¹)

11.8 ± 0.3

2.7 ± 0.1

23.2 ± 7.3

Sand (%)

13.16

26.08

–

Silt (%)

60.05

59.82

–

Clay (%)

26.77

14.08

–

Textural class

Silt clay Loam

Silt Loam

–