Table 1 BBFs composition (average ± standard deviation (n = 3)) and usage. Composition data are expressed on dry weight basis except for total solids and pH.

Characterisation

Total solids (%)

52.8 ± 0.7

26.2 ± 0.4

90.3 ± 1.1

pH (pH unit)

7 ± 0

7.4 ± 0.1

9.1 ± 0.1

Total organic C (%)

17 ± 1

37 ± 2

54 ± 3

Total N (%)

2.8 ± 0.1

2.1 ± 0.1

2.7 ± 0.1

Total P (%)

0.6 ± 0

1.1 ± 0.2

2.2 ± 0.1

Total K (%)

1.2 ± 0.1

1.7 ± 0.1

7.3 ± 0.2

Usage

Amount (g)

2.1

2.8

16

Additional N fertilization (g_UREA)

–

–

0.13

Additional K fertilization (g_K2SO4)

0.15

0.11

0.22