Table 1 Doses of tested materials
| Â | NB | AB | H | H2O |
|---|---|---|---|---|
Control | – | – | – | 100 mL |
Non-activated biochar (NB) | 32 g | – | – | 100 mL |
Humac (H) | – | – | 1 mL | 99 mL |
Non-activated biochar + Humac (NB + H) | 32 g | – | 1 mL | 99 mL |
Aged biochar (AB) | – | Equal to 32 g of NB | – | 100 mL |