Factor | Terms | Average marginal effect | P-value |
Pre-treatment (reference = 1 h) | 10 mn | 0.2756 | 0.0000 |
30 mn | 0.4578 | 0.0000 | |
Substrate (reference = fine sand) | Sawdust | 0.0222 | 0.5326 |
Sawdust and fine sand | 0.2481 | 0.0000 | |
Sawdust and black earth | 0.3370 | 0.0000 | |
Black earth | 0.3185 | 0.0000 |