Growing media | Compositions | Number of minitubers initiated |
D1 | 0.25% NPK | 5.0 ± 0.0a |
D2 | 0.5% NPK | 3.3 ± 0.3ab |
D3 | 0.75% NPK | 4.0 ± 1.1a |
Control | water | 0.0 ± 0.0b |
P-value |
| 0.01 |