| Level | Factors | |||
| Yeast extract | KCl | Sodium acetate | Ethanol | |
| 1 | 59.05 | 59.18 | 57.73 | 59.14 |
| 2 | 58.46 | 60.16 | 58.39 | 59.81 |
| 3 | 59.54 | 57.71 | 60.94 | 58.10 |
| Delta | 1.07 | 2.45 | 3.21 | 1.71 |
| Rank | 4 | 2 | 1 | 3 |