Table 1 Process parameter levels that were utilised in the experimental design
Independent variables | Levels | ||
|---|---|---|---|
− 1 | 0 |  + 1 | |
Agar concentration (Y1, %) | 0.3 | 0.5 | 0.9 |
Light duration (Y2, hours/day) | 10 | 13 | 16 |
Culture temperature (Y3, °C) | 16 | 28 | 40 |
Relative humidity (Y4, %) | 55 | 70 | 100 |