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Estimated regression coefficients of the model developed by Plackett-Burman design (PBD).
| Term | Effect | Coef | SE Coeff | T | P-value |
|---|---|---|---|---|---|
| Constant | 206.63 | 14.13 | 14.62 | 0.000 | |
| Starch (x1) | -1.84 | -0.92 | 14.13 | -0.07 | 0.949 |
| KCl (x2) | -52.39 | -26.19 | 14.13 | -1.85 | 0.080 |
| NaNO3 (x3) | 60.73 | 30.37 | 14.13 | 2.15 | 0.045 |
| K2HPO4 (x4) | 61.34 | 30.67 | 14.13 | 2.17 | 0.044 |
| MgSO4 (x5) | -49.57 | -24.79 | 14.13 | -1.75 | 0.096 |
| pH (x6) | 107.61 | 53.80 | 14.13 | 3.81 | 0.001 |
