| Test no. | Statistical symbol | Boric acid concentration (%) | |||
|---|---|---|---|---|---|
| 0 (control) | 3 | 5 | 7 | ||
| Retention rate (kg/m3) | |||||
| 1 | Mean | - | 5.37 | 8.22 | 9.06 |
| SD | - | 0.76 | 1.22 | 0.38 | |
| 2 | Mean | - | 10.06 | 16.26 | 20.69 |
| SD | - | 0.89 | 2.13 | 3.89 | |
| 3 | Mean | - | 5.70 | 8.44 | 11.31 |
| SD | - | 0.63 | 0.99 | 0.74 | |
| Moisture content (%) | |||||
| 1 | Mean | 13.45 | 12.52 | 12.63 | 13.36 |
| SD | 0.31 | 0.38 | 0.77 | 0.52 | |
| 2 | Mean | 11.79 | 12.18 | 13.05 | 12.08 |
| SD | 0.66 | 0.67 | 1.22 | 0.50 | |
| 3 | Mean | 14.10 | 14.21 | 13.56 | 13.50 |
| SD | 0.36 | 0.42 | 0.38 | 0.43 | |