| n-HAP concentration | pH | OM (g·kg−1) | ||||
| Range | Average | CV | Range | Average | CV | |
| 0% | 3.97 - 4.20 | 4.05 a | 2.08% | 17.8 - 21.7 | 19.3 a | 7.55% |
| 5% | 5.25 - 6.00 | 5.64 b | 4.32% | 16.2 - 21.9 | 18.1 a | 12.1% |
| 7% | 5.82 - 6.03 | 5.90 c | 1.24% | 14.4 - 23.7 | 18.6 a | 18.5% |
| 10% | 5.92 - 6.13 | 5.99 c | 1.25% | 16.2 - 20.2 | 17.8 a | 9.85% |