| Sample Source | Moisture (% w.b.) | Pressure to Reach 350 kg/m3 (kPa) | Specific Energy Requirement (kJ/kg) |
| Penn State Univ. Agronomy Farm (Fall Harvesting) | 4.7 | 529.1* | 2.3* |
| 12.6 | 501.5 | 2.3 | |
| 20.6 | 512.3 | 2.4 | |
| 22.8 | 576.3 | 2.5 | |
| 22.8 | 519.9 | 2.4 | |
| 31.4 | 372.5 | 1.7 | |
| 48.8 | 638.3 | 2.3 | |
| Ernst PA Farm (Spring Harvesting) | 7.3 | 1305.5 | 5.8 |