Lowest density (1,236/ha at 70 years) yield table for lodgepole pine (Pinus contorta) on an “average site” in Alberta (adapted from Johnstone 1976). Relevant mortality refers to trees greater than 11.8 m (39 ft) in height.
| Age | Trees/ac | Trees/ha | Dominant height (ft) | Dominant height (m) | Relevant mortality |
|---|---|---|---|---|---|
| 20 | 1,793 | 4,431 | 26 | 8 | 0 |
| 25 | 1,780 | 4,398 | 29 | 9 | 0 |
| 30 | 1,603 | 3,961 | 34 | 10 | 0 |
| 35 | 1,403 | 3,467 | 39 | 12 | 494 |
| 40 | 1,215 | 3,002 | 44 | 13 | 959 |
| 45 | 1,047 | 2,587 | 49 | 15 | 1,374 |
| 50 | 902 | 2,229 | 53 | 16 | 1,732 |
| 55 | 777 | 1,920 | 57 | 17 | 2,041 |
| 60 | 670 | 1,656 | 61 | 19 | 2,305 |
| 65 | 578 | 1,428 | 64 | 20 | 2,533 |
| 70 | 500 | 1,236 | 67 | 20 | 2,726 |
| 75 | 434 | 1,072 | 69 | 21 | 2,889 |
| 80 | 378 | 934 | 72 | 22 | 3,027 |
| 85 | 331 | 818 | 74 | 23 | 3,143 |
| 90 | 292 | 722 | 76 | 23 | 3,240 |
| 95 | 261 | 645 | 78 | 24 | 3,316 |
| 100 | 235 | 581 | 79 | 24 | 3,380 |