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Table I
Coast redwood pruning treatments, pruning heights, residual crown lengths, diameters, stand ages, and dates of precommercial thinning by study area and treatment at the time of pruning (winter of 1999–2000). Actual average residual crown lengths show the average of actual crown lengths of control trees or pruned trees after pruning.
| Study areas | Treatment | Mean tree height | Actual average residual | Mean dbh in | Stand age in | PCT date |
|---|---|---|---|---|---|---|
| prescription* | in 1999–2000 (m) | crown length (%) | 1999–2000 (cm) | 1999–2000 (y) | ||
| 299 Cutoff | Control | 9.6 | 71 | 14.2 | 5 | 1999 |
| 60% | 9.4 | 56 | 12.3 | 5 | 1999 | |
| 45% | 10.4 | 46 | 13.9 | 5 | 1999 | |
| 5.5 m or 35% | 9.6 | 47 | 14.2 | 5 | 1999 | |
| 30% | 9.0 | 35 | 12.0 | 5 | 1999 | |
| 15% | 9.7 | 24 | 14.5 | 5 | 1999 | |
| M-line | Control | 7.4 | 80 | 9.9 | 7 | 1999 |
| 60% | 6.0 | 57 | 7.6 | 7 | 1999 | |
| 45% | 7.6 | 42 | 11.3 | 7 | 1999 | |
| 30% | 8.3 | 39 | 11.8 | 7 | 1999 | |
| 15% | 6.8 | 22 | 9.7 | 7 | 1999 | |
| Maple Creek | Control | 9.7 | 78 | 13.2 | 11 | 1998 |
| 4.9–5.5 m | 10.8 | 53 | 17.2 | 11 | 1998 | |
| Fortuna | Control | 12.5 | – | 21.1 | 14 | 1997 |
| 3.0–5.5 m, 40% | 11.9 | 54 | 24.6 | 14 | 1997 | |
| Carlotta | Control | 10.7 | 67 | 14.5 | 8 | 1999 |
| 2.4 m | 10.4 | 65 | 16.0 | 8 | 1999 | |
| 3.0–5.5 m, 40% | 10.2 | 49 | 14.9 | 8 | 1999 | |
| 3.0–5.5 m, 40% | 11.6 | 46 | 18.6 | 8 | 1999 | |
| M-150 | Control | 10.2 | 80 | 13.4 | 7 | 1999 |
| Control | 10.1 | 78 | 12.1 | 7 | 1999 | |
| 2.4 m | 10.4 | 72 | 13.8 | 7 | 1999 | |
| 3.0–5.5 m, 40% | 8.9 | 43 | 12.3 | 7 | 1999 | |
| Mitsui | Control | 7.6 | 81 | 11.2 | 7 | 1999 |
| 2.4 m | 7.2 | 67 | 10.2 | 7 | 1999 | |
| 3.0–5.5 m, 40% | 7.4 | 49 | 13.2 | 7 | 1999 | |