Growth, chlorophyll and pest activity measurements for the Dublin blue spruce trees with and without root crown excavation.
| Growthz/chlorophyll/pest activity measurementy | Treatment | |
|---|---|---|
| Excavation Mean (SD) | No excavation Mean (SD) | |
| 2005 trunk diameter (cm) | 1.0 (0.7) | 1.0 (0.6) |
| 2006 trunk diameter (cm) | 0.1 (0.1) | 0.1 (0.2) |
| 2007 trunk diameter (cm) | 0.5 (0.4) | 0.6 (0.6) |
| 2005 tree height (cm) | 35.0 (11.1) | 35.0 (26.6) |
| 2006 tree height (cm) | 18.3 (15.3) | 27.2 (22.4) |
| 2007 tree height (cm) | 25.9 (17.9) | 20.8 (17.7) |
| 2005 canopy width (cm) | 27.4 (19.5) | 19.8 (17.9) |
| 2006 canopy width (cm) | 9.1 (17.4) | 13.7 (18.4) |
| 2007 canopy width (cm) | 18.3 (18.2) | 15.2 (18.5) |
| 2004 twig extension (cm) | 9.5 (2.7) | 8.6 (3.2) |
| 2005 twig extension (cm) | 9.2 (2.2) | 9.4 (3.2) |
| 2006 twig extension (cm) | 8.9 (2.6) | 9.0 (3.4) |
| 2007 chlorophyll | 1.3 (0.4) | 1.2 (0.4) |
| 2004 mite injury (%) | 16.0 (17.5) | 24.2 (20.9) |
| 2006 bagworm (no.) | 18.6 (35.9) | 4.4 (7.5) |