Location of failure vs. percentage (of group total) associated with decay (all decay types combined).
| Decay | Q. agrifolia | Hardwoods | Eucalyptus | Conifers | Q. lobata | Other oaks |
|---|---|---|---|---|---|---|
| Trunk (%) | 97 | 65 | 50 | 40 | 71 | 79 |
| Branch (%) | 73 | 33 | 28 | 13 | 62 | 80 |
| Root (%) | 78 | 69 | 51 | 37 | 91 | 96 |
| All locations (%) | 83 | 55 | 39 | 24 | 75 | 86 |