Background of Study Participants, Los Angeles County Arboretum and Botanic Garden, Arcadia, California, U.S., 15 July to 15 August 2014.
| Field of arboriculturez | Experience (years) | Appraisal frequency | |||
|---|---|---|---|---|---|
| Private | 9 | <20 | 4 | Frequent | 3 |
| Municipal | 6 | 20 < × < 31 | 4 | Occasional | 4 |
| Landscape architecture | 1 | >31 | 6 | Rare/Never | 7 |
| Arboretum | 1 | ||||
| Nursery production | 1 | ||||
| Plant health care | 1 | ||||
↵z Of 14 total participants, several declared multiple fields of arboriculture.