| Score and class | Definition | Remark |
|---|---|---|
| Class 1.1: Absent | Fructification is absent or inconsiderable | Even reasonably lengthy observation of the crown with binoculars yields no signs of fruiting |
| Class 1.2: Scarce | Sporadic occurrence of fruiting | Not noticeable at first sight. It must be looked for on purpose with binoculars. |
| Class 2: Common | Fructification is such that it can be observed with the naked eye | The appearance of the tree is influenced but not dominated by fructification |
| Class 3: Abundant | Fructification is obvious and immediately meets the eye | Fruiting determines the tree's appearance |
| Source: International Co-operative Programme on Assessment and Monitoring of Air Pollution Effects on Forests (ICP Forests, 2010) | ||
| Download an Excel workbook containing tree assessment tables found in the stormwater manual. | ||