Table 7. Duncan test grouping for environmental variables affecting stand volume per ha.
| Survey order | Stand volume/ha | Significant grouping | Climate zone | Stand volume/ha | Significant grouping | Altitude (m) | Stand volume/ha | Significant grouping |
| 7th | 163.3 | A | NT | 156.1 | A | 201-300m | 166.4 | A |
| 6th | 141.7 | B | CT | 148.9 | A | 101-200m | 138.0 | B |
| 5th | 109.5 | C | ST | 116.1 | B | 301-400m | 120.0 | B |
| - | - | - | WT | 102.9 | B | >100m | 118.0 | B |
(note) NT: northern temperate zone, CT: central temperate zone, ST: southern temperate zone, WT: warm temperate zone.