Table 1 Characteristics of the two types of plot data used in modelling
Plot type | Variable-radius plot | Square plot | |
|---|---|---|---|
Investigation year | 1989-1990, 2004-2005, 2014-2015 | 2014-2015 | |
Sample size | 215 | 22 | |
Stand age (year) | Min. | 15 | 25 |
Mean | 46 | 45 | |
Max. | 87 | 73 | |
Stand height (m) | Min. | 5.0 | 8.6 |
Mean | 13.4 | 12.5 | |
Max. | 25.0 | 20.4 | |
Mean diameter (cm) | Min. | 8.0 | 12.9 |
Mean | 22.0 | 17.4 | |
Max. | 44.0 | 24.8 | |
Number of trees per hectare | Min. | 151 | 600 |
Mean | 628 | 1595 | |
Max. | 2355 | 3123 | |