Table 1 Summary statistics of the continuous variables used in the development of the longitudinal height-diameter models. Statistics for quadratic mean diameter (species specific) and stand age were calculated for sample plot/measurement occasion means, statistics for altitude for sample plot means respectively
Minimum | 25%-quantile | Median | Mean | 75%-quantile | Maximum | |
|---|---|---|---|---|---|---|
Norway spruce | ||||||
dbh (cm) | 5.0 | 11.8 | 18.1 | 19.4 | 25.5 | 75.5 |
Tree height h (m) | 1.5 | 8.6 | 13.0 | 13.3 | 17.4 | 35.2 |
Basal area larger BAL (m2 per 250 m2) | 0.0 | 0.086 | 0.215 | 0.281 | 0.410 | 2.255 |
Quadratic mean diameter qmD (cm) | 5.0 | 11.7 | 15.4 | 16.4 | 20.0 | 64.3 |
Stand age (Y) | 2 | 41 | 75 | 79 | 115 | 359 |
Altitude Alt (m) | 2.0 | 205 | 355.0 | 394.1 | 555.0 | 1065.0 |
Scots pine | ||||||
dbh (cm) | 5.0 | 15.0 | 22.2 | 22.9 | 29.8 | 83.1 |
Tree height h (m) | 1.6 | 8.5 | 12.5 | 12.5 | 16.0 | 35.0 |
Basal area larger BAL (m2 per 250 m2) | 0.0 | 0.049 | 0.149 | 0.197 | 0.293 | 1.468 |
Quadratic mean diameter qmD (cm) | 5.0 | 16.6 | 22.2 | 23.0 | 28.2 | 78.4 |
Stand age (Y) | 1 | 55 | 98 | 92 | 125 | 359 |
Altitude Alt (m) | 0.0 | 175.0 | 300.0 | 350.8 | 500.0 | 985.0 |
Silver birch | ||||||
dbh (cm) | 5.0 | 7.6 | 10.8 | 12.3 | 15.3 | 80.0 |
Tree height h (m) | 1.9 | 5.8 | 7.7 | 8.4 | 10.3 | 30.8 |
Basal area larger BAL (m2 per 250 m2) | 0.1 | 0.051 | 0.130 | 0.180 | 0.257 | 1.704 |
Quadratic mean diameter qmD (cm) | 5.0 | 8.5 | 10.5 | 11.8 | 13.6 | 64.5 |
Stand age (Y) | 1 | 48 | 75 | 78 | 105 | 359 |
Altitude Alt (m) | 0.0 | 180.0 | 340.0 | 407.6 | 615.0 | 1130.0 |