Table 1 Summary of the data used to develop models of spiral grain angle
From: Modelling spiral grain angle variation in New Zealand-grown radiata pine
Region | Number of stands | Age range (yrs) | No. of trees | Diameter at breast height (cm) | Estimated total height (m) |
|---|---|---|---|---|---|
North Island | |||||
Northland | 7 | 11-33 | 261 | 24.0-68.0 | 13.5-44.7 |
Central North Island | 28 | 11-35 | 918 | 22.9-82.0 | 11.2-51.0 |
East Coast/Hawke's Bay | 5 | 17-26 | 161 | 22.5-75.5 | 33.8-47.5 |
Southern North Island | 2 | 25 | 16 | 31.5-66.2 | 31.2-45.0 |
South Island | |||||
Nelson | 7 | 25-33 | 114 | 22.7-70.5 | 30.9-51.1 |
Canterbury | 3 | 25 | 30 | 28.8-60.5 | 24.7-36.0 |
Otago/Southland | 5 | 25-26 | 35 | 35.3-66.8 | 23.3-39.9 |
Overall | 57 | 11-35 | 1535 | 22.5-82.0 | 11.2-51.1 |