Table 7 Predicted timber grade percentage per hectare in relation to silviculture
From: Sawn timber grade recovery from a planted coast redwood stand growing in New Zealand
Data Source | Timber volume (m3ha-1) and overall percentage yield by grade | |||||||
|---|---|---|---|---|---|---|---|---|
Clear all heart | Clear common | Heart B | B common | Construction heart | Construction common | Merchantable heart | Merchantable common | |
Actual pruning | 6.8 | 98.4 | 29.9 | 33.2 | 109.4 | 260.5 | 66.2 | 22.8 |
% | 1 | 16 | 5 | 5 | 17 | 42 | 11 | 4 |
Timely pruning | 7.4 | 102.6 | 29.9 | 30.5 | 109.1 | 258.7 | 66.2 | 22.8 |
% | 1 | 16 | 5 | 5 | 17 | 42 | 11 | 4 |
Brashing | 7.9 | 138.3 | 93.9 | 98.4 | 76.6 | 158.3 | 34.1 | 19.6 |
% | 1 | 22 | 15 | 16 | 12 | 25 | 5 | 3 |