Table 3 Stand attributes, site characteristics, and wood density in Douglas-fir stands used to develop sub-model 3
From: Predicting wood density of growth increments of Douglas-fir stands in New Zealand
Attribute | Units | Gowan Hill 10 years | Kaingaroa 21 years | Forest Creek 9 years | Forest Creek 19 years | Kaingaroa 28 years | Whakarewarewa 31 years |
|---|---|---|---|---|---|---|---|
Year planted | 1998 | 1985 | 2000 | 1990 | 1982 | 1979 | |
Initial stocking | Stems/ha | 1600 | 1450 | 1419 | 1372 | 1666 | 2000 |
Stand age | Years | 10 | 21 | 9 | 19 | 28 | 31 |
Live stocking at assessment age | Stems/ha | 1186 | 1250 | 1419 | 1051 | 800 | 717 |
Basal area | m2/ha | 24.8 | 52.6 | 12.0 | 37.9 | 55.5 | 46.7 |
Mean top height | m | 8.4 | 15.5 | 6.5 | 14.7 | 25.6 | 26.2 |
Average ring age of outerwood | years | 7.5 | 15.5 | 6.5 | 16.5 | 25.5 | 28.5 |
Breast height wood density of outer 5 rings of plot trees (and sample size) | kg/m3 | 336 (20) | 373 (20)* | 388 (36) | 362 (23) | 488 (8) | 462 (35) |
Elevation | m | 254 | 790 | 786 | 737 | 367 | 440 |
Mean annual temperature | °C | 9.8 | 9.4 | 8.0 | 8.2 | 11.9 | 12.0 |
C (0–5 cm soil) | % | 5.6 | 6.9 | 5.3 | 4.0 | 6.3 | 8.0 |
N (0–5 cm soil) | % | 0.41 | 0.32 | 0.37 | 0.23 | 0.33 | 0.42 |
C/(N − 0.014) | 14.1 | 22.3 | 14.9 | 18.1 | 19.9 | 19.6 |