Table 8 Comparison of total volume, bias and SEE for the proposed models, Spurr’s volume equation, and existing total stem volume table estimates based on the validation data set
From: Compatible volume and taper models for economically important tree species of Turkey
Species | Bias (m3) | SEE (m3) |
|---|---|---|
Brutian pine | ||
Clark et al. model | −0.0051 | 0.0787 |
Existing volume table | −0.0436 | 0.1380 |
Spurr model | −0.0046 | 0.1062 |
Lebanon cedar | ||
Clark et al. model | 0.0088 | 0.0282 |
Existing volume table | −0.0377 | 0.0691 |
Spurr model | −0.0021 | 0.0427 |
Cilicica fir | ||
Clark et al. model | 0.0112 | 0.0318 |
Existing volume table | −0.1191 | 0.2380 |
Spurr model | −0.0008 | 0.0703 |
Scots pine | ||
Clark et al. Model | 0.0021 | 0.0268 |
Existing Volume Table | −0.0101 | 0.0461 |
Spurr Model | −0.0014 | 0.0368 |
Black pine | ||
Clark et al. model | −0.0061 | 0.0509 |
Existing volume table | −0.0668 | 0.1279 |
Spurr model | −0.0001 | 0.1016 |