Jump to Main Content
Growth intercept models for species without distinct annual branch whorls: western hemlock
- Nigh, G.D.
- Canadian journal of forest research = 1996 v.26 no.8 pp. 1407-1415
- Tsuga heterophylla, growth models
- A growth intercept model is presented that is designed to estimate site index for juvenile stands of species without distinct annual branch whorls. It is called a variable growth intercept model and is demonstrated on western hemlock (Tsuga heterophylla (Raf.) Sarg.). The growth intercept is calculated from all the growth above breast height (hence the name variable), not just a fixed number of years' growth above breast height as is traditionally done. This technique gives more flexibility in using growth intercepts to estimate site index. It can also lead to more accurate estimates of site index because it incorporates more growth information.