Enhanced diameter-growth-rate equations for undamaged and damaged trees in Southwest Oregon by David W. Hann

Cover of: Enhanced diameter-growth-rate equations for undamaged and damaged trees in Southwest Oregon | David W. Hann

Published by Oregon State University, College of Forestry, Forest Research Laboratory in [Corvallis, Or.] .

Written in English

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Subjects:

  • Forests and forestry -- Oregon -- Measurement -- Mathematical models.,
  • Trees -- Oregon -- Growth -- Mathematical models.

About the Edition

Equations for predicting the 5-yr diameter-growth rate of a tree are presented for eight conifer and nine hardwood tree species from southwest Oregon. Equation parameters for undamaged and damaged trees combined were estimated by weighted nonlinear regression. The resulting equation for Douglas-fir [Pseudotsuga menziesii (Mirb.) Franco] explained more than 71% of the variation when validated against an independent data set. These equations are being incorporated into the new edition of ORGANON for southwest Oregon, a model for predicting the development of stands. The equations extend the previous model to older stands and stands with a larger component of hardwood. We explored the effects of specific damaging agents on the 5-yr diameter-growth rates of the five most frequently encountered species and estimated damage correction factors. Damaging agents can impact 5-yr diameter-growth rate significantly and, as a result, can lead over time to diversification in stand structure. Therefore, full characterization of stand development should include prediction of the presence and frequency of the agents damaging trees within the stand and their impact on tree attributes such as total height, height-to-crown-base, diameter-growth rate, height-growth rate, and mortality rate.

Edition Notes

Book details

Statementby David W. Hann, Mark L. Hanus.
SeriesResearch contribution -- 39., Research contribution (Oregon State University. Forest Research Laboratory) -- 39.
ContributionsHanus, Mark L., Oregon State University. Forest Research Laboratory.
The Physical Object
Pagination54 p. ;
Number of Pages54
ID Numbers
Open LibraryOL18210932M

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Get this from a library. Enhanced diameter-growth-rate equations for undamaged and damaged trees in southwest Oregon. [David W Hann; Mark L Hanus; Oregon State University.

Forest Research Laboratory.] -- Equations for predicting the 5-yr diameter-growth rate of a tree are presented for eight conifer and nine hardwood tree species from southwest Oregon. David W. Hann. Oregon State Enhanced height-growth-rate equations for undamaged and damaged trees in southwest Oregon.

Full-text available. Dec. Request PDF | Survival, and Growth Response of Douglas-Fir Trees to Increasing Levels of Bole, Root, and Crown Damage | We applied a range of bole.

When the resulting predictive function is plotted against DBH, the resulting function is a skewed unimodal shape with a maximum between 20 and 30 cm ().Additionally, the intercept term, β 0, can be expanded to include other tree and site effects that modify diameter increment while still retaining the basic relationship between tree size and growth (Wykoff,Uzoh,Uzoh Cited by: This banner text can have markup.

web; books; video; audio; software; images; Toggle navigation. This study aims to link three-dimensional coarse root architecture to tree stability in mature timber trees with an average of 1-m rooting depth.

• Undamaged and uprooted trees were sampled in a stand damaged by a storm. Root architecture was measured by three-dimensional (3. Hardwoods of the Pacific Northwest - Free download as PDF File .pdf), Text File .txt) or read online for free.

The history of hardwoods in the Pacific Northwest is sometimes characterized by contradictions. Hardwoods have always been valued as useful trees: they have been a raw material resource for homes, furniture,and implements; a source of food for people and game.

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The tallest tree recorded is 20 m with a diameter of 50 cm. Older or damaged trees freely coppice from the base as do some savanna dipterocarps in Asian seasonal regions.

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The Forest Research Laboratory at Oregon State University is Oregon’s legislatively established and supported center for forestry-related research. Ecological Forest Management Handbook Applied Ecology and Environmental Management A SERIES Series Editor Sven E.

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