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Enhanced height-growth-rate equations for undamaged and damaged trees in southwest Oregon

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dc.creator Hann, David W.
dc.creator Hanus, Mark L.
dc.creator Oregon State University. Forest Research Laboratory
dc.date.accessioned 2008-02-13T17:16:00Z
dc.date.available 2008-02-13T17:16:00Z
dc.date.issued 2002
dc.identifier.uri http://hdl.handle.net/1957/7878
dc.description Equations for predicting the 5-yr height growth rate of a tree are presented for six conifer species from southwest Oregon. Equations for the combination of undamaged and damaged trees were estimated with weighted nonlinear regression techniques. These equations are being incorporated into the new southwest Oregon version of ORGANON, a model for predicting the development of stands. The equations extend the previous model to older stands and to stands with a heavier component of hardwood tree species. The effects of specific damaging agents on the 5-yr height growth rate were explored for Douglas-fir, the most frequently encountered species, and damage correction factors were estimated. The findings of this analysis indicated that damaging agents can have a significant impact upon 5-yr height growth rate, and as a result, they can lead, over time, to diversification in within-stand structure. Therefore, a full characterization of stand development should include the prediction of the presence and frequency of the various damaging agents affecting trees within the stand and their subsequent impact upon tree attributes such as total height, height to crown base, diameter growth rate, height growth rate, and mortality rate. en
dc.format.extent 699423 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US en
dc.publisher [Corvallis, Or.] : Oregon State University, College of Forestry, Forest Research Laboratory en
dc.relation Explorer Site -- Oregon Explorer en
dc.relation Explorer Site -- Forest Explorer en
dc.relation.ispartofseries Research contribution (Oregon State University. Forest Research Laboratory) en
dc.relation.ispartofseries 41 en
dc.subject.lcsh Forests and forestry -- Oregon -- Measurement en
dc.subject.lcsh Conifers -- Oregon -- Growth -- Mathematical models en
dc.title Enhanced height-growth-rate equations for undamaged and damaged trees in southwest Oregon en
dc.type Technical Report en

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