Equations for predicting height to crown base for fourteen tree species in southwest Oregon

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dc.creator	Ritchie, Martin W.
dc.creator	Hann, David W.
dc.creator	Oregon State University. Forest Research Laboratory
dc.date.accessioned	2008-03-31T22:44:26Z
dc.date.available	2008-03-31T22:44:26Z
dc.date.issued	1987-03
dc.identifier.uri	http://hdl.handle.net/1957/8246
dc.description	Equations are presented for predicting height to crown base (or bole ratio) for fourteen species of trees common to the mixed-conifer zone of southwest Oregon. Nonlinear regression was used to fit a weighted logistic function for each species. The independent variables include height, crown competition factor in larger trees, stand basal area, site index, and diameter divided by height. Although a number of alternative model forms were considered, the logistic function was found to fit the data best. Validation of the model indicated possible difficulties with ponderosa pine and golden chinkapin, but these problems are probably due to inconsistencies in the validation data rather than shortcomings in the individual models.	en
dc.format.extent	2705480 bytes
dc.format.mimetype	application/pdf
dc.language.iso	en_US	en
dc.publisher	Corvallis, OR : Forest Research Laboratory, College of Forestry, Oregon State University	en
dc.relation.ispartofseries	Research paper (Oregon State University. Forest Research Laboratory)	en
dc.relation.ispartofseries	50	en
dc.subject.lcsh	Forests and forestry -- Oregon, Southwest -- Measurement	en
dc.subject.lcsh	Trees -- Oregon, Southwest -- Growth	en
dc.title	Equations for predicting height to crown base for fourteen tree species in southwest Oregon	en
dc.type	Technical Report	en
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