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Filtering by: Subject Douglas fir -- Oregon -- Willamette Valley -- Growth -- Mathematical models Resource Type Masters Thesis

Modeling crown profile of Douglas-fir in the Western Willamette Valley

Creator:

Mortzheim, Joseph T.

Abstract:

Crown profile was modeled using a system of equations with three components. The first equation predicts the maximum crown width of an open grown tree based on the tree's diameter at breast height. The second equation modifies maximum crown width to represent the largest width of the crown in stand...

Resource Type:

Masters Thesis
Development of tree height and diameter growth equations for mid-Willamette Valley Douglas-fir

Creator:

Ritchie, Martin W.

Abstract:

Equations for predicting height growth, basal area growth and diameter inside bark are presented for Douglas-fir. Basal area growth equations for grand fir are also presented. The growth models were developed for use in an individual tree/distance independent growth simulator. Various model forms and measures of competitive stress were compared...

Resource Type:

Masters Thesis