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Filtering by: Advisor Bell, John F. Commencement Year 1981

Site index equations for mountain hemlock on three habitat types in the Central Oregon Cascades

Creator:

Johnson, Gregory P.

Abstract:

Site index and height growth equations for mountain hemlock (Tsuga mertensiana (Bong.) Carr.) were developed from 37 trees located in the Deschutes Nationa1 Forest. Initial analysis indicated the need for stratification by habitat type. Preliminary community classifications were used to develop three strata for the study. Two approaches to model...

Resource Type:

Masters Thesis
An evaluation of the use of tarif tables in second growth Douglas-fir

Creator:

Marshall, David D.

Abstract:

The Washington State Department of Natural Resources' Comprehensive Tree-Volume Tarif Tables are a set of preconstructed local volume tables. This can increase "on plot" efficiency since only diameters are necessary to obtain volumes after the proper table for the given diameter/height relationship is accessed. The tables are accessed and indexed...

Resource Type:

Masters Thesis
Predicting basal area growth in young-growth Douglas-fir using crown competition factor

Creator:

Schaer, Charles W.

Abstract:

A comparison between crown competition factor and basal area as to their ability to predict future basal area growth was conducted. It was shown that for a single age and site combination there was no real difference between the growth prediction ability of the two measures of stand density. It...

Resource Type:

Masters Thesis
A comparative study of three log rules commonly used in the Pacific Northwest, U.S.A.

Creator:

Paixao, Julio De Castro

Abstract:

A comparative study was done on data collected by Weyerhaeuser Company on l,6144 second-growth Douglas-fir, Pseudotsuga menziesii, trees. The variable used in the study was the percent difference, positive or negative, between the volumes given by each of three different log rules and the standard tree volumes determined by Weyerhaeuser...

Resource Type:

Masters Thesis