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Filtering by: Subject Douglas fir -- Thinning Committee Member Brodie, Douglas Decade 1990-1999

Examining bias in estimating the response variable and assessing the effect of using alternative plot designs to measure predictor variables in diameter growth modeling

Creator:

Zumrawi, Abdel Azim M. A.

Abstract:

Diameter growth of Douglas-fir (Pseudotsuqa menziesii (Mirb.) Franco) estimated from increment cores was compared with that obtained from repeated measurements of tree diameter on permanent plots located in two Douglas-fir study areas in the central Coast Range of Oregon. Growth was measured for a 6-year period (1979- 1985). Diameter growth...

Resource Type:

Dissertation
Comparative test methods for evaluating shear strength of structural lumber

Creator:

Riyanto, Djoko S.

Abstract:

Five different test methods to determine the parallel-to-grain shear strength of Douglas-fir structural lumber were compared. Four methods assessed the shear strength of lumber sections having a full nominal two by four inch cross-section. These were: three-point bending, four-point bending, five-point bending, and torsion. The fifth method was the ASTM...

Resource Type:

Masters Thesis
Chemical brown stain of Douglas-fir wood

Creator:

Arvey, Shuping Wang

Resource Type:

Dissertation

Full Text:

OF DOUGLAS-FIR WOOD Abstract approved: Murray L. Laver The cause and the mechanism of chemical