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Douglas fir
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1. [Article] The effect of age on transpiration rates of Douglas-fir seedlings (Pseudotsuga menziesii (Mirb.) Franco)
The objective of this study was to determine the effect of age on rates of transpiration by Douglas-fir seedlings. Seeds were collected from a xeric site (Goldendale, Washington) and a mesic site (Forks, ...Citation -
2. [Article] Genetic variation of wood density components in coastal Douglas- fir and their relationships to growth rhythm
Overall wood density is a complex trait resulting from the interaction of three components: average earlywood density, average latewood density, and latewood proportion. In order to better understand the ...Citation -
3. [Article] The effect of preconditioning light intensity on photosynthesis of seedlings of two ecotypes of Douglas-fir
Douglas-fir (Pseudotsuga menziesii (Mirb. ) Franco) seedlings of a high elevation Rocky Mountain source and a low elevation coastal source were pretreated under both high and low intensity artificial light ...Citation -
A study has been made of the kraft pulping properties of young Douglas-fir trees which were thinned from an experimental plantation. The purpose of the plantation study is to determine, whether two year ...
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The dynamics of stands in the mid-elevation old-growth Douglas-fir (Pseudotsuga menziesii) forests of the central western Oregon Cascade Range were investigated using stand structure analysis. Trees with ...
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7. [Article] Effect of thinning and fertilization on wood properties and intra-ring characteristics in young Douglas-fir
The purpose of this study was to determine if thinning, fertilization or a combination of thinning and fertilization had an effect on overall average specific gravity, modulus of elasticity, modulus of ...Citation -
The subject of this study was the determination of the changes in photosynthesis, respiration and transpiration in two ecotypes of Douglas-fir as caused by decreasing soil moisture content. The photosynthetic rate ...
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10. [Article] Weibull diameter distribution models for managed stands of Douglas-fir in Washington and Oregon
The two-parameter Weibull function was used to predict forest stand diameter distributions and growth. Diameter distribution models were developed for even-aged Douglas-fir stands, 20 to 40 years old, ...Citation