Douglas Fir
Using Bigcone Douglas-Fir Fire Scars and Tree Rings to Reconstruct Interior Chaparral Fire History
... We hypothesize that the increased scarring rate may reflect increasing severity of fires in the late nineteenth and twentieth centuries rel- ative to earlier periods of our record. Changes in fire severity within stands ...
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Analysis of herbicide effects on Douglas fir (Pseudotsuga menziesii [Mirb ] Franco) natural regeneration
... AbsTrAcT: Douglas fir (Pseudotsuga menziesii ...where Douglas fir grows in mixture with our domestic tree species, is one of the oldest and most productive stands at the Training Forest ...
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Comparison of sugar content for ionic liquid pretreated Douglas-fir woodchips and forestry residues
... Compositional analysis of untreated forestry residue samples yielded 35.4% glucan, 10.1% mannan, 2.5% xylan, 3.5% galactan, 0.5% arabinan, 26.8% lignin and < 1% ash. Lower amounts of major polymeric sugars (glucan and ...
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Influence of forest age on forms of carbon in Douglas-fir soils in the Oregon Coast Range
... Abstract: The amount and type of carbon (C) in a forest soil reflects the past balance between C accumulation and loss. In an old-growth forest soil, C is thought to be in dynamic equilibrium between accumulations and ...
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Spatial variability of throughfall water and chemistry and forest floor water content in a Douglas fir forest stand
... In this study, throughfall water and chemistry and forest floor water content data for a Douglas fir forest subject to high levels of atmospheric N deposition, were analysed for small-scale, within-plot, ...
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Root system development in Douglas fir (Pseudotsuga menziesii [Mirb ] Franco) on fertile sites
... of Douglas fir aged 10, 20, 30, 60 and 80 years on aerated soils (Cambisols) without ...the Douglas fir develops a uniform root system of substitute taproots and anchors, which has great ...
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Economic Impact of Douglas fir (Pseudotsuga menziesii [Mirb ] Franco) production in the Czech Republic
... instance, Douglas-fir is grown on more than 300 thousands ha and its share is going to increase gradually to 5% of the forest land, since in western European markets it is priced higher than Nor- way spruce ...
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Investigation of Douglas fir provenance test in North Western Bulgaria at the age of 24 years
... ABSTRACT: A comparative analysis of growth rate and health condition of 54 Douglas-fir (Pseudotsuga menziesii [Mirb.] Franco) provenances was conducted at the age of 24 years. The provenance test was ...
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Production potential of Douglas fir at mesotrophic sites of Křtiny Training Forest Enterprise
... entitled Douglas fir – the most important introduced species in multifunctional and sustainable forest ...Křtiny. Douglas fir has been grown there since the 80s of the 19 th ...
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Phytophthora pluvialis, a new species from mixed tanoak-Douglas-fir forests of western Oregon, U.S.A.
... Abstract: A new species, Phytophthora pluvialis is described. P. pluvialis has been recovered from streams, soil and canopy drip in the mixed tanoak-Douglas-fir forest in Curry County, Oregon, and in two ...
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Estimating upper stem diameters and volume of Douglas-fir and Western hemlock trees in the Pacific northwest
... Rojo et al. (2005) evaluated 31 different taper functions that belonged to three model groups – simple, segmented, and variable-form taper functions. These models differ in how they describe stem profile as well as their ...
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Germination and emergence response of specific Douglas fir seed lot to different temperatures and prechilling duration
... Such a long pre-sowing treatment is not usual in the nursery practice. A survey published by Seif- ert (2005) indicates that the pre-sowing treat- ment normally lasts between 2 and 12 weeks. The norm ISTA (International ...
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Production potential of Douglas fir in acid sites of Hůrky Training Forest District, Secondary Forestry School in Písek
... Comparing 10 Douglas fir trees with 10 Norway spruce, Scots pine or European larch trees of the largest volume, higher and generally markedly higher production potential of the introduce[r] ...
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Effects of Douglas fir (Pseudotsuga menziesii [Mirb ] Franco) on understorey layer species diversity in managed forests
... the Douglas-fir and parallel Norway spruce, European Beech and oak-dominated stands to find influences of this intro- duced tree species on the understorey layer in totally 12 localities in the whole Czech ...
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Mapping of Quantitative Trait Loci Controlling Adaptive Traits in Coastal Douglas Fir. III. Quantitative Trait Loci-by-Environment Interactions
... growth and development in Populus. IV. Mapping QTLs with Kaya, Z., R. K. Campbell and W. T. Adams, 1989 Correlated re- large effects on growth, form and phenology traits in a forest sponses of height increment and ...
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Root system development in naturally regenerated Douglas-fir saplings as influenced by canopy closure and crowding
... planted Douglas-fir trees to storm risk in Germany ap- pears to be equivalent to that of Norway spruce (Picea abies ...of Douglas-fir to wind damage is partially attributable to grow- ing ...
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Douglas-fir beetle lipid levels in relation to tree physical characteristics
... of Douglas-fir beetle, Dendroctonus pseudotsugae Hopkins, brood adult lipid levels and position of development along infested tree boles was ...suggest Douglas-fir beetle does not benefit, in ...
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Douglas-fir ( Pseudotsuga menziesii(Mirb.) Franco) and its role in the Czech forests
... the Douglas-fir on the state of humus forms in terms of soil chemistry was also documented on the afforested agricultural land (Podrázský et ...of Douglas-fir, Norway spruce, Scots pine, and ...
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Does prolonged stratification of Douglas fir influence the yield of seedlings?
... filled seeds emerge during the growing season, the emergence rate is lower than that of seeds with ex- tended stratification period. With the objective of sowings at the forest nursery being to achieve the maximum ...
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Historical fires in Douglas-fir dominated riparian forests of the southern Cascades, Oregon
... coast Douglas-fir, which typically heals over fire scars when fire return intervals are sufficiently long, making them difficult or impossible to detect in a live tree (Taylor and Skinner ...
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