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FIRE RESISTANCE OF DOUGLAS FIR [Pseudotsuga menziesii (Mirb.) Franco] WOOD TREATED WITH SOME CHEMICALS
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Germination and emergence response of specific Douglas fir seed lot to different temperatures and prechilling duration
Published 2014-07-01“…One of the critical points of Douglas fir seedling production is to optimize the time of sowing and length of pre-sowing treatment. …”
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Automated monitoring of pollen quality in Douglas-fir using digital images: applications for handling and storage
Published 2023-11-01“…Franco Methods: Tetrazolium staining and germination on 10 % Brewback media was used to test Douglas-fir pollen quality. Two macros for automated counting were developed with ImageJ free software using digitized microscopic images, and were tested to evaluate provenances, germination in different media, dehydration/rehydration and freeze-storage treatments, and finally to compare pollen quality between mature trees and GA-induced strobili from juvenile trees. …”
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Evaluating Coastal Douglas Fir Growth Responses to Nitrogen Application Using Tree Ring Chronologies
Published 2023-12-01“…To test the rigor of the RM approach, we collected increment cores of coastal Douglas fir (<i>Pseudotsuga menziesii</i> var. <i>menziesii</i>) at eight sites of an experiment where stands were fertilized in 1971. …”
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Root system development in naturally regenerated Douglas-fir saplings as influenced by canopy closure and crowding
Published 2015-09-01“…Documented information on the growth dynamics and related silvicultural manipulation of naturally regenerated Douglas-fir beneath a canopy shelter is scarce. We hypothesized that long regeneration phases creating dense cohorts of Douglas-fir advanced regeneration beneath a closed canopy of mature trees have a negative impact on the formation of a stable root system. …”
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Discovering Douglas-Fir Woodlands in the Historical Forests of Umatilla National Forest, Eastern Oregon and Washington
Published 2020-10-01“…We discovered unique Douglas-fir open woodlands in the Umatilla National Forest using historical surveys. …”
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Estimating upper stem diameters and volume of Douglas-fir and Western hemlock trees in the Pacific northwest
Published 2018-03-01“…The RMSE obtained from taper-based volume estimates were also comparable with the RMSE of the FIA-PNW volume equations for Douglas-fir and western hemlock trees respectively. …”
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Fire-catalyzed vegetation shifts in ponderosa pine and Douglas-fir forests of the western United States
Published 2020-01-01Subjects: “…Douglas-fir…”
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Diversification of increment reactions of Douglas fir (Pseudotsuga menziesii Franco) from mountainous regions of southern Poland
Published 2003-12-01Subjects: “…douglas fir…”
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Species diversity of forest floor biota in non‐native Douglas‐fir stands is similar to that of native stands
Published 2023-07-01Subjects: Get full text
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Differences in Growth and Log Quality of Douglas-Fir (<i>Pseudotsuga menziesii</i> (Mirb.) Franco) Provenances
Published 2021-03-01“…Douglas-fir (<i>Pseudotsuga menziesii</i> (Mirb.) Franco) is a non-native conifer from western North America that was introduced into European forests at the end of the 19th century. …”
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Modelling internal tree attributes for breeding applications in Douglas-fir progeny trials using RPAS-ALS
Published 2023-06-01“…Coastal Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) is one of the most commercially important softwood species in North America. …”
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Microsites Influence the Light Response of Young Douglas-Fir (<i>Pseudotsuga menziesii</i> (Mirb.) Franco)
Published 2021-05-01Subjects: “…Douglas-fir…”
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Knotwood and Branchwood Polyphenolic Extractives of Silver Fir, Spruce and Douglas Fir and Their Antioxidant, Antifungal and Antibacterial Properties
Published 2023-09-01“…Silver fir and spruce knotwood extracts presented higher antibacterial activity levels than the Douglas fir knotwood extracts did, while Douglas fir knotwood extracts presented more fungal growth inhibition than the spruce and fir knotwood extracts did. …”
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Characteristics of deadwood and implications for biodiversity in Douglas fir (Pseudotsuga menziesii (Mirb.) Franco) planted forests in Italy
Published 2022-12-01“…The aim of the present study is to define a set of indicators to measure the stand diversity of Douglas fir planted forests with special regard to deadwood attributes related to biodiversity conservation. …”
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Outbreaks of Douglas-Fir Beetle Follow Western Spruce Budworm Defoliation in the Southern Rocky Mountains, USA
Published 2022-02-01“…Here, we asked: Does previous WSB damage increase the likelihood of subsequent DFB outbreak in Douglas-fir (<i>Pseudotsuga menziesii</i>) forests of the Southern Rocky Mountains, USA? …”
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Histochemical and geometric alterations of sapwood in coastal Douglas-fir following mechanical damage during commercial thinning
Published 2011-01-01“…Histochemical and geometric alterations to sapwood in mechanically damaged Douglas-fir (Pseudotsuga menziesii [Mirbel] Franco) trees were quantified 14 years after thinning. …”
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Growth and Adaptive Capacity of Douglas Fir Genetic Resources from Western Romania under Climate Change
Published 2022-05-01“…The results highlight the high resistance and relative resilience to extreme droughts of Douglas fir compared to Norway spruce. However, autumn–winter temperatures play an important role in the adaptation of Douglas fir to site conditions in Romania. …”
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Effects of Douglas-fir (Pseudotsuga menziesii [Mirb.] Franco) on understorey layer species diversity in managed forests
Published 2014-07-01“…Douglas-fir cultivation increases species diversity of the stands, but decreases their abundance. …”
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