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Creator:: Mainwaring, Douglas B. and Maguire, Douglas A. (Douglas Alan)
Abstract:: Basal area and height growth were analyzed for individual trees in uneven-aged ponderosa pine (Pinus ponderosa Dougl. ex Laws.) and lodgepole pine (Pinus contorta Dougl. ex. Loud.) stands in central Oregon. Basal area growth was modeled as a function of other stand and tree variables to address three general objectives:...
Resource Type:: Article
Full Text:: B. Mainwaring and Douglas A. Maguire Abstract: Basal area and height growth were analyzed for

Creator:: Adams, W. T., Hipkins, Valerie D., Burczyk, J., and Randall, W. K.
Abstract:: Pollen contamination was investigated in one block (block 4) of a 10-block Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) seed orchard complex in western Oregon. Blocks (25 clones each) represent different breeding zones; thus, contaminant pollen sources not only included the adjacent natural stand of Douglas-fir, but also other blocks within the...
Resource Type:: Article
Full Text:: Pollen contamination trends in a maturing Douglas-fir seed orchard1

Creator:: Hann, David W.
Abstract:: In their recent Canadian Journal of Forest Research Comment 368 article, Wilson and Oliver (2000) developed an equation for predicting the average ratio of height to diameter at breast height for the largest 250 trees/ha (H/DL250) in unthinned stands as a function of initial density and dominant height of the...
Resource Type:: Article
Full Text:: ) The starting tree lists represented plantations with a to- tal age of 10 years and a Douglas-fir

Creator:: Maguire, Douglas A., Mainwaring, Douglas B., and Kanaskie, Alan
Abstract:: Swiss needle cast, a foliar disease caused by the Ascomycete Phaeocryptopus gaeumannii (T. Rohde) Petr., continues to afflict Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) in north coastal Oregon. Permanent plots were installed in 1998 to assess growth impacts and monitor disease severity. Gross periodic annual increment was measured for three 2-year...
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Full Text:: mortality in young Douglas-fir stands experiencing a 3 range in Swiss needle cast severity 4 5 6

Creator:: Bravo, Felipe, Hann, David W., and Maguire, Douglas A. (Douglas Alan)
Abstract:: Mixed conifer and hardwood stands in southwestern Oregon were studied to explore the hypothesis that competition effects on individual-tree growth and survival will differ according to the species comprising the competition measure. Likewise, it was hypothesized that competition measures should extrapolate best if crown-based surrogates are given preference over diameter-based...
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Full Text:: . Hann, and Douglas A. Maguire Abstract: Mixed conifer and hardwood stands in southwestern Oregon were

Creator:: Swanston, Christopher W. and Myrold, David Douglas
Abstract:: Nitrogen incorporation from red alder (Alnus rubra Bong.) into an Oregon upland mesic forest soil was studied by tracing the fate of 15N added as 15N-labeled alder leaf litter. The recovery of 15N in vegetation, litter, light- and heavy-fractions of the soil, the chloroform-labile (microbial biomass) pool, and the whole...
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Full Text:: soil nitrogen beneath a plantation of red alder and Douglas-fir. Soil Sci. Soc. Am. Proc.27: 231–234

Creator:: Adams, W. T., Hipkins, Valerie D., Burczyk, J., and Randall, W. K.
Abstract:: Pollen contamination was investigated in one block (block 4) of a 10-block Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) seed orchard complex in western Oregon. Blocks (25 clones each) represent different breeding zones; thus, contaminant pollen sources not only included the adjacent natural stand of Douglas-fir, but also other blocks within the...
Resource Type:: Article
Full Text:: Pollen contamination trends in a maturing Douglas-fir seed orchard1

Creator:: Anekonda, T. S., Lomas, M. Christine, Adams, W. T., Kavanagh, Kathleen L., 1955-, and Aitken, S. N.
Abstract:: Abstract: Genetic variation in drought hardiness traits and their genetic correlations with growth potential and17re1c6overy traits were investigated in 39 full-sib families of coastal Douglas-fir (Pseudotsuga menziesii var. menziesii (Mirb.) Franco) from southwestern British Columbia. Seedlings of these families were grown in raised nursery beds and subjected to three moisture...
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Full Text:: Genetic variation in drought hardiness of coastal Douglas-fir

Creator:: Maguire, Douglas A., Johnston, Stuart R., and Cahill, James M.
Abstract:: The quality of lumber and veneer recovered from logs of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) is directly influenced by the maximum limb size attained on the crop tree. Because limb sizes are influenced by standdensity regimes, a need has arisen for quantitative tools that link a wide array of silvicultural...
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Full Text:: -level descriptors Douglas A. Maguire, Stuart R. Johnston, and James Cahill Abstract: The quality of

Creator:: Zhang, Jianwei, Ritchie, Martin W., Maguire, Douglas A., and Oliver, William W.
Abstract:: We analyzed 45 years of data collected from three ponderosa pine (Pinus ponderosa Douglas ex P. Lawson & C. Lawson) levels-of-growing-stock installations in Oregon (OR) and northern California (CA), USA, to determine the effect of stand density regimes on stand productivity and mortality. We found that periodic annual increment (PAI)...
Resource Type:: Article
Full Text:: reduces mortality while maintaining stand productivity Jianwei Zhang, Martin W. Ritchie, Douglas A

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