Index Catalog // ScholarsArchive@OSU

Pathogenicity to Douglas-fir of Ophiostoma pseudotsugae and Leptographium abietinum, fungi associated with the Douglas-fir beetle

Creator:: Ross, Darrell W. and Solheim, Halvor
Abstract:: Pole-size Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) were inoculated with two fungi (Ophiostoma pseudotsugae (Rumb.) von Arx and Leptographium abietinum (Peck) Wingf.) associated with the Douglas-fir beetle (Dendroctonus pseudotsugae Hopkins) to evaluate their pathogenicity. Pruning the lowermost 30% of the live crown had no effect on host tree defenses. Inoculation with...
Resource Type:: Article
Full Text:: Leptographium abietinum, fungi associated with the Douglas-fir beetle Darrell W. Ross and Halvor Solheim

Thinning ponderosa pine (Pinus ponderosa) stands reduces mortality while maintaining stand productivity

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

Douglas-fir soil C and N properties a decade after termination of urea fertilization

Creator:: Homann, Peter S., Caldwell, Bruce A., Chappell, H. N., Sollins, Phillip, and Swanston, Chris W.
Abstract:: Chemical and microbial soil properties were assessed in paired unfertilized and urea fertilized (>89 g N·m–2) plots in 13 second-growth Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) stands distributed throughout western Washington and Oregon. A decade following the termination of fertilization, fertilized plots averaged 28% higher total N in the O layer...
Resource Type:: Article
Full Text:: Chris W. Swanston Abstract: Chemical and microbial soil properties were assessed in paired unfertilized

Evaluation of nonspatial approaches and equation forms used to predict tree crown recession

Creator:: Hann, David W. and Hanus, Mark L.
Abstract:: Two nonspatial approaches for modeling tree crown recession (ΔHCB) were evaluated by using 5341 observations from Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco). The first approach applies a static height-to-crown-base (HCB) equation at the start and end of the growth period and uses the difference in these predictions as an estimate of...
Resource Type:: Article
Full Text:: predict tree crown recession David W. Hann and Mark L. Hanus Abstract: Two nonspatial approaches for

Clonal expansion and seedling recruitment of Oregon grape (Berberis nervosa) in Douglas-fir (Pseudotsuga menziesii) forests: comparisons with salal (Gaultheria shallon)

Creator:: Huffman, David W. (William), 1962- and Tappeiner, John C.
Abstract:: Seedling regeneration and morphology of Oregon grape (Berberis nervosa Pursh) and salal (Gaultheria shallon Pursh) were studied in thinned and unthinned Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) stands in the central Coast Range, Oregon. Above- and below-ground growth of both species were significantly and negatively correlated with stand density. Oregon grape...
Resource Type:: Article
Full Text:: shallon)1 David W. Huffman and John C. Tappeiner II Abstract: Seedling regeneration and morphology of

Spring cold hardiness under strong genetic control in Oregon populations of Pseudotsuga menziesii var. menziesii

Creator:: Aitken, S. N. and Adams, W. T.
Abstract:: Genetic variation in spring cold hardiness of shoots prior to bud break was studied in two Oregon breeding populations of Pseudotsuga menziesii var. menziesii (Mirb.) Franco, one on the west slope of the Cascade Mountains and the other in the Coast Range. In March and April 1993, and April 1994,...
Resource Type:: Article
Full Text:: : improving fibre yield and quality. Edited by B.M. Potts, N.M.G. Borralho, J.B. Reid, R.N. Cromer, W.N

Effects of height imputation strategies on stand volume estimation

Creator:: Garber, Sean M., Temesgen, Hailemariam, Monleon, Vicente J., and Harm, David W.
Abstract:: Subsampling and subsequent imputation of tree heights can improve the predictive performance of stand volume estimation but may also introduce biases. Using coastal Douglas-fir data from southwest Oregon, USA, the predictive performance of several height imputation strategies for estimating stand volume was evaluated. A subsample of 1-15 trees was randomly...
Resource Type:: Article
Full Text:: , Vicente J. Monleon, and David W. Harm Abstract: Subsampling and subsequent imputation of tree heights can

Methods for evaluating crown area profiles of forest stands

Creator:: Dubrasich, Michael E., Hann, David W., and Tappeiner, John C., II
Abstract:: Canopy architectures of five structurally complex forest stands and three structurally simple forest stands in southwest Oregon and the Willamette Valley, Oregon, were evaluated and quantified through crown area profiles. Mixed conifer and mixed conifer-hardwood stands across a range of sites were sampled for crown widths and heights. Crown width...
Resource Type:: Article
Full Text:: . Dubrasich, David W. Hann, and John C. Tappeiner II Abstract: Canopy architectures of five structurally

Impact of competitor species composition on predicting diameter growth and survival rates of Douglas-fir trees in southwestern Oregon

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...
Resource Type:: Article
Full Text:: diameter growth and survival rates of Douglas-fir trees in southwestern Oregon1 Felipe Bravo, David W

Analysis and comparison of nonlinear tree height prediction strategies for Douglas-fir forests

Creator:: Temesgen, H., Monleon, V. J., and Hann, D. W.
Abstract:: Using an extensive Douglas-fir data set from southwest Oregon, we examined the (1) performance and suitability of selected prediction strategies, (2) contribution of relative position and stand-density measures in improving tree height (h) prediction values, and (3) effect of different subsampling designs to fill in missing h values in a...
Resource Type:: Article
Full Text:: (Curtis 1967); by relative position of trees in a stand (Temesgen and von Gadow 2004); and spatial

ScholarsArchive@OSU

Pathogenicity to Douglas-fir of Ophiostoma pseudotsugae and Leptographium abietinum, fungi associated with the Douglas-fir beetle

Thinning ponderosa pine (Pinus ponderosa) stands reduces mortality while maintaining stand productivity

Douglas-fir soil C and N properties a decade after termination of urea fertilization

Evaluation of nonspatial approaches and equation forms used to predict tree crown recession

Clonal expansion and seedling recruitment of Oregon grape (Berberis nervosa) in Douglas-fir (Pseudotsuga menziesii) forests: comparisons with salal (Gaultheria shallon)

Spring cold hardiness under strong genetic control in Oregon populations of Pseudotsuga menziesii var. menziesii

Effects of height imputation strategies on stand volume estimation

Methods for evaluating crown area profiles of forest stands

Impact of competitor species composition on predicting diameter growth and survival rates of Douglas-fir trees in southwestern Oregon

Analysis and comparison of nonlinear tree height prediction strategies for Douglas-fir forests

Limit your search

Academic Affiliation

Creator

Date

Decade

Language

Peer Reviewed

Resource Type

Rights Statement

Search Constraints

Search Results

Limit your search