Index Catalog // ScholarsArchive@OSU

Computer simulation of Douglas-fir tree and stand growth

Creator:: Arney, James Douglas, 1941-
Abstract:: A mathematical model has been developed to describe the growth of individual Douglas-fir trees under a variety of stand conditions and management schedules. The model was developed using empirical data from open-grown trees and reducing growth capacities of height, stem, and crown as functions of intertree competition indices. Any initial...
Resource Type:: Dissertation

Management impacts on the ectomycorrhizal associations of Pseudotsuga menziesii var. menziesii seedlings : field and greenhouse bioassays

Creator:: Pilz, David P.
Abstract:: Field and greenhouse bioassays were used to compare the mycorrhizal associations of Douglas-fir seedlings from undisturbed forests, and nonburned and burned portions of clearcuts on three Sites in the west-central Cascades of Oregon. Field soil transfers and greenhouse soil pasteurization and reinoculation were used to investigate soil biology and inoculum...
Resource Type:: Masters Thesis

Image pre-processing algorithms for isolation of defects in Douglas-fir veneer

Creator:: Forrer, Johannes Barry
Abstract:: The goal of this research is to develop automatic techniques for identifying defects in Douglas-fir veneer. To achieve this goal, computer vision techniques, in particular image-processing, will be applied. Several pre-processing steps may be required to enhance images in making further analysis easier, faster, and more reliable. Pre-processing is often...
Resource Type:: Masters Thesis

Vegetation-environmental relationships on two clearcuts on the western slopes of the Oregon Cascades

Creator:: Egeland, Dawn M.
Abstract:: Douglas-fir and western hemlock growth and stocking were examined on two neighboring clear-cut watersheds in the Western Cascades of Oregon and related to the intensity of burning and logging disturbance, habitat type, soil type, aspect and the influence of percent cover of both invading Ceanothus species and residual Acer circinatum....
Resource Type:: Masters Thesis

Comparative development of a thinned and a natural Douglas-fir stand from 45 to 60 years of age

Creator:: Groman, William A.
Abstract:: An understanding of the dynamics of individual tree and stand growth, development, and structural patterns during the immature formative years of a commercial species is essential to determine correct thinning practices necessary to attain desired objectives. This study compared a natural, medium-site Douglas-fir stand and an adjacent similar stand released...
Resource Type:: Dissertation

Stability and density management in Douglas-fir plantations

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:: large as 960 for some trees, and a constant crown ratio of 0.8 for all trees on a plot and across all

Indole-3-acetic acid in Douglas-fir (Pseudotsuga menziesii (mirb.) Franco) : a definitive analysis of gas-liquid chromatography-mass spectrometry

Creator:: DeYoe, David R.
Abstract:: Definitive evidence for the occurrence and seasonal variation of indole-3 -acetic acid (IAA) in shoots 0 DougLas-fir (Pseudotsuga rrienztesii (Mirb. ) Franco) was sought. Collections obtained in December and June were extracted by solvent using methanol arid diethyl ether arid by certtrtfugatiori. Extraction by ceritrifugation appeared to be twice as...
Resource Type:: Masters Thesis

Specific gravity and per cent summerwood variation in a young Douglas-fir clone and use of uniformity trial in predicting specific gravity from increment cores

Creator:: Strause, David Allen
Resource Type:: Masters Thesis

Influences of shoot origin and certain pre- and post-severance treatments on the rooting and growth characteristics of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) stem cuttings

Creator:: Black, Darvil Kim
Resource Type:: Dissertation
Full Text:: CUTTINGS Abstract approved: W L/' r I V-.y w — w^j-<- A. N. Roberts Stem cuttings of

Starch content and crown growth in two Douglas-fir stands

Creator:: Kilpatrick, Kran James
Abstract:: The objectives of this investigation were to measure the seasonal and diurnal variations of starch as well as to relate these variations to growth of the trees. This study also microscopically examined the needles to determine if starch exists in granular form in Douglas-fir. The objectives were designed to gain...
Resource Type:: Masters Thesis
Full Text:: mean data for upper, mid and lower crown A two piece overlay with one sheet for each plot, upper and

ScholarsArchive@OSU

Computer simulation of Douglas-fir tree and stand growth

Management impacts on the ectomycorrhizal associations of Pseudotsuga menziesii var. menziesii seedlings : field and greenhouse bioassays

Image pre-processing algorithms for isolation of defects in Douglas-fir veneer

Vegetation-environmental relationships on two clearcuts on the western slopes of the Oregon Cascades

Comparative development of a thinned and a natural Douglas-fir stand from 45 to 60 years of age

Stability and density management in Douglas-fir plantations

Indole-3-acetic acid in Douglas-fir (Pseudotsuga menziesii (mirb.) Franco) : a definitive analysis of gas-liquid chromatography-mass spectrometry

Specific gravity and per cent summerwood variation in a young Douglas-fir clone and use of uniformity trial in predicting specific gravity from increment cores

Influences of shoot origin and certain pre- and post-severance treatments on the rooting and growth characteristics of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) stem cuttings

Starch content and crown growth in two Douglas-fir stands

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