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Comparative rates of CO₂ production from the forest floor in the Douglas-fir ecosystem

Creator:: Phillips, Michael John
Abstract:: To obtain data on the decomposition of the forest floor, a battery operated electrolytic respirometer was developed making it possible to measure CO₂ evolution from field moist forest floor samples in situ independent of root respiration. Banks of four respirometers powered by two 12-volt batteries were installed in three old...
Resource Type:: Masters Thesis
Full Text:: CO2 PRODUCTION FROM THE FOREST FLOOR IN THE DOUGLAS-FIR ECOSYSTEM Redacted for Privacy ChesterA

The physiology of plagiotropic growth of rooted cuttings of Douglas-fir [Pseudotsuga menziesii (Mirb.) Franco]

Creator:: Starbuck, Christopher J.
Abstract:: Experiments were conducted to determine if the plagiotropic growth habit of rooted cuttings of Douglas-fir might result from a system favoring the accumulation of indoleacetic acid in the adaxial side of the shoot in response to vertical placement. Actively growing excised branch terminals were subjected to gravitational disorientation to determine...
Resource Type:: Dissertation
Full Text:: OF PLAGIOTROPIC GROWTH OF ROOTED CUTTINGS OF .DOUGLAS-FIR [PSEUDOTSUGA MENZIESII (MIRB.) FRANCO

Water relations and the root regeneration response of Douglas-fir

Creator:: Cobb, Cheryl Anne
Abstract:: The effect of lifting date and root-pruning treatments on water potential, root regeneration, and shoot growth of six-month-old and three-year-old Douglas-fir seedlings bare-root transplanted into a growth chamber, and sawdust bed, respectively, was studied. Root growth in six-month-old and three-year-old seedlings was highest in February and August respectively. Survival was...
Resource Type:: Masters Thesis
Full Text:: THE ROOT REGENERATION RESPONSE OF DOUGLAS-FIR Abstract approved^ Leslie H. Fuchigami The

Root initiation and elongation in Douglas-fir, Pseudotsuga menziesii (Mirb.) franco, stem cuttings as related to bud and cambial activity

Creator:: Bhella, Harbans Singh
Abstract:: The relation of bud and cambial activity to root initiation and elongation in Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) stem cuttings was studied through two successive growth cycles. Stem cuttings of current season's growth were taken periodically from field-grown Douglas-fir trees to determine: (1) origin and development of root initials; and...
Resource Type:: Dissertation
Full Text:: , 1973 (Major) (Date) Title: ROOT INITIATION AND ELONGATION IN DOUGLAS-FIR, PSEUDOTSUGA

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:: ROOTING AND GROWTH CHARACTERISTICS OF DOUGLAS-FIR (PSEUDOTSUGA MENZIESII (MIRB. ) FRANCO) STEM

Anatomical and chemical characteristics of the Douglas-fir (Pseudotsuga menziesii (mirb.) Franko) phellem cell

Creator:: Litvay, John Dennis
Abstract:: The objectives of this study were to 1) characterize the layering in the wall of the Douglas-fir (Pseudotsuga. menziesii (Mirb. ) Franco) phellem cell, 2) determine the pitting present in this cell wall and 3) determine what compounds are present in the middle lamella of this cell. To accomplish the...
Resource Type:: Dissertation

Douglas-fir bark : water-soluble carbohydrates and alkaline degradation of a xylan

Creator:: Zerrudo, Jose Velmonte
Resource Type:: Dissertation

The influence of seed source origin and phenological characteristics on wood quality in a young Douglas-Fir Provenance Plantation

Creator:: Robinson, Walter P.
Abstract:: The relationships of several wood quality traits with seed origin and phenological characteristics, measured at a young age, were tested from six seed sources in a young Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) provenance plantation. The wood quality traits measured were wood density, uniformity of wood density, percentage latewood, fiber length,...
Resource Type:: Masters Thesis

Effect of seedling characteristics on Kraft pulping properties of young Douglas-fir

Creator:: Chia, Shun Nan
Abstract:: A study has been made of the kraft pulping properties of young Douglas-fir trees which were thinned from an experimental plantation. The purpose of the plantation study is to determine, whether two year old seedlings can be selected on the criteria of height and branch count for future desirable tree...
Resource Type:: Masters Thesis

Diurnal and seasonal changes in xylem water potential, stomatal conductance and abscisic acid in five different habitat types of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco)

Creator:: Murphy, Ellyn Margaret
Abstract:: Sapling Douglas-fir trees on five sites in the Coastal and Cascade Mountain ranges of Oregon were measured five times during the year from the summer of 1977 through the spring of 1978 for diurnal patterns of xylem water potential, stomatal conductance and abscisic acid. Vapor pressure deficit and solar radiation...
Resource Type:: Masters Thesis

First year survival and growth of planting stock of various size on adverse sites

Creator:: Chetock, Jerome J.
Abstract:: First year survival of Douglas-fir seedlings outplanted in areas characterized by intense vegetative competition is heavily dependent on available soil moisture. To test this hypothesis, five distinct classes of Douglas-fir planting stock were planted on the south slope of McCulloch Peak in McDonald Forest in February of 1975. The stocking...
Resource Type:: Masters Thesis

The effect of preconditioning light intensity on photosynthesis of seedlings of two ecotypes of Douglas-fir

Creator:: Hellinga, Gerald Alan
Abstract:: Douglas-fir (Pseudotsuga menziesii (Mirb. ) Franco) seedlings of a high elevation Rocky Mountain source and a low elevation coastal source were pretreated under both high and low intensity artificial light in a growth chamber and outside in a cold frame. Net photosynthesis was then measured at three ages, 6, 10,...
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

Douglas-fir bark : n-hexane-soluble and volatile materials

Creator:: Fang, Henry Hai-loong
Abstract:: Douglas-fir bark was extracted with n-hexane. A light-colored "wax-like" solid was recovered from the extract by evaporation of the solvent. Chemically intact sterol esters and ferulic acid esters were isolated from the "wax" without saponification or degradation as had been necessary in former investigations. The characterization of the intact esters...
Resource Type:: Dissertation

Geographical variation in apparent net photo-synthesis of Rocky Mountain Douglas-fir, Pseudotsuga menziesii var. glauca

Creator:: Pope, Walter William
Abstract:: Rates of apparent net photosynthesis were measured on a sample of Rocky Mountain Douglas-fir consisting of eleven one-year-old seedlings from each of the thirteen different seed sources. Secondary observations of needle length, needle weight, and needle number were also obtained. A formula derived through step-wise multiple regression of the secondary...
Resource Type:: Masters Thesis

Effects of herbaceous weed control on young Douglas-fir moisture stress and growth

Creator:: Preest, David Stanley
Abstract:: Profitable, even-aged forest management depends on the early establishment and rapid growth of each new forest crop. These, in turn, require that the young trees have access to an adequate supply of native resources of moisture, nutrients and light. In Mediterranean-type climates, competition for soil moisture is the most serious...
Resource Type:: Dissertation

Nutrient cycling under 450-year-old Douglas-fir stands

Creator:: Abee, Albert
Abstract:: To investigate the movement of elements (N, P, k, Ca, and Mg) from the tree crowns by natural litterfall and leave wash, plots were established on six 450 year-old growth stands at the H. J. Andrews Experimental Forest. The following are the results of the data analyses. Elemental concentrations contained...
Resource Type:: Masters Thesis
Full Text:: January 4, 1973. Title: IJutrient Cycling Under 450-Year-old Dougl~s-fir Stands. Abstract app roved e

ScholarsArchive@OSU

Comparative rates of CO₂ production from the forest floor in the Douglas-fir ecosystem

The physiology of plagiotropic growth of rooted cuttings of Douglas-fir [Pseudotsuga menziesii (Mirb.) Franco]

Water relations and the root regeneration response of Douglas-fir

Root initiation and elongation in Douglas-fir, Pseudotsuga menziesii (Mirb.) franco, stem cuttings as related to bud and cambial activity

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

Anatomical and chemical characteristics of the Douglas-fir (Pseudotsuga menziesii (mirb.) Franko) phellem cell

Douglas-fir bark : water-soluble carbohydrates and alkaline degradation of a xylan

The influence of seed source origin and phenological characteristics on wood quality in a young Douglas-Fir Provenance Plantation

Effect of seedling characteristics on Kraft pulping properties of young Douglas-fir

Determining moisture content and moisture sorption in Douglas-fir bark

Thermal characteristics of Douglas-fir bark fiber 25⁰ to 250⁰C

Douglas-fir bark : isolation and characterization of a holocellulose fraction

Diurnal and seasonal changes in xylem water potential, stomatal conductance and abscisic acid in five different habitat types of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco)

First year survival and growth of planting stock of various size on adverse sites

The effect of preconditioning light intensity on photosynthesis of seedlings of two ecotypes of Douglas-fir

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

Douglas-fir bark : n-hexane-soluble and volatile materials

Geographical variation in apparent net photo-synthesis of Rocky Mountain Douglas-fir, Pseudotsuga menziesii var. glauca

Effects of herbaceous weed control on young Douglas-fir moisture stress and growth

Nutrient cycling under 450-year-old Douglas-fir stands

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