Index Catalog // ScholarsArchive@OSU

Effects of thermoperiod on the early growth of red alder from different elevations and geographic sources

Creator:: Campbell, Allan, 1936-
Abstract:: This study was designed to help elucidate what differences, if any, exist within the species Alnus rubra Bong., grown naturally at various elevations and locations throughout the Pacific Northwest and coastal Alaska. Increasing importance of the species, including both economic and silviculture values, prompted the investigation into the early growth...
Resource Type:: Masters Thesis

Biomass and composition of the understory vegetation in some Alnus rubra stands in western Oregon

Creator:: Henderson, Jan A.
Abstract:: The biomass and the composition of 15 stands of red alder (Alnus rubra Bong.) on river bottom sites in western Oregon was measured during August and early September, 1969. These stands ranged in age from two to 64 years. Biomass was found to vary from 134 k/ha (kilograms per hectare)...
Resource Type:: Masters Thesis

Nitrogen dynamics in red alder

Creator:: Swanston, Christopher W.
Abstract:: Red alder (Alnus rubra Bong.) is recognized as an important source of nitrogen to ecosystems that it inhabits. I examined N dynamics within alder trees, alder leaf litter, and the soil beneath alder leaf litter. ¹⁵Nitrogen, a stable isotope of N, was used as a tracer to follow the movement...
Resource Type:: Masters Thesis

Influence of soil and rhizosphere actinomycetes on Frankia infection and nitrogenase activity in Alnus rubra Bong

Creator:: Rojas-Melo, Nestor S.
Abstract:: Nodulated roots of young red alder trees and soil samples were collected from a 5 year old clearcut on Mary's Peak, Oregon. Frankia was isolated from root nodules, andactinomycetes from nodules, roots, and soil. A total of 229 pure culture actinomycete isolates were recovered: 131 colonies from root surfaces, 52...
Resource Type:: Masters Thesis

Seasonal and diurnal trends of leaf water potential and stomatal conductance of red alder (Alnus rubra Bong) growing along a density gradient in western Oregon

Creator:: Lu, Shengjun
Abstract:: Three Nelder plots of 3-year-old red alder (Alnus rubra Bong) were used for this study at the Cascade Head Experimental Forest, Oregon in the growing season of 1988 at an elevation of 330 meters. Each Nelder plot represented a range of densities from 238 to 101,219 trees per hectare. The...
Resource Type:: Masters Thesis

Seasonal estimates of nitrogen fixation by Alnus rubra and Ceanothus species in western Oregon forest ecosystems

Creator:: Kim, Dong Yeob
Abstract:: Two case studies of 5 ecosystems were used to examine the nitrogen fixation rate of red alder (Alnus rubra Bong.), varnishleaf (Ceanothus velutinus var. laevigatus (Hook.) T. & G.), deerbrush (C. i ntegerrimus H. & A.), and snowbrush (C. velutinus var. velutinus Dougl. Ex Hook). The first case study assayed...
Resource Type:: Masters Thesis
Full Text:: nitrogen fixation rate of red alder (Alnus rubra Bong.), varnishleaf (Ceanothus velutinus var. laevigatus

Effects of planting density and thinning on growth, stem form, and crown recession in young red alder

Creator:: Lewis, Robert G. (Robert Gorden), 1959-
Abstract:: Stem growth, stem form development, and the dynamics of crown recession in young red alder (Alnus rubra Bong.) were studied by analyzing annual growth rings of stems and knots, annual height increments, projected crown areas, and branch diameters. Forty-one trees were sampled from three plantation spacing studies, representing ages 1...
Resource Type:: Masters Thesis

Two-stage high-yield sulfite pulping of red alder (Alnus rubra Bong.)

Creator:: Hansen, Edward Dee
Abstract:: Two-stage sulfite pulping conditions were determined which produced a high-yield high-hemicellulose pulp from red alder (Alnus rubra Bong.). Those cooks with a bisulfite first-stage and an alkaline second-stage produced pulps with the highest hemicellulose content and the highest strength properties. The major hemicellulose in red alder is 0-acetyl-(4-0- methylglucurono)xylan. Removal...
Resource Type:: Masters Thesis

The role of density and proportion in allometric equations of Douglas-fir and red alder seedlings

Creator:: Cooke, Pamela T.
Abstract:: Allometric equations are useful tools for predicting tree biomass when direct measurements are impractical. Any factor affecting plant growth can be a significant variable in allometric equations. Density and species proportion are spatial variables that influence tree growth and should be considered when developing allometric equations. This consideration is especially...
Resource Type:: Masters Thesis

Juvenile development of Douglas-fir, red alder and snowbrush associations in Western Oregon

Creator:: El Hassan, Babiker Ahmed
Abstract:: The juvenile development of Douglas-fir, red alder and snowbrush associations was investigated in western Oregon. The relationship between Douglas-fir and red alder was studied and compared in the Coast, Willamette Valley and Cascade regions. Snowbrush- Douglas-fir stands were sampled in the western Cascades. Alder- Douglas-fir relationships were studied on clearcuts...
Resource Type:: Masters Thesis

ScholarsArchive@OSU

Effects of thermoperiod on the early growth of red alder from different elevations and geographic sources

Biomass and composition of the understory vegetation in some Alnus rubra stands in western Oregon

Nitrogen dynamics in red alder

Influence of soil and rhizosphere actinomycetes on Frankia infection and nitrogenase activity in Alnus rubra Bong

Seasonal and diurnal trends of leaf water potential and stomatal conductance of red alder (Alnus rubra Bong) growing along a density gradient in western Oregon

Seasonal estimates of nitrogen fixation by Alnus rubra and Ceanothus species in western Oregon forest ecosystems

Effects of planting density and thinning on growth, stem form, and crown recession in young red alder

Two-stage high-yield sulfite pulping of red alder (Alnus rubra Bong.)

The role of density and proportion in allometric equations of Douglas-fir and red alder seedlings

Juvenile development of Douglas-fir, red alder and snowbrush associations in Western Oregon

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