Index Catalog // ScholarsArchive@OSU

Yields of repeated high and low commercial thinnings of immature coastal Western hemlock

Creator:: Hilt, Donald E.
Abstract:: Commercial thinnings in a 50-year-old stand of nearly pure, well stocked, even-aged western hemlock (Tsuga heterophylla) on the Hemlock Experimental Forest near Hoquiam, Washington, began in 1952 and ended in 1968. The experiment consisted of two replications of four different thinning treatments, high and low thinning, both at frequent and...
Resource Type:: Masters Thesis

The use of a three-stage sample to estimate the effect of commercial thinning on the growth of two stands of Douglas-fir

Creator:: Graham, Joseph Nelson
Abstract:: A three stage sale was taken of two high-site, second growth Doug1as-fir (Pseudtsuga menziesii) stands located in the extreme northwestern portion of the Oregon Coast Range. Permanent plots were established during the first stage variable-plot cruise. A Hartley- List sample, taken from the first stage Douglas-fir in trees, selected second...
Resource Type:: Masters Thesis

The effect of thinning intensity upon understory growth and species composition in an Oregon Coast Range Pseudotsuga menziesii stand

Creator:: Witler, Jerome Warren
Abstract:: Cover, frequency, and biomass of under story vegetation were estimated on 14 study plots in a central Oregon Coast Range Pseudotsuga menziesii stand. The treatments included a control and three different thinning intensities. Basal area of active growing stock, defined as young-growth P. menziesii with diameter at breast height of...
Resource Type:: Masters Thesis

The evaluation of competitive stress index as a measure of stand density for young growth Douglas-fir

Creator:: Smith, Stephen H.
Abstract:: The study evaluates the use of Competitive Stress Index (CSI) as a quantitative measure of stand density in a young-growth Douglas-fir stand in Western Oregon which had been subjected to various thinning regimes. Operational applications of the index are examined and new methodologies presented for the analysis of tree and...
Resource Type:: Masters Thesis

Simulating skyline yarding in thinning young forests

Creator:: Sinner, Hans-Ulrich
Abstract:: Cable logging systems are being applied frequently in thinning young-growth forests, but the dynamics of these systems are relatively unknown. This study is part of a research project to develop aerial logging systems for thinning and to analyze them for economic, silvicultural, and environmental implications. The objectives of my study...
Resource Type:: Masters Thesis

The effect of forest stand thinning on selected strength and pulp-ing characteristics of Douglas-fir

Creator:: Johnson, Donna A.
Abstract:: The purpose of this study was to determine if amount and kind of thinning had an effect on wood specific gravity, modulus of rupture, modulus of elasticity, growth rate, or pulp yield and kappa number. The study involved 24 1/5-acre plots, three plots in each of eight thinning treatments. The...
Resource Type:: Masters Thesis
Full Text:: FOREST STAND THINNING ON SELECTED STRENGTH AND PULPING CHARACTERISTICS OF DOUGLAS-FIR INTRODUCTION

Prebunching with a low investment skyline yarder in thinnings

Creator:: Keller, Robert Richard
Abstract:: This study compares the production rates and yarding costs of prebunching with a low investment skyline yarder and swinging with a larger skyline yarder to full-cycle thinning with the larger yarder The study analyzes two slackpulling techniques (manual and haulback assisted) and two carriages (a multi-span carriage and a clamping...
Resource Type:: Masters Thesis
Full Text:: degree of Master of Science in Forest Engi- neering presented on November 30, 1979. Title: PREBUNCHING

An efficient optimizing model for determining thinning regime and rotation age using the stand projection system growth simulator

Creator:: Yoshimoto, Atsushi
Abstract:: The PATH algorithm, which is the efficient dynamic programming algorithm developed by Paredes and Brodie (1987) was interpreted from a different point of view. This modification of the PATH algorithm by the calculus of variations vastly diminished the calculation task and memory required to store optimal stands at each stage....
Resource Type:: Masters Thesis
Full Text:: thinning regime at each stage in the following way: First SOS creates the initial forest stand structure

Effect of thinning Douglas-fir on soil moisture, temperature and nitrogen relations

Creator:: André, Johnnie Edgar
Resource Type:: Masters Thesis
Full Text:: forest floor was approx imately proportional to the degree of thinning. One of the most pronounced

Thinning response in Alnus rubra and Arbutus menziesii : effects of spacing, light, and moisture

Creator:: Kim, Sang-kyun
Abstract:: In western Oregon, hardwood trees occupy 20% of the timberland but account for less than 1% of the timber harvest. Information about how to manage them effectively is limited. The objective of this study was to examine: 1) effect of thinning on tree growth, plant moisture stress, and crown cover...
Resource Type:: Masters Thesis

ScholarsArchive@OSU

Yields of repeated high and low commercial thinnings of immature coastal Western hemlock

The use of a three-stage sample to estimate the effect of commercial thinning on the growth of two stands of Douglas-fir

The effect of thinning intensity upon understory growth and species composition in an Oregon Coast Range Pseudotsuga menziesii stand

The evaluation of competitive stress index as a measure of stand density for young growth Douglas-fir

Simulating skyline yarding in thinning young forests

The effect of forest stand thinning on selected strength and pulp-ing characteristics of Douglas-fir

Prebunching with a low investment skyline yarder in thinnings

An efficient optimizing model for determining thinning regime and rotation age using the stand projection system growth simulator

Effect of thinning Douglas-fir on soil moisture, temperature and nitrogen relations

Thinning response in Alnus rubra and Arbutus menziesii : effects of spacing, light, and moisture

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