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Pilot experiment of forest fertilization during an outbreak of the western spruce budworm in Northeastern Oregon

Creator:: Mason, Richard R., Wickman, B. E., Paul, H. G., and Torgersen, T. R.
Abstract:: Mixed-conifer stands of grand fir (Abies grandis (Dougl. ex D. Don) Lindl., Douglas-fir (Pseudotsuga menziesii var. glauca (Beissn.) Franco), and ponderosa pine (Pinus ponderosa Dougl. ex Laws.) were fertilized with nitrogen and combination treatments of nitrogen, phosphorus, potassium, and sulfur to test their effects on trees and associated insects during...
Resource Type:: Technical Report

Comparative effects of precommercial thinning, urea fertilizer, and red alder in a site 11, coast Douglas-fir plantation

Creator:: Miller, Richard E., Obermeyer, Edmund L., and Anderson, Harry William
Abstract:: The authors varied the number of red alder retained with 300 Douglas-fir per acre on a high-quality site in coastal Oregon. Alder densities of 0, 20, 40, and 80 per acre were tested. The authors' fifth treatment eliminated nitrogen-fixing alder, but substantial nitrogen fertilizer. Treatment 6 had neither thinning nor...
Resource Type:: Technical Report

Seedling survival, mycorrhiza development and rhizosphere biology of Pseudotsuga menziesii seedlings outplanted on a degraded forest site in southwestern Oregon

Creator:: Colinas, Carlos
Abstract:: Inoculation of planting holes with small amounts of soil from a mature forest and a plantation improved survival and growth of Pseudotsuga menziesii seedlings in a degraded clear-cut in southwestern Oregon. To determine the component(s) of the transferred soil responsible for survival and growth increases, we treated forest, plantation and...
Resource Type:: Dissertation

Soil compaction on woodland properties [1991]

Creator:: Adams, Paul W.
Abstract:: Published January 1991. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Resource Type:: Other
Full Text:: 'fóoa iandl5 N 141991 WorlçboolçeThTE LI3RNy Forest Protection P SoIl Compaction on Woodland

Soil compaction on woodland properties

Creator:: Adams, Paul W. and Oregon State University. Extension Service
Abstract:: Revised November 1990. Reprinted March 1998. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Resource Type:: Technical Report
Full Text:: . What is soil compaction? A productive forest soil is a mixture of mineral particles, plant and

Soil compaction on woodland properties

Creator:: Oregon State University. Extension Service and Adams, Paul W.
Abstract:: Soil compaction can happen whenever machinery, livestock, or people travel on the land. On woodlands, compaction is most likely to be caused by logging equipment such as crawler tractors and rubbertired skidders.
Resource Type:: Technical Report
Full Text:: , Oregon State University. What is soil compaction? A productive forest soil is a mixture of mineral

Effects of mulch and forest floor material on soil macro-nutrients in homogenized soil cores

Creator:: Newman, Joseph Paul
Abstract:: Effects of three mulches of tree foliage and twigs (red alder, Douglas-fir, and salal) and homogenized, partially decomposed material (forest floor) on soil macronutrients (Ca, K, Mg, P, NO3, and NH4) were evaluated in the summer of 1997. These effects were measured with buried, coated ion-exchange resin bags at two...
Resource Type:: Masters Thesis

Low molecular weight organic acids in forest soils

Creator:: Hayden, John
Abstract:: Two studies concerning low molecular weight organic acids in soils were conducted. In the first study, anion exclusion chromatography was used to separate and identify 12 common organic acids, and the accuracy, precision and detection limits of the method were determined. The method was found to be sensitive and accurate...
Resource Type:: Masters Thesis
Full Text:: second study, the reaction of a forest soil with oxalic acid at four concentrations was monitored for

Consolidation, compression, and shear strength of four western Oregon forest soils

Creator:: McNabb, David H.
Abstract:: Forest soils with low bulk densities are often considered less susceptible to compaction than soils with higher bulk densities. The objective of this study was to determine if soil strength controlled the compression of soils with low bulk density. Four soils were selected for this evaluation. Three of these were...
Resource Type:: Dissertation
Full Text:: . III. 1. Relationship between bulk density of a sample of western Oregon forest soil, predicted with

Understory vegetation effects on soil nitrogen and soil carbon in thinned and unthinned Douglas-fir forests

Creator:: Geyer, Eric A.
Abstract:: The optimum goal of forest management is to foster long-term productivity and ecological integrity while maintaining or increasing short-term growth and yield through sustainable practices. Understory vegetation plays a definite role in forest functions through nutrient cycling and habitat provisions. The objective of this study was to determine how salal,...
Resource Type:: Masters Thesis
Full Text:: Soil Carbon in Thinned and Unthinned Douglas-fir Forests 1.0 INTRODUCTION Intensive forest

ScholarsArchive@OSU

Pilot experiment of forest fertilization during an outbreak of the western spruce budworm in Northeastern Oregon

Comparative effects of precommercial thinning, urea fertilizer, and red alder in a site 11, coast Douglas-fir plantation

Seedling survival, mycorrhiza development and rhizosphere biology of Pseudotsuga menziesii seedlings outplanted on a degraded forest site in southwestern Oregon

Soil compaction on woodland properties [1991]

Soil compaction on woodland properties

Soil compaction on woodland properties

Effects of mulch and forest floor material on soil macro-nutrients in homogenized soil cores

Low molecular weight organic acids in forest soils

Consolidation, compression, and shear strength of four western Oregon forest soils

Understory vegetation effects on soil nitrogen and soil carbon in thinned and unthinned Douglas-fir forests

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