Treesearch

We investigated the distribution of biomass and nutrients in lodgepole pine (Pinus contorta var. murryana Dougl.) ecosystems on pumice soils in south-central Oregon. Sixty-three trees were sampled to develop equations for estimating dry weights of tree crowns, boles, bark, and coarse roots from diameter at breast height and height. The concentrations of total carbon, nitrogen, phosphorus, and sulfur were determined for each of these components. Biomass, nutrient concentrations, and nutrient contents of the associated vegetation, forest floor, woody debris, fine roots, and soil horizons...

This book is an examination of how vandalism is being approached through research, law enforcement, education, design, understanding human behavior, innovative ideas, and integrated programs. An introductory section provides theoretical and empirical perspectives on vandalism. Chapters describe the role of research in designing against vandalism, psycho-social definitions, and new orientations toward depreciative behavior. Empirical studies of an urban youth subculture, characteristics of (railhead vandalism, effectiveness of trailside sign texts, and a brochure on reducing vandalism are...

This report summarizes a 1988-90 timber resource inventory of 19 counties in western Washington: Clallam, Clark, Cowlitz, Grays Harbor, Island, Jefferson, King, Kitsap, Lewis, Mason, Pacific, Pierce, San Juan, Skagit, Skamania, Snohomish, Thurston, Wahkiakum, and Whatcom. Detailed tables of forest area, timber volume, growth, mortality, and harvest are presented.

This document traces the history of the Starkey Experimental Forest and Range since its establishment on July 11, 1940. It recalls the historical process of community development and the evolution of forest, range, and wildlife exploitation, which produced the conditions making the area appropriate for a research station. This paper recounts the comings and goings of research personnel through a half century of activities and program development. The author also analyzes a succession of events that have brought about ecological changes on the Starkey Range. Included is a list of publication...

This report presents the findings of a survey of all primary forest products industries in Oregon for 1988. The survey included the following sectors: lumber; veneer and plywood; pulp and board; shake and shingle; export; and post, pole, and piling. Tables, presented by sector and for the industry as a whole, include characteristics of the industry, nature and flow of logs consumed, and disposition of mill residues.

Provides current information on lumber and plywood production and prices; employment in the forest industries; international trade in logs, lumber, and plywood; volume and average prices of stumpage sold by public agencies; and other related items.

This paper instructs resource analysts on using the southeast Alaska multiresource model (SAMM). SAMM is an interactive microcomputer program that allows users to explore relations among several resources in southeast Alaska (timber, anadromous fish. deer, and hydrology) and the effects of timber management activities (logging, thinning, and road building) on those relations and resources. This guide assists users in installing SAMM on a microcomputer, developing input data files, making simulation runs, and storing output data for external analysis and graphic display.

We evaluated a technique for measuring body fat content of marten (Martes americana) by using a noninvasive bioelectrical-impedance device with four electrodes to introduce a current into the body. Instantaneous readings of resistance were significantly correlated with fat-free mass (determined from solvent extraction) of carcasses of 17 skinned (r = 0.83, P = 0.01) and 6 intact (r = 0.89, P = 0.03) marten. Estimates of percentage of body fat were not accurate among skinned animals but were accurate among unskinned animals. With further refinement, this technique may be useful because the...

Open-pollinated Douglas-fir (Pseudotsuga menziesii var menziesii (Mirb.) Franco) families were tested in three contrasting competitive environments to test the hypothesis that relative performance as measured by total seedling dry weight is dependent upon distance or genotype of neighbors. The three competitive environments included (1) a mixture of individuals from all families planted at close spacing, (2) single (pure) family blocks planted at close spacing, and (3) individuals from all families planted at a wide, none-competitive spacing. Despite occasional large changes in rank...

Forest resource supply analysis has increasingly been done in an economic market context. Little work has been done to assess the environmental consequences of a change in timber harvests that would result in a shift in competing markets. The purpose of this study was to estimate a relation among construction materials as they are used as substitutes or complements of each other and to qualitatively assess the environmental consequences of the extraction, manufacture, use, and disposal of wood products, steel, cement, aluminum, and plastics. Lumber cross price elasticities with competing...