Treesearch

A science perspective of forest health in the Blue Mountains is summarized by using both historical and biological information. Many of the current pest problems are related to human activities that have occurred over the last 90 years. The almost complete loss of periodic low-intensity fires since 1900 plus extensive logging of pine have resulted in many thousands of acres of fir occupying pine sites. These fir forests are highly susceptible to pests and to catastrophic forest fires. Some long-term management strategies are now needed to alleviate the problems. Research recommendations...

Timber sales offered at the Blue River Ranger District since the 1988 introduction of management for stand structural retention were studied to describe and quantify, where possible, economic implications of that management. Values for the potential lumber from merchantable green trees ranged from $102 to $1114 per acre among the harvest units surveyed thus far. Protecting residual stand structure by not broadcast burning created an average savings of $237 per unburned acre. When postsale snag creation was necessary to meet stand prescription requirements, average topping cost per tree was...

Logging residues were broadcast burned, piled and burned, removed, or left in place after clearcutting in a high-elevation subalpine fir (Abies lasiocarpa (Hook.) Nutt.) lodgepole pine (Pinus contorta Dougl. ex Loud.) forest in north-central Washington. Survival, height growth and foliar nutrient content of planted Douglas-fir (Pseudotsuga menziesii var. glauca (Beissn.) Franco) and lodgepole pine seedlings, variations in soil factors (nutrients, temperature, moisture, and compaction), and air temperature were compared for four residue treatments. First- and second-year survival of...

The DFPRUNE spreadsheet program is designed to estimate the expected financial return from pruning coast Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco var. menziesii. It is a significant revision of the PRUNE-SIM program. The PRUNE-SIM program was based on the average product recovery for unpruned logs from a single stand that received frequent light thinnings. The DFPRUNE program incorporates new recovery information for unpruned young-growth Douglas-fir and can be used to assess the economic potential of pruning for a wide range of management regimes. Product prices and descriptions...

A program for receiving sampling data for all immature stages of the western spruce budworm (Choristoneura occidentals Freeman) is described. Versions were designed to be used on field data recorders with either CP/M or DOS operating systems, such as the HUSKY HUNTER (Models 1, 2, and 16), but they also may be used on personal computers with compatible operating systems. The algorithm for the program was derived, primarily, from the findings of Srivastava and others (1984). The program allows the user to review the current plot statistics, including sampling precision, at any time while...

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 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.