Displaying 101 - 120 of 188
Leenhouts
ANNOTATION: Wildland fire has been an integral part of the landscape of the conterminous United States for millennia. Analysis of contemporary and pre-industrial (~ 200 - 500 yr BP) conditions, using potential natural vegetation, satellite imagery, and…
Year: 1998
Type: Document
Source: FRAMES, TTRS
ANNOTATION: This report examines the domestic and international markets for biopower. Domestic and foreign markets present fundamentally different challenges to private power developers. The domestic challenge lies in finding economically viable…
Year: 1998
Type: Document
Source: FRAMES
Sedjo
ANNOTATION: This paper undertakes a preliminary exploration into the economics of generating energy from forest-based biomass. The study assesses the feasibility of greatly expanding the share of total energy consumption in developed countries that could…
Year: 1997
Type: Document
Source: FRAMES
Hartsough, Drews, McNeel, Durston, Stokes
ANNOTATION: Presents a comparative study of three systems used for thinning pine plantations and mixed conifer stands. Whole-tree methods; Cut-to-length systems; Hybrid systems. All three produced small sawlogs and fuel chips. Time-motion data were…
Year: 1997
Type: Document
Source: FRAMES
Ter-Mikaelian, Korzukhin
ANNOTATION: The paper presents a comprehensive review of the biomass equations for 65 North American tree species. All equations are of the form M = aDb, where M is the oven-dry weight of the biomass component of a tree (kg), D is diameter at breast…
Year: 1997
Type: Document
Source: FRAMES
Hardy
ANNOTATION: Guidelines in the form of a six-step approach are provided for estimating volumes, oven-dry mass, consumption, and particulate matter emissions for piled logging debris. Seven stylized pile shapes and their associated geometric volume formulae…
Year: 1996
Type: Document
Source: FRAMES
Means, Krankina, Jiang, Li
ABSTRACT: This paper describes use of BIOPAK to calculate size classes of live fuels for shrubs and herbs. A library of equations to estimate such fuels in the Pacific Northwest and northern Rocky Mountains is presented and used in an example. These…
Year: 1996
Type: Document
Source: FRAMES
Puttock
ANNOTATION: Often the deciding factor in the economical recovery of wood fuel is its relationship with some other objective such as stand establishment, stand improvement, or forest access. The costs and benefits arising from these related management…
Year: 1995
Type: Document
Source: FRAMES
Gingras
ANNOTATION: This report summarizes the progress achieved under the auspices of the Activity 'Harvesting small trees and forest residues' during 1992-1994. The work performed included literature reviews to assess potentially recoverable material as a…
Year: 1995
Type: Document
Source: FRAMES
Angus-Hankin, Stokes, Twaddle
ANNOTATION: In spite of this simplicity secondary transport is typically responsible for between 20 and 40% of the delivered fuel cost. To achieve a full payload within maximum allowable load dimension restrictions the material transported must have a…
Year: 1995
Type: Document
Source: FRAMES
Keegan, Fiedler, Stewart
ANNOTATION: Harvest costs were estimated for New Forestry silvicultural prescriptions designed for application on national forest lands in western Montana. Estimates were derived using an expert opinion format and were compared using constant dollars with…
Year: 1995
Type: Document
Source: FRAMES
Kellogg, Bettinger
ANNOTATION: This production study of the single-grip harvester and forwarder combination looks at productive machine hour, delay-free PMH rates in a second growth thinning operation in western Oregon. Rates of production of marked by forester trees and…
Year: 1994
Type: Document
Source: FRAMES
Watson, Stokes
ANNOTATION: The cost and utilization were compared for a thinning operation removing the stems as roundwood with a flail chipper operation. The flail chipper operation recovered an additional 4.2 tons of acceptable chips per acre which resulted in a…
Year: 1994
Type: Document
Source: FRAMES
Means, Hansen, Koerper, Alaback, Klopsch
BIOPAK is a menu-driven package of computer programs for IBM-compatible personal computers that calculates the biomass, area, height, length, or volume of plant components (leaves, branches, stem, crown, and roots). The routines were written in FoxPro,…
Year: 1994
Type: Document
Source: FRAMES
Stokes, McDonald, Kelley
ANNOTATION: High transport costs are a factor to consider in the use of forest residues for fuel. Costs can be reduced by increasing haul capacities, reducing high moisture contents, and improving trucking efficiency. The literature for transpirational…
Year: 1993
Type: Document
Source: FRAMES
Stokes
ANNOTATION: Eight countries collaborated and shared technical information on the harvesting of small trees and forest residues in a three year program. Proceedings and reports from workshops and reviews are summarized in a review of activities and…
Year: 1992
Type: Document
Source: FRAMES
Kirkland, Steinhagen, Campbell
ANNOTATION: The University of Idaho converted its campus steam generating plant from natural gas to wood residue fuel. The combustion system typically burns chipped or hogged wood fuel 2 inches or less, at 35 to 50 percent moisture content (wet basis).Pre…
Year: 1991
Type: Document
Source: FRAMES
Young, Ostermeier, Thomas, Brooks
ANNOTATION: In this paper a deterministic model was developed to estimate the average total cost of producing whole tree chips for energy production. The model estimated harvest, transportation and stumpage costs and total costs were estimated for 62…
Year: 1991
Type: Document
Source: FRAMES
Manfredo, Fishbein, Hass, Watson
ANNOTATION: This article discusses social considerations with respect to public wildland forest fire policy. Social attitudes, beliefs and behavioral intentions of wildland fire are described as well as the public's knowledge of the effects of fire. This…
Year: 1990
Type: Document
Source: FRAMES, TTRS
Hartsough, Stokes
ANNOTATION: In this study a database of North American harvesting systems was developed. Parameters for each system included site, material and product characteristics, equipment mix and production rate. Onto-truck and delivered costs per green tonne, and…
Year: 1990
Type: Document
Source: FRAMES
