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139 results found
The STHARVEST computer application is Windows-based, public-domain software used to estimate costs for harvesting small-diameter stands or the small-diameter component of a mixed-sized stand. The equipment production rates were developed from existing studies. Equipment operating cost rates were…
Author(s): Roger D. Fight, Xiaoshan Zhang, Bruce R. Hartsough
Keywords: Cost (logging), logging economics, timber management planning, software, simulation
Source: Gen. Tech. Rep. PNW-GTR-582. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 12 p
Year: 2003
A survey of numerous field studies shows that nitrogen and phosphorous export coefficients are significantly different across forest, agriculture, and urban land-cover types. We used simulations to estimate the land-cover composition at which there was a significant risk of nutrient loads…
Author(s): James D. Wickham, Kurt H. Riitters, Robert V. O'Neill, Kenneth H. Reckhow, Timothy G. Wade, K. Bruce Jones
Keywords: nutrient export, risk analysis, simulation
Source: Journal of the American Water Resources Association 36(6): 39-46
Year: 2000
WestPro is an add-in program designed to work with Microsoft Excel to simulate the growth of uneven-aged Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) stands in the Pacific Northwest region of the United States. Given the initial stand state, defined as the number of softwood and…
Author(s): Rebecca Ralston, Joseph Buongiorno, Benedict Schulte, Jeremy Fried
Keywords: Douglas-fir, Pseudotsuga menziesii, uneven-aged, management, economics, ecology, WestPro, simulation, software, growth model, diversity
Source: Gen. Tech. Rep. PNW-GTR-574. Portland, OR : U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 25 p
Year: 2003
The design of a rough mill for the production of interior furniture parts is used to illustrate a simulation technique for analyzing and evaluating established and proposed sequential production systems. Distributions representing the real-world random characteristics of lumber, equipment feed…
Author(s): Philip A. Araman
Keywords: models, simulation, operations research, systems analysis, plant layout, computer programs
Source: FS Research Paper NE-361. 9 pp.
Year: 1977
The adaptive environmental assessment method was used by an interdisciplinary team of forest specialists to gain an understanding of resource interactions and tradeoffs resulting from forest management activities in southeast Alaska. A forest multiresource projection model was developed in the…
Author(s): Roger D. Fight, Lawrence D. Garrett, Dale L. Weyermann
Keywords: Multiresource, forest management, systems, models, southeast Alaska, simulation
Source: Gen. Tech. Rep. PNW-GTR-255. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 109 p
Year: 1990
This paper summarizes research on the management of uneven-aged loblolly pine-hardwood stands in the southern United States. This research was composed of three elements: (1) modeling of biological growth of uneven-aged stands of mixed loblolly pine and hardwood trees, (2) optimization to discover…
Author(s): Joseph Buongiorno, Benedict Schulte, Kenneth E. Skog
Keywords: uneven-aged, loblolly pine, hardwoods, south, silviculture, economics, linear programming, simulation, biometrics
Source: Gen. Tech. Rep. FPL-CTR-145. Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products Laboratory. 5 p.
Year: 2004
This manuscript provides information needed for the user to access current information about forest growth and yield simulators. Ultimately, the best source of information for any simulator is the user’s guide and the sage advice of those who built the simulator. In some instances, these people are…
Author(s): Martin W. Ritchie
Keywords: computer models, simulation
Source: Gen. Tech. Rep. PSW-GTR-174. Albany CA: Pacific Southwest Research Station, Forest Service, U.S. Department of Agriculture; 59 p.
Year: 1999
Reviews literature about nine forest harvesting simulation models with potential for simulating southern operations. From the nine, five appearusefulenough to warrant further analysis.An annotated bibliography of associated forest harvesting simulation literature is appended.
Author(s): Daniel V. Goulet, Donald L. Sirois, Ronald H. Iff
Keywords: simulation, logging, computer models, forest harvesting, survey, planning
Source: Gen. Tech. Rep. SO-25. New Orleans, LA: U.S. Dept of Agriculture, Forest Service, Southern Forest Experiment Station. 15 p.
Year: 1979
A forest landscape visualization system was developed and used in creating realistic images depicting how an area might appear if harvested. The system uses a ray-tracing renderer to draw model trees on a virtual landscape. The system includes components to create landscape surfaces from digital…
Author(s): Tim McDonald, Bryce Stokes
Keywords: simulation, visualization, forestry, aesthetics, forest harvest
Source: Seventh Annual Conference: Computers In Agriculture Proceedings
Year: 1998
CalPro is an add-in program developed to work with Microsoft Excel to simulate the growth and management of uneven-aged mixed-conifer stands in California. Its built-in growth model was calibrated from 177 uneven-aged plots on industry and other private lands. Stands are described by the number of…
Author(s): Jingjing Liang, Joseph Buongiorno, Robert A. Monserud
Keywords: Mixed conifers, uneven-aged management, economics, ecology, CalPro, simulation, software, growth model, diversity
Source: Gen. Tech. Rep. PNW-GTR-619. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 32 p
Year: 2004