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Westpro A Computer Program For Simulating Uneven Aged Douglas Fir Stand Growth And Yield In The Pacific Northwest
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Book Synopsis WestPro, a Computer Program for Simulating Uneven-aged Douglas-fir Stand Growth and Yield in the Pacific Northwest by :
Download or read book WestPro, a Computer Program for Simulating Uneven-aged Douglas-fir Stand Growth and Yield in the Pacific Northwest written by and published by . This book was released on 2003 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 hardwood trees per acre by diameter class, WestPro predicts the future stand state for each year of a predetermined time horizon. Management regimes are defined by a target stand distribution and a cutting cycle. Performance indicators include diversity of tree size and species, timber yield, and net present value of harvest over the given horizon. This paper contains background information on the WestPro program and instructions and suggestions for its application. By working the examples found in the text, the user will learn how to simulate the growth of a given initial stand and to predict how different management regimes may affect stand structure, yield, and diversity. Limitations of the model also are discussed.
Book Synopsis General Technical Report PNW-GTR by :
Download or read book General Technical Report PNW-GTR written by and published by . This book was released on 2003 with total page 578 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book WestProPlus written by Jingjing Liang and published by . This book was released on 2006 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: WestProPlus is an add-in program developed to work with Microsoft Excel to simulate the growth and management of all-aged Douglas-fir and western hemlock stands in Oregon and Washington.
Download or read book CalPro written by Jingjing Liang and published by . This book was released on 2004 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 trees per acre in each of nineteen 2-inch diameter classes in two species groups, hardwoods and softwoods. CalPro allows managers to predict stand development by year and for many decades from a specific initial state. Users can choose cutting regimes by specifying the interval between harvests (cutting cycle) and a target distribution of trees remaining after harvest. A target distribution can be a reverse-J-shaped distribution or any other desired distribution. Diameter-limit cuts can also be simulated. Tabulated and graphic results show diameter distributions, basal area, volumes, income, net present value, and indices of stand diversity by species and size. This manual documents the program installation and activation, provides suggestions for working with Excel, and gives background information on CalPros growth model. It offers a comprehensive tutorial in the form of two practical examples that explain how to start the program, enter simulation data, execute a simulation, compare simulations, and plot summary statistics.
Book Synopsis Monthly Catalog of United States Government Publications by :
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 2003 with total page 736 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Growth and Yield Model for Uneven-aged Douglas-fir Forests in the Pacific Northwest, Computer Simulation and Management Applications by : Rebecca E. Ralston
Download or read book A Growth and Yield Model for Uneven-aged Douglas-fir Forests in the Pacific Northwest, Computer Simulation and Management Applications written by Rebecca E. Ralston and published by . This book was released on 2002 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis 2003 Science Accomplishments of the Pacific Northwest Research Station by : Pacific Northwest Research Station (Portland, Or.)
Download or read book 2003 Science Accomplishments of the Pacific Northwest Research Station written by Pacific Northwest Research Station (Portland, Or.) and published by . This book was released on 2004 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Factors Influencing Understory Douglas-fir Vigor in Multi-cohort Prairie Colonization Stands Af Fort Lewis, Washington by : Derek John Churchill
Download or read book Factors Influencing Understory Douglas-fir Vigor in Multi-cohort Prairie Colonization Stands Af Fort Lewis, Washington written by Derek John Churchill and published by . This book was released on 2005 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Managing Forests for Diversity, Wood Quality and Income by : Jingjing Liang
Download or read book Managing Forests for Diversity, Wood Quality and Income written by Jingjing Liang and published by . This book was released on 2005 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis User's Guide to OAKSIM by : Donald E. Hilt
Download or read book User's Guide to OAKSIM written by Donald E. Hilt and published by . This book was released on 1985 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: Met dit computerprogramma kunnen groei- en opbrengstprojecties worden opgesteld voor verschillende dunningsmogelijkheden tot zo'n 50 jaar
Book Synopsis User's Manual for a Computer Program for Simulating Intensively Managed Allowable Cut by : Robert W. Sassaman
Download or read book User's Manual for a Computer Program for Simulating Intensively Managed Allowable Cut written by Robert W. Sassaman and published by . This book was released on 1972 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: Detailed operating instructions are described for SIMAC, a computerized forest simulation model which calculates the allowable cut assuming volume regulation for forests with intensively managed stands. A sample problem illustrates the required inputs and expected output. SIMAC is written in FORTRAN IV and runs on a CDC 6400 computer with a SCOPE 3.3 operating system. The conceptual basis of the SIMAC method is not discussed in detail.
Book Synopsis Some Simulation Estimates of Mean Annual Increment of Douglas-fir by : Robert O. Curtis
Download or read book Some Simulation Estimates of Mean Annual Increment of Douglas-fir written by Robert O. Curtis and published by . This book was released on 1994 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Growth-simulation Model for Lodgepole Pine in Central Oregon by : Walter G. Dahms
Download or read book Growth-simulation Model for Lodgepole Pine in Central Oregon written by Walter G. Dahms and published by . This book was released on 1983 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book OAKSIM written by Donald E. Hilt and published by . This book was released on 1985 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: S2OAKSIM is an individual-tree growth and yield simulator for managed, even-aged, upland oak stands. Growth and yield projections for various thinning alternatives can be made with OAKSIM for up to 50 years. Simulator components include an individual-tree diameter growth model, a mortality model, height prediction equations, bark ratio equations, a taper based volume system, and a mathematical thinning rule based on actual data. The range of age, site, and stand conditions to which OAKSIM can be applied is discussed, and a numerical example is used to demonstrate computer output generated by the simulator.S3.
Book Synopsis Accelerating Development of Late-successional Conditions in Young Managed Douglas-fir Stands by : Steven Lee Garman
Download or read book Accelerating Development of Late-successional Conditions in Young Managed Douglas-fir Stands written by Steven Lee Garman and published by . This book was released on 2003 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal of this simulation study was to provide information for defining thinning regimes for young Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) stands in the Central Cascades Adaptive Management Area, located in west-central Oregon. Specifically, this study used the ZELIG. PNW (3.0) gap model to evaluate effects of experimental thinning treatments on the development of late-successional attributes and on extracted merchantable volume. Sixty-four thinning treatments were simulated for four rotation intervals (260, 180, 100, and 80 years) starting with a 40-year-old managed Douglas-fir stand. The amount of time for five late successional attributes to reach defined threshold levels, long-term developmental trends of these attributes, and amount of extracted merchantable volume were recorded for each treatment. Stand conditions of selected treatments were used in a subsequent harvest rotation in which 64 additional experimental thinning treatments were applied and evaluated. A total of 1,744 thinning treatments was evaluated in this study. Results of this study confirm previous recommendations for accelerating development of late-successional attributes in young managed stands. Additionally, results show the potential for a range of thinning treatments to attain late-successional conditions in about the same amount of time, but with different tradeoffs in terms of merchantable volume and long-term stand conditions. In general, heavy thinning of existing stands at ages 40 and 60 years promoted rapid development of large boles, vertical diversity, and tree-species diversity, but provided the least amount of extracted volume and required artificial creation of dead wood. Treatments that retained more than 40 percent of the original overstory and thinned to 99 trees per hectare at age 60 delayed attainment of late-successional conditions by 10 to 30 years but provided 12 to 20 percent more extracted volume, resulted in higher levels of most late-successional attributes at the end of a rotation, and required less artificial creation of dead wood. Treatments providing the fastest development of late-successional conditions in subsequent rotations varied with the amount of canopy cover retained at the end of the first rotation. For stands starting with ÃÃY30 percent canopy cover, delaying the first commercial thin for 40 years promoted the most rapid development of vertical structure and shadetolerant stems. Lower canopy-retention levels required heavy or light thins in subsequent entries, depending on the rotation interval, for rapid development of late-successional attributes.
Book Synopsis Silvicultural Options for Young-growth Douglas-fir Forests by :
Download or read book Silvicultural Options for Young-growth Douglas-fir Forests written by and published by . This book was released on 2004 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes the origin, design, establishment and measurement procedures and first results of a large long-term cooperative study comparing a number of widely different silvicultural regimes applied to young-growth Douglas-fir (Pseudotsuga menziesii) stands managed for multiple objectives. Regimes consist of (1) conventional clearcutting followed by intermediate thinning; (2) retention of reserve trees to create a two-aged stand; (3) small patch cuts dispersed within a thinned matrix, repeated at approximately 15-year intervals to create a mosaic of age classes; (4) group selection within a thinned matrix on an approximate 15-year cycle; (5) continued thinning on an extended rotation; and (6) an untreated control. Each of these regimes is on operationsize units (about 30 to 70 acres each). Output variables to be evaluated include conventional timber growth and yield statistics, harvest costs, sale layout and administration costs, aesthetic effects and public acceptance, soil disturbance, bird populations, and economic aspects. Descriptive statistics and some initial results are presented for the first replicate, established in 1997-98.
Book Synopsis Effects of Thinning on Yield of Douglas-fir by : Donald L. Reukema
Download or read book Effects of Thinning on Yield of Douglas-fir written by Donald L. Reukema and published by . This book was released on 1977 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
