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Equations For Predicting Height To Crown Base 5 Year Diameter Growth Rate 5 Year Height Growth Rate 5 Year Mortality Rate And Maximum Size Density Trajectory For Douglas Fir And Western Hemlock In The Coastal Region Of The Pacific Northwest
Download Equations For Predicting Height To Crown Base 5 Year Diameter Growth Rate 5 Year Height Growth Rate 5 Year Mortality Rate And Maximum Size Density Trajectory For Douglas Fir And Western Hemlock In The Coastal Region Of The Pacific Northwest full books in PDF, epub, and Kindle. Read online Equations For Predicting Height To Crown Base 5 Year Diameter Growth Rate 5 Year Height Growth Rate 5 Year Mortality Rate And Maximum Size Density Trajectory For Douglas Fir And Western Hemlock In The Coastal Region Of The Pacific Northwest ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Forest Growth and Yield Modeling by : Aaron R. Weiskittel
Download or read book Forest Growth and Yield Modeling written by Aaron R. Weiskittel and published by John Wiley & Sons. This book was released on 2011-08-22 with total page 431 pages. Available in PDF, EPUB and Kindle. Book excerpt: Forest Growth and Yield Modeling synthesizes current scientific literature and provides insights in how models are constructed. Giving suggestions for future developments, and outlining keys for successful implementation of models the book provides a thorough and up-to-date, single source reference for students, researchers and practitioners requiring a current digest of research and methods in the field. The book describes current modelling approaches for predicting forest growth and yield and explores the components that comprise the various modelling approaches. It provides the reader with the tools for evaluating and calibrating growth and yield models and outlines the steps necessary for developing a forest growth and yield model. Single source reference providing an evaluation and synthesis of current scientific literature Detailed descriptions of example models Covers statistical techniques used in forest model construction Accessible, reader-friendly style
Book Synopsis The Management of Industrial Forest Plantations by : José G. Borges
Download or read book The Management of Industrial Forest Plantations written by José G. Borges and published by Springer. This book was released on 2014-09-01 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Management of Industrial Forest Plantations. Theoretical Foundations and Applications provides a synthesis of current knowledge about industrial forestry management planning processes. It covers components of the forest supply chain ranging from modelling techniques to management planning approaches and information and communication technology support. It may provide effective support to education, research and outreach activities that focus on forest industrial plantations management. It may contribute further to support forest managers when developing industrial plantations management plans. The book includes the discussion of applications in 26 Management Planning in Actions boxes. These applications highlight the linkage between theory and practice and the contribution of models, methods and management planning approaches to the efficiency and the effectiveness of industrial plantations management planning.
Book Synopsis Equations for Predicting Height-to-crown-base, 5-year Diameter-growth Rate, 5-year Height-growth Rate, 5-year Mortality Rate, and Maximum Size-density Trajectory for Douglas-fir and Western Hemlock in the Coastal Region of the Pacific Northwest by : David W. Hann
Download or read book Equations for Predicting Height-to-crown-base, 5-year Diameter-growth Rate, 5-year Height-growth Rate, 5-year Mortality Rate, and Maximum Size-density Trajectory for Douglas-fir and Western Hemlock in the Coastal Region of the Pacific Northwest written by David W. Hann and published by . This book was released on 2003 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: Using existing permanent research plot data, we developed equations for predicting height-to-crown-base (HCB), 5-yr diametergrowth rate (delta D), 5-yr height-growth rate (delta H), 5-yr mortality rate (PM), and the maximum size-density trajectory for Douglasfir and western hemlock in the coastal region of the Pacific Northwest. With the exception of the HCB equation, the equations developed for predicting trees from untreated plots agreed in predictive behavior with previously published equations for the study area. The HCB equation predicted shorter HCB (and therefore longer crown lengths [CL]) than previously published equations for the study area. Western hemlock showed no response to fertilization. Modifiers for fertilization response were incorporated into the final equations for predicting delta D, delta H, and PM in Douglas-fir. All three modifiers for Douglas-fir predicted an increase in growth and mortality rates with the amount of nitrogen applied and a decrease with number of years since fertilization, with most of the fertilization effect gone within 15 yr of application. For the delta D and delta H modifiers, the size of the increase varied by the site index (SI) of the plot, with plots of lower site quality showing greater increases. For delta D, fertilization response did not appear to vary by plot density, tree size, or tree position within the plot. Modifiers for thinning response were incorporated into the final equations for predicting tree delta D for both species and delta H for Douglas-fir. For both species, the delta D thinning-effects modifier predicted an increased growth rate with the proportion of the BA removed and a decrease with years since thinning; most of the thinning effect was gone within 10 yr. For Douglas-fir, the delta H thinning-effects modifier predicted a reduced growth rate immediately after thinning, with the size of the reduction increasing with the intensity of thinning. Most of the reduction was gone by about 10 yr. For Douglas-fir, the combined effect on delta D and delta H of applying both thinning and fertilization could be adequately characterized by the product of the thinning modifier and the fertilization modifier. The percent increase in predicted growth rate due to a combined treatment thus was greater than the sum of the percent increases for each treatment alone. Analysis of the maximum size-density trajectory data strongly suggests that plots of neither species approach a single maximum stand density index value (SDI) as they develop. The potential yield for a given site therefore depends, not only on its SI, but also on its maximum SDI. Fertilization does not appear to affect the intercept of the maximum size-density line for Douglas-fir. The strengths and weaknesses of the existing data sets and the modeling and analytical approaches tested during development of these equations are presented to aid future modelers, and alternative modeling approaches are explored.
Book Synopsis Environmental Modelling by : John Wainwright
Download or read book Environmental Modelling written by John Wainwright and published by John Wiley & Sons. This book was released on 2013-04-01 with total page 493 pages. Available in PDF, EPUB and Kindle. Book excerpt: Simulation models are an established method used to investigate processes and solve practical problems in a wide variety of disciplines. Central to the concept of this second edition is the idea that environmental systems are complex, open systems. The authors present the diversity of approaches to dealing with environmental complexity and then encourage readers to make comparisons between these approaches and between different disciplines. Environmental Modelling: Finding Simplicity in Complexity 2nd edition is divided into four main sections: An overview of methods and approaches to modelling. State of the art for modelling environmental processes Tools used and models for management Current and future developments. The second edition evolves from the first by providing additional emphasis and material for those students wishing to specialize in environmental modelling. This edition: Focuses on simplifying complex environmental systems. Reviews current software, tools and techniques for modelling. Gives practical examples from a wide variety of disciplines, e.g. climatology, ecology, hydrology, geomorphology and engineering. Has an associated website containing colour images, links to WWW resources and chapter support pages, including data sets relating to case studies, exercises and model animations. This book is suitable for final year undergraduates and postgraduates in environmental modelling, environmental science, civil engineering and biology who will already be familiar with the subject and are moving on to specialize in the field. It is also designed to appeal to professionals interested in the environmental sciences, including environmental consultants, government employees, civil engineers, geographers, ecologists, meteorologists, and geochemists.
Book Synopsis Reanalysis of the SMC-ORGANON Equations for Diameter-growth Rate, Height-growth Rate, and Mortality Rate of Douglas-fir by : David W. Hann
Download or read book Reanalysis of the SMC-ORGANON Equations for Diameter-growth Rate, Height-growth Rate, and Mortality Rate of Douglas-fir written by David W. Hann and published by . This book was released on 2006 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Using existing data from untreated research plots, we developed equations for predicting 5-yr diameter-growth rate (delta D5), 5-yr height-growth rate (delta H5), and 5-yr mortality rate (PM5) for Douglas-fir [Pseudotsuga menziesii (Mirb.) Franco] in the coastal region of the Pacific Northwest. These equations are revisions of the equations constructed in 1995-1997 for the Stand Management Cooperatives (SMC) version of the ORGANON growth-and-yield model, and they have been developed with substantially larger and more comprehensive data sets than were available in 1995-1997. The new delta D5 and delta H5 equations were validated with an independent data set. The PM5 equation was evaluated by comparing 100-yr predictions of Reinekes (1933) stand density index to behavior previously reported from measurements taken on long-term researchplots. The new delta D5, delta H5, and PM5 equations appear to be considerably superior in predictive ability and behavior to the original equations. The effects of the new equations on stand-level predictions were evaluated by comparing the maximum mean annual increments (MAI) in total stem volume (ft3) and associated rotation ages (RA) predicted from the original SMC-ORGANON model to predictions from the revised SMC-ORGANON model. This analysis was done by making 100-yr projections using 170 plots in young stands from the SMC data sets. Some of the ending values for average crown ratio (CR) after 100 yr of projection were near 15%, however, and predictions of basal area (BA) for some of these stands peaked and then declined over stand age. Substituting the HCB equation published by Hann and Hanus in 2004 for predicting crown recession (delta HCB5) eliminated the problem with BA peaking over stand age and resulted in somewhat larger average ending CRs. The 100-yr projections were then made again with the 2004 HCB equation of Hann and Hanus. On average, the revised model reduced RA by 2.1 yr (or 4.3%) and maximum MAI by 55.7 ft3/ac/yr (18.9%).
Book Synopsis Canadian Journal of Forest Research by :
Download or read book Canadian Journal of Forest Research written by and published by . This book was released on 2008 with total page 696 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Enhanced Diameter-growth-rate Equations for Undamaged and Damaged Trees in Southwest Oregon by : David W. Hann
Download or read book Enhanced Diameter-growth-rate Equations for Undamaged and Damaged Trees in Southwest Oregon written by David W. Hann and published by . This book was released on 2002 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: Equations for predicting the 5-yr diameter-growth rate of a tree are presented for eight conifer and nine hardwood tree species from southwest Oregon. Equation parameters for undamaged and damaged trees combined were estimated by weighted nonlinear regression. The resulting equation for Douglas-fir [Pseudotsuga menziesii (Mirb.) Franco] explained more than 71% of the variation when validated against an independent data set. These equations are being incorporated into the new edition of ORGANON for southwest Oregon, a model for predicting the development of stands. The equations extend the previous model to older stands and stands with a larger component of hardwood. We explored the effects of specific damaging agents on the 5-yr diameter-growth rates of the five most frequently encountered species and estimated damage correction factors. Damaging agents can impact 5-yr diameter-growth rate significantly and, as a result, can lead over time to diversification in stand structure. Therefore, full characterization of stand development should include prediction of the presence and frequency of the agents damaging trees within the stand and their impact on tree attributes such as total height, height-to-crown-base, diameter-growth rate, height-growth rate, and mortality rate.
Book Synopsis Enhanced Height-growth-rate Equations for Undamaged and Damaged Trees in Southwest Oregon by : David W. Hann
Download or read book Enhanced Height-growth-rate Equations for Undamaged and Damaged Trees in Southwest Oregon written by David W. Hann and published by . This book was released on 2002 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: Equations for predicting the 5-yr height growth rate of a tree are presented for six conifer species from southwest Oregon. Equations for the combination of undamaged and damaged trees were estimated with weighted nonlinear regression techniques. These equations are being incorporated into the new southwest Oregon version of ORGANON, a model for predicting the development of stands. The equations extend the previous model to older stands and to stands with a heavier component of hardwood tree species. The effects of specific damaging agents on the 5-yr height growth rate were explored for Douglas-fir, the most frequently encountered species, and damage correction factors were estimated. The findings of this analysis indicated that damaging agents can have a significant impact upon 5-yr height growth rate, and as a result, they can lead, over time, to diversification in within-stand structure. Therefore, a full characterization of stand development should include the prediction of the presence and frequency of the various damaging agents affecting trees within the stand and their subsequent impact upon tree attributes such as total height, height to crown base, diameter growth rate, height growth rate, and mortality rate.
Book Synopsis Annual Report by : Oregon State University. Swiss Needle Cast Cooperative
Download or read book Annual Report written by Oregon State University. Swiss Needle Cast Cooperative and published by . This book was released on 2007 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Nonlinear Regression Modeling by : David A. Ratkowsky
Download or read book Nonlinear Regression Modeling written by David A. Ratkowsky and published by . This book was released on 1983 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduction to regression models; Assessing nonlinearity in nonlinear regression models; Yield-density models; Sigmoidal growth models; Asymptotic regression model; Some miscellaneous models; Comparing parameter estimates from more than one data set; Obtaining good initial parameter estimates; Summary: towatd a unified approach to nonlinear regression modeling.
Book Synopsis Forest Biodiversity in North, Central and South America, and the Caribbean: Research and Monitoring by : J.A. Comiskey
Download or read book Forest Biodiversity in North, Central and South America, and the Caribbean: Research and Monitoring written by J.A. Comiskey and published by CRC Press. This book was released on 1998-11-15 with total page 798 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the second of two high-level, data-rich volumes from the massive Smithsonian/MAB Biological Diversity Program documenting the latest findings on forest biodiversity. In original contributions, some three hundred scientists from over forty countries discuss socioeconomic aspects, ecological monitoring and assessment, forest dynamics, growth trends, dry forests, species richness of woody regeneration and of vascular plants, hurricane impact, tropical cloud forests, Landsat-TM satellite mapping, and quantitative ethnobotany. The book covers first the research and monitoring methodologies for the New World and then the results of individual research and integrated studies on all aspects of forest biodiversity in North and South America and the Caribbean.
Download or read book Popular Mechanics written by and published by . This book was released on 1964-04 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: Popular Mechanics inspires, instructs and influences readers to help them master the modern world. Whether it’s practical DIY home-improvement tips, gadgets and digital technology, information on the newest cars or the latest breakthroughs in science -- PM is the ultimate guide to our high-tech lifestyle.
Book Synopsis Forest Growth and Yield Modeling by : Aaron R. Weiskittel
Download or read book Forest Growth and Yield Modeling written by Aaron R. Weiskittel and published by John Wiley & Sons. This book was released on 2011-07-15 with total page 431 pages. Available in PDF, EPUB and Kindle. Book excerpt: Forest Growth and Yield Modeling synthesizes current scientific literature and provides insights in how models are constructed. Giving suggestions for future developments, and outlining keys for successful implementation of models the book provides a thorough and up-to-date, single source reference for students, researchers and practitioners requiring a current digest of research and methods in the field. The book describes current modelling approaches for predicting forest growth and yield and explores the components that comprise the various modelling approaches. It provides the reader with the tools for evaluating and calibrating growth and yield models and outlines the steps necessary for developing a forest growth and yield model. Single source reference providing an evaluation and synthesis of current scientific literature Detailed descriptions of example models Covers statistical techniques used in forest model construction Accessible, reader-friendly style
Book Synopsis Fire Ecology of Pacific Northwest Forests by : James K Agee
Download or read book Fire Ecology of Pacific Northwest Forests written by James K Agee and published by Island Press. This book was released on 1996-03-01 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The structure of most virgin forests in the western United States reflects a past disturbance history that includes forest fire. James K. Agee, an expert in the emergent field of fire ecology, analyzes the ecological role of fire in the creation and maintenance of natural western forests, focusing primarily on forest stand development patterns. His discussion of the natural fire environment and the environmental effects of fire is applicable to a wide range of temperate forests.
Book Synopsis Size- and Age-Related Changes in Tree Structure and Function by : Frederick C. Meinzer
Download or read book Size- and Age-Related Changes in Tree Structure and Function written by Frederick C. Meinzer and published by Springer Science & Business Media. This book was released on 2011-06-29 with total page 511 pages. Available in PDF, EPUB and Kindle. Book excerpt: Millions of trees live and grow all around us, and we all recognize the vital role they play in the world’s ecosystems. Publicity campaigns exhort us to plant yet more. Yet until recently comparatively little was known about the root causes of the physical changes that attend their growth. Since trees typically increase in size by three to four orders of magnitude in their journey to maturity, this gap in our knowledge has been a crucial issue to address. Here at last is a synthesis of the current state of our knowledge about both the causes and consequences of ontogenetic changes in key features of tree structure and function. During their ontogeny, trees undergo numerous changes in their physiological function, the structure and mechanical properties of their wood, and overall architecture and allometry. This book examines the central interplay between these changes and tree size and age. It also explores the impact these changes can have, at the level of the individual tree, on the emerging characteristics of forest ecosystems at various stages of their development. The analysis offers an explanation for the importance of discriminating between the varied physical properties arising from the nexus of size and age, as well as highlighting the implications these ontogenetic changes have for commercial forestry and climate change. This important and timely summation of our knowledge base in this area, written by highly respected researchers, will be of huge interest, not only to researchers, but also to forest managers and silviculturists.
Book Synopsis The Principles of Forest Yield Study by : Ernst Assmann
Download or read book The Principles of Forest Yield Study written by Ernst Assmann and published by Elsevier. This book was released on 2013-10-22 with total page 521 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Principles of Forest Yield Study: Studies in the Organic Production, Structure, Increment and Yield of Forest Stands reviews the progress that has been made in the field of forest yield studies, especially those concerning the organic production, structure, increment, and yield of forest stands. Topics covered include woody growth as part of the total produce of plant societies; growth and form of forest trees; constitution and development of stands; and forest stand structure, increment, and yield in relation to silvicultural treatment. This book is divided into five sections and begins with an overview of the history of forest yield studies, as well as the place of forest yield theory in forest science. Research objectives and methods employed in forest yield studies are outlined. The discussion then turns to the interactions between soil, climate and plant production; the social structure of tree crops; growth performance of tree crops in relation to site; and disturbances in the normal trend of increment. The use of fertilizers for amelioration and treatment of forest soils are discussed from the standpoint of yield studies. This monograph will be a useful resource for practitioners in forestry, the natural sciences, plant physiology, soil science, and meteorology.
Book Synopsis Forests of Western Oregon by : Sally J. Campbell
Download or read book Forests of Western Oregon written by Sally J. Campbell and published by . This book was released on 2002 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
