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Saturday, October 31, 2020 | History

3 edition of growth intercept model for coastal Douglas-fir found in the catalog.

growth intercept model for coastal Douglas-fir

Gordon Donald Nigh

growth intercept model for coastal Douglas-fir

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  • 12 Currently reading

Published by British Columbia, Ministry of Forests Research Program in Victoria .
Written in English

    Places:
  • British Columbia,
  • British Columbia.,
  • Colombie-Britannique,
  • Colombie-Britannique.
    • Subjects:
    • Douglas fir -- British Columbia -- Growth -- Mathematical models.,
    • Douglas fir -- Yields -- British Columbia.,
    • Site index (Forestry) -- British Columbia.,
    • Sapin de Douglas -- Colombie-Britannique -- Croissance -- Modèles mathématiques.,
    • Sapin de Douglas -- Rendement -- Colombie-Britannique.,
    • Indice de station (Sylviculture) -- Colombie-Britannique.

    • Edition Notes

      Includes bibliographical references (p. 19-20).

      StatementGordon D. Nigh.
      SeriesResearch report ;, 10, Research report (British Columbia. Ministry of Forests. Research Branch) ;, 10.
      ContributionsBritish Columbia. Ministry of Forests. Research Branch.
      Classifications
      LC ClassificationsSD397.D7 N54 1997
      The Physical Object
      Paginationiv, 20 p. ;
      Number of Pages20
      ID Numbers
      Open LibraryOL447099M
      ISBN 100772631492
      LC Control Number98160553
      OCLC/WorldCa36993195

      "Clearly, Managing Growth in America's Communities is a serious attempt to give some order to the bewildering diversity of stuff described as 'growth management.'", Planning "This book is a valuable text on techniques of growth management. It is a more valuable guide to decision makers about the importance of openness and creativity."Cited by:   Geographic variation in Douglas fir from the coastal ranges of California. II. Predictive value of a regression model for seedling growth variation. Silvae Genetica 96– Griffin AR, Ching KK. Geographic variation in Douglas fir from the coastal ranges of California. I. Seed, seedling growth and hardiness by: In this user-friendly book, Olivier de la Grandville provides a fascinating introduction to the theory of economic growth and shows how many results from this field are of paramount importance for society. The classical mechanics of the growth process are carefully explained, with two chapters devoted to the fundamental issue of the 5/5(1).


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growth intercept model for coastal Douglas-fir by Gordon Donald Nigh Download PDF EPUB FB2

This research develops a growth intercept model for coastal Douglas-fir. Forty-eight stem analysis plots were located in the Coastal Western Hemlock and Coastal Douglas-fir biogeoclimatic zones of British Columbia. Three Douglas-fir trees in each plot were selected for intensive sampling.

These growth intercept model for coastal Douglas-fir book. This research develops a growth intercept model for coastal Douglas-fir. Forty-eight stem analysis plots were located in the Coastal Western Hemlock and Coastal Douglas-Fir biogeoclimatic zones of British Columbia.

Three Douglas-fir trees in each plot were selected for intensive sampling. Quebec,a need existed for growth intercept models for these species. The only available growth intercept models have been developed in British Columbia for coastal Douglas-fir (Pseudotsuga menziesii[Mirb.] Franco sii;Nigh Growth intercept models for black spruce, jack pine and balsam fir in Quebec by Daniel Mailly1,2 and Mélanie Gaudreault1.

This field guide insert presents the growth intercept models and tables available for use in the interior of British Columbia. Included are growth intercept models and tables for: Lodgepole Pine, Interior Spruce, Douglas-fir, Western Hemlock, Subalpine Fir, Western Redcedar, and Western Larch.

Included are growth intercept models and tables for: Western Hemlock, Sitka Spruce, and Douglas-fir. The Options section notes any options and alternative models or model formulations, and provides references that are available from the above address. The tables are designed for rough estimation of site index in the field.

impede the recovery of old-growth characteristics (O'Hara et al. Teraoka and Keyes ). Second-growth stands are commonly comprised of dense, even-aged Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) and redwood stump sprouts, with Author: Phillip J.

van Mantgem, Jason R. Teraoka, David H. LaFever, Laura B. Lalemand. The primary objective of this study was to develop a model for Douglas-fir height growth for application in an individual tree, distance-independent growth model (Munro, ). A secondary objective was to evaluate different model forms and measures of competition and position for their ability to characterize height growth of by: For the coastal variety of Douglas‐fir, we found positive correlations of ring width with summer precipitation and temperature of the preceding winter, indicating that growth of coastal populations was limited by summer dryness and that photosynthesis in winter contributed to by: Graduation date: A mathematical model has been developed to describe the growth of individual Douglas-fir trees under a variety of stand conditions and management schedules.

Fertilizer response and percent response after two years were examined, according to mapped and measured biogeoclimatic variables, for 71 Douglas-fir installations in the coastal Pacific Northwest.

Paired-tree installations consisted of 12–20 pairs of Douglas-fir trees with one tree fertilized with urea at kg Nha − by: 7. This analysis uses “breast height age ” to determine a “growth intercept ” that is then used to calculate a site index for each sample of browsed and unbrowsed trees.

The site index (height at BHA=50) was calculated for samples of browsed and unbrowsed within each plot using a growth intercept model for coastal Douglas-Fir developed by Gordan Nigh for the BC Ministry of Forests Research Program.

Comparison of height growth and growth intercept models of jack pine plantations and natural stands in northern Ontario. A growth intercept for coastal Douglas fir. B.C. our old-growth coastal Douglas-fir forests.

Another modern threat to these forests is the suppression of natural forest fires. Mature Douglas-fir trees have thick bark, which protects them from the low-intensi-ty fires that used to occur here about every to fires maintained the dominance of Douglas-fir by controllingFile Size: KB.

This analysis uses “breast height age ” to determine a “growth intercept ” that is then used to calculate a site index for each sample of browsed and unbrowsed trees.

The site index (height at BHA=50) was calculated for samples of browsed and unbrowsed within each plot using a growth intercept model for coastal Douglas-Fir developed by. A Height Growth Model and Associated Growth Intercept Models for Estimating Site Index in Black Spruce (Picea mariana Mill.

B.S.P.) Plantations in Northern Ontario, Canada. Thinning treatments are an important management tool, as they help reduce competition and promote tree growth by increasing available resources in a stand (e.g., light, water, etc.).

Thinning leads to differences in stand composition and structure, and this variation has been linked to forest productivity. Previous research has found that tree growth can be improved in some mixed species Author: Grace Carsky. A height-growth and site-index model for interior spruce in the Sub-Boreal Spruce biogeoclimatic zone of British Columbia Zhengjun Hu, a Oscar García a a University of Northern British Columbia, University Way, Prince George, BC V2N 4Z9, by: 9.

Growth reaction patterns of tree height, diameter, and volume of Douglas-fir (Pseudotsuga menziesii [Mirb.] Franco) under acute drought stress in Southern Germany. A conceptual model of branch growth in old coastal Douglas-fir.

A branch is expected to grow following the maximum diameter–length relationship until damage or die-back occurs.

This modifies the branch diameter–length relationship, making the branch shorter than expected for its by: Interior and coastal Douglas-fir provenances have been Treatment, Provenance + Treatment and Provenance × Treatment were compared with a null model considering only an intercept and Sampling day as a variation in seedling water-use efficiency as estimated by carbon isotope ratios and its relationship to sapling growth in : Laura Verena Junker-Frohn, Anita Kleiber, Kirstin Jansen, Arthur Gessler, Jürgen Kreuzwieser, Ingo E.

Interior douglas-fir growth intercept models Gordon D. Nigh. J M5 Trends in growth intercept estimates of Fdc site index in post-harvest regenerated stands on southern Vancouver Island: phase III: analysis of random sample data / J.S.

Thrower & Associates Ltd. viii • How to Determine Site Index in Silviculture Course Schedule Classroom Session Course and Participants Introduction Introduction to Site Index (SI) Overview of Methods for Estimating SI BEC Method Growth Intercept Method Break Advanced Options for Growth Intercept Site Index Curve Method.

We compared crown structure among, and year-old Douglas-fir (Pseudotsuga menziesii Mirb.(Franco) var. menziesii) trees, and present a conceptual model of crown model is based on the idea that the tree crown can be considered a vertical chronosequence of cohorts of branches that increase in age from upper- to by: Impact of Swiss Needle-Cast on Growth of Douglas-Fir Article (PDF Available) in Phytopathology (5) October with 86 Reads How we measure 'reads'.

Annualized diameter and height growth equations for Pacific Northwest plantation-grown Douglas-fir, western hemlock, and red alder Aaron R. Weiskittela3*, Sean M. Garber a, Gregory P. Johnson b, Douglas A.

Maguire a, Robert A. Monserud a Department of Forest Science. Oregon State Universify, Corvallis, ORUnited StatesCited by: volume growth has been the highest priority in most tree improvement programs.

Early selection for rota - tion-age stem volume is often conducted based on juve - nile height growth (e.g., MCKEAND, ; DEAN and Early Selection for Improving Volume Growth in Coastal Douglas-fir Breeding Programs By T. YE*) and K.

JAYAWICKRAMA. Results The following equations were found to maximize the Radi for the models described above: Models DFDI and WHDI: Table 2 Parameter information for Douglas-fir basal area growth models Model Coefficient Variable Value VIF Partial r2 DFDI bo intercept N/A N/A b, DBH b2 DBH-ABAH b3 DBH - CC -0 Cited by: Thirty-two full-sib families of coastal Douglas-fir (Pseudotsuga menziesii (Mirb.)Franco var.

menziesii) with a range of predicted breeding values were monitored for growth rate, phenology, and cold hardiness over 2 years on two sites to investigate if other traits are being selected when family selection is based on icant differences among families existed in most phenological Cited by: SAMPLING HEIGHTS OF SECOND GROWTH COASTAL DOUGLAS-FIR INFIXED AREA PLOTSbyWilliam G.

University of British Columbia A THESIS SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTSFOR THE DEGREE OF MASTER OF FORESTRYinFACULTY OF GRADUATE STUDIESDepartment of Forestry (Forest Management)We accept this thesis as. Douglas-fir growth in the Pacific Northwest is thought to be water limited.

However, discerning the relative influence of air temperature and plant available soil water (W) on growth is difficult because they interact with each other, with other climate factors and with the inherent seasonal timing of cambial s-fir growth response to air temperature and W patterns during the Cited by: Despite widespread operational application, knowledge on the impact of late-rotation fertilization on forests, especially fibre properties, is lacking.

In this study, we evaluate the growth response and fibre properties following nitrogen fertilization in a productive second-growth coastal Douglas-fir Cited by: 6. growth, yield table, site index. A ll older coastal Douglas-fir foresters are well acquainted with The Yield of Douglas-fir in the Pacific Northwest (McArdle et al.

), often referred to simply as “Bulletin ” Some younger foresters and those from east of the Cascades may be aware only that it exists. Yet, B was perhaps the most. between different subzones.

For example, Douglas-fir site index shows a reasonably positive relationship with increasing precipitation in the selected sequence of Coastal Douglas-fir (CDF) and Coastal Western Hemlock (CWH) biogeoclimatic units; however, the relationship to the selected temperature variables is not as strong (see Table 1).

Measurements on growth traits up to 41 years of age from 68 progeny sites in eight first-generation breeding zones of coastal Douglas-fir (Pseudotsuga menziesii [MIRB.] FRANCO var. menziesii) in the US Pacific Northwest were used to investigate age trends of genetic parameters and to determine optimum age of by: 5.

Most old growth Douglas-fir (Pseudotsuga menziesii) range in height from to feet, and have a diameter of 5 to 8 feet. The oldest known Douglas-fir (Pseudotsuga menziesii) can be found on Vancouver Island in British Columbia, and is estimated to be between to years old (Earle ).

Second-Growth Douglas-fir. Photo by author. This has aptly been demonstrated for a variety of cold-hardiness and growth-related phenotypes in coastal Douglas fir.

Similar trends for the molecular genetic variation underlying these traits have been identified here, with most SNP genotypes tracking variation along the same gradient as their associated phenotypes (Figure 3).Cited by:   Effects of silviculture and genetics on branch/knot attributes of Coastal Pacific Northwest Douglas-fir and implications for wood quality-A synthesis.

Forests 5(7): Maguire, D. Branch mortality and potential litterfall from Douglas fir trees in stands of varying density. Forest Ecol. Manag. 70(1) Site preparation is used to favor seedling regeneration and establishment by enhancing growing conditions and increasing resource availability, yet few studies have compared different site preparation techniques on growth and yield of trees over multiple decades.

We destructively sampled year old trees of western white pine (Pinus monticola Douglas ex D. Don) and Interior Douglas-fir. A new nonlinear regression model for constructing site index curves is described that, unlike previous models based on the Chapman–Richards growth model, produces sets of curves that are constrained to pass through the appropriate height at the index age as well as through the by: FORECAST is a management-oriented, stand-level, forest-growth and ecosystem-dynamics model.

The model was designed to accommodate a wide variety of silvicultural and harvesting systems and natural disturbance events (e.g., fire, wind, insect epidemics) in order to compare and contrast their effect on forest productivity, stand dynamics, and a series of biophysical indicators of non-timber values.

Douglas-fir comprises 6% of New Zealand’s planted forest area and contributes to the national carbon sequestration estimate. Carbon stock changes in Douglas-fir stem wood can be calculated by multiplying the increment in stem volume under bark by the density of the growth sheath and the carbon fraction.

This paper describes a new model developed to predict variation in wood Cited by: 2.Annualized diameter and height growth equations for Pacific Northwest plantation-grown Douglas-fir, western hemlock, and red alder Aaron R. Weiskittela,*, Sean M. Garbera, Gregory P. Johnsonb, Douglas A. Maguirea, Robert A.

Monserudc a Department of Forest Science, Oregon State University, Corvallis, ORUnited States bWeyerhaeuser Company, P.O.

BoxFederal Way, WAUnited.Widening economic inequalities across the globe today can be understood as the historical consequences of different drivers of growth. This important new text examines the proximate factors of labour, capital and productivity across a range of countries, as well as deeper explanations, from geographical and cultural factors, to colonialism, institutions and the openness of markets and by: 1.