Growth and yield records from well-stocked stands of Douglas-fir

a summary of data and analyses resulting from the oldest permanent growth plots in the Pacific Northwest by Richard L. Williamson

Publisher: Pacific Northwest Forest and Range Experiment Station, Forest Service, U.S. Dept. of Agriculture in Portland, Or

Written in English
Published: Pages: 24 Downloads: 343
Share This

Subjects:

  • Douglas fir -- Northwest, Pacific -- Statistics

Edition Notes

Bibliography: p. 23-24.

Statementby R.L. Williamson.
GenreStatistics.
SeriesResearch paper PNW -- 4., U.S. Forest Service research paper PNW -- 4.
The Physical Object
Pagination24 p. :
Number of Pages24
ID Numbers
Open LibraryOL17616215M
OCLC/WorldCa26827836

  Over time, stand density reduction in Norway spruce (Picea abies (L.) Karst.) (a) reduces total yield degressively and increases dominat diameter propressively, (b) reduces total yield less through thinning from above than through thinning from below, (c) reduces total yield more severely on rich compared to poor sites (SI 45 vs. SI 25), (d) accelerates dominant diameter more on rich . Data from acre plots in these plantations were compared to those from matched plots in adjacent, naturally regenerated stands with the same history of logging, wildfire, and absence of further siviculture after regeneration. Planting resulted in well-stocked Douglas-fir stands . Franco) stands, and years old, we conclude that managed stands can meet established criteria for old-growth Douglas-fir and simultaneously produce near-maximum yields of good-quality timber. Description. Coast Douglas-fir is the second-tallest conifer in the world (after coast redwood), and the third-tallest of all trees, (after Eucalyptus regnans).Currently, coast Douglas-fir trees 60–75 metres (– ft) or more in height and –2 metres (– ft) in diameter are common in old growth stands, and maximum heights of – metres (– ft) and diameters up to.

To age 40 thinnings in this low site I Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) stand resulted in large increases in diameter growth with reductions in basal area and volume growth and yield. Growth was strongly related to the level of growing stock. This report updates data and comparisons from previous reports (Curtis and others , Curtis ) on a series of precommercial thinning and yield trials in high-elevation true fir-hemlock stands, using data from the 12 replicates for which year data are now available. The stands were varying mixtures of Pacific silver fir (Abies amabilis (Douglas ex Loudon) Douglas ex Forbes), western. Seasonal progress of radial growth of Douglas-fir, western redcedar and red alder Item Preview Full catalog record MARCXML. This book is available with additional data at Biodiversity Heritage Library. plus-circle Add Review. comment. This internal structure was also derived from the first sampling methods have been applied to nine old-growth Douglas fir trees (Pseudotsugamenziesii (Mirb.) Franco). Franco). Data from a single year-old tree ( m dbh, 77 m in height) in the H. J. Andrews Experimental Forest in the western Cascade Mountains of Oregon are.

An illustration of an open book. Books. An illustration of two cells of a film strip. Effect of operational fertilization on foliar nutrient content and growth of young douglas-fir and Pacific silver fir. by Cochran, P. H Growth and yield of well-stocked white spruce stands in Alaska. by. Filed under: Douglas fir. Douglas fir use book. (Seattle, Wash.: West Coast Lumbermen's Association, ), by West Coast Lumbermen's Association (page images at HathiTrust; US access only) Die Douglas-Fichte und einige andere Nadelhölzer namentlich aus dem nordwest- lichen Amerika in Bezug auf ihren forstlichen Anbau in Deutschland. management plans for their 2nd and 3rd growth redwood and Douglas-fir stands. Looking for new adventures and challenges, Dan retired from Green Diamond, moved to Redding and started his own consulting business where he assists timberland owners with their forest inventories, management plans, and timberland appraisals. and Neskowin, Oregon) to get a continuous growth record of a typical well-stocked stand, Every tree was numbered, tagged, its diameter taken with steel tape, and the heights measured of about 40 trees per acre. In the trees were remeasured and the results were astonishing. Again this past fall. I remeasured them with the good help of five men.

Growth and yield records from well-stocked stands of Douglas-fir by Richard L. Williamson Download PDF EPUB FB2

Systematic research on growth and yield of Douglas-fir began in This line of early research evolved over time and culminated in publication of USDA BulletinThe Yield of Douglas-fir in the Pacific Northwest.

B had an enormous influence on development of Douglas-fir forestry and was. for even-aged stands: (1) normal yield tables for thinned stands.

(2) normal yield tables for unthinned stands, and (3) empirical yield tables. At the time there were no thinned stands in North America, and in North American usage the term “normal yield table” came to mean a table for natural well-stocked unthinned stands by: 1. Opportunity to study the yield of young Douglas fir forests was abundantly afforded by the many areas where such forests of various ages and OIl various types of land have originated naturally after logging or following severe fires that killed the tbrmer stands.

Many of these young forests are so uniform and well stocked that they are. (LOGS) in Douglas-fir. The technique used reduces the seven curves for each treatment for each variable of interest to Growth and yield records from well-stocked stands of Douglas-fir book single set of readily interpretable mean curves.

To a top height of ft and corresponding average age of 45 years, volume growth and yield are strongly related to stocking level, being highest at the highest stocking levels. Growth and yield of well-stocked white spruce stands in Alaska Item Preview remove-circle Growth and yield of well-stocked white spruce stands in Alaska by Farr, This book is available with additional data at Biodiversity Heritage Library.

Presents yield tables for well stocked, even-aged stands of Populus tremuloides and Betula papyrifera in interior Alaska. Both are short-lived pioneer upland species, but they have different physiographic requirements and seldom occur together. KEYWORDS: Betula papyrifera \ increment \ Pioneer species \ Populus tremuloides \ increment \ yield tables.

Keywords: Growth and yield, mean annual increment, rotation, Douglas-fir, Pseudotsuga menziesii, alternative silviculture, ecosystem management. Trends of mean annual increment and periodic annual increment were examined in 17 long-term thinning studies in Douglas-fir.

Stands with Douglas-fir trees over l years old are occasionally encountered, however (Hemstrom and Franklin ). Senescence may appear in some old-gowth forests, although it appears that old-growth stands of Douglas-fir typically remain intact for to years.

On the other hand, some stands may break up at years, while others. Williamson, R. () “Growth and Yield Records From Well-Stocked Stands of Douglas-Fir.” U.S.D.A. Forest Service, Pacific Northwest Forest and Range Experiment Station, Research paper PNW Dahms, W.

() “Gross and Net Yield Tables for Lodgepole Pine.”. All 20 of the stands examined were originally established as permanent plots to provide reliable estimates of timber volume growth of natural, young, well-stocked stands of pure P. menziesii (Williamson, ).Researchers from the Pacific Northwest Forest and Range Experiment Station established the plots between and in what are now the Mt.

Hood, Siuslaw, Willamette. Growth and yield records from well-stocked stands of Douglas-fir: a summary of data and analyses resulting from the oldest permanent growth plots in the Pacific Northwest. [Richard L Williamson; Pacific Northwest Forest and Range Experiment Station (Portland, Or.)].

Northwest Douglas-Fir: Estimates from Growth-and-Yield Models • David D. Marshall and Eric C. Turnblom Wih increses n havest of forests ment of forest management n.

he Paciic ; ields at age 45 for a well-stocked nat­ in.e Paciic during Nohwst hs been research demonstrating ural stand or a plantaion (begun by plnting. Development of old-growth structure and timber volume growth trends in maturing Douglas-fir stands S.A. Acker), T.E.

Sabin, L.M. Ganio, We examined long-term records up to 82 estimates of timber volume growth of natural, young, well-stocked stands of pure P. menziesii William-son, Researchers from the Pacific Northwest. Growth characteristics of the forest 6 Trend of understocked stands toward Growth characteristics of the tree 7 normality 33 Factors influencing yield of Douglas fir 8 Methods of conducting yield surveys_____ 33 Site quality 8 Field work 34 Stocking 9 Office work 35 Growth and yield tables 10 Additional considerations Growth and yield of well-stocked aspen and birch stands in Alaska Growth and yield of well-stocked aspen and birch stands in Alaska by Gregory, Robert A; Haack, Full catalog record MARCXML.

plus-circle Add Review. comment. Reviews There are no reviews yet. Selection of these ecological variables is based on the physical structure and species composition of late-successional or “old-growth” Douglas-fir stands (Franklin et al., ). Each of these ecological measures typically increases during long-term stand development following natural, stand-replacing disturbances (Spies and Franklin, ).

The mathematical model developed here satisfactorily describes the growth of Douglas-fir stands on an individual tree basis for a wide range of stand conditions and management schedules.

Basic Data The normal-yield tables for Douglas fir are based on sample plots scattered through the geographical range of the species in California. i Assistant Professor of Forestry and Assistant Forester in the Experiment Station. 2 McArdle, R. Rates of growth of Douglas fir forests. West Coast Lumberman,Figure 2- Douglas-fir leaves and cones.

dense stands is often improved by pre-commercial and commercial thinning. In unmanaged stands on the best sites, yields of 20, cubic feet (, board feet, Scribner rule) per acre can be achieved in years, but on aver-age sites, even old-growth stands rarely contain more t cubic feet.

Site classification by stand height has its origins in plantation-like regular forests with good management records and in even-aged, single species, well-stocked stands of known age.

However, it is also used for more complex or irregular forest types, with or without past management history or records (Vanclay and Henry, ; Vanclay, ). Staebler, G.R. Gross yield and mortality tables for fully stocked stands of Douglas- fir.

Research Paper USDA Forest Service, Pacific Northwest Forest and Range Experiment Station, Portland, OR. Williamson, R.L. Growth and yield records from well-stocked stands of Douglas- fir.

Studies on moist sites in northwestern Oregon have shown that large trees in old-growth stands grew much more rapidly at young ages than trees in young stands on similar sites (Tappeiner et al., ).Rapid early growth was an important characteristic of large old-growth trees (Poage and Tappeiner, ).Also, tree ages in old-growth stands were much more variable than those in young stands.

Chapter 7 (Page no: 75) A strategy for growth and yield research in pine and eucalypt plantations in Komatiland Forests in South Africa. In Komatiland Forests (South Africa) the objectives of growth and yield research are to develop a range of empirical stand-level growth and yield models for thinned pine stands.

Managed stand yield tables for coastal Douglas-fir by Kenneth J. Mitchell,Information Services Branch, Ministry of Forests edition, in English. The relationship between current stand structure, tree mortality, tree size and varying mixtures of species proportions were examined in this study.

Treatments included four proportions of red alder either planted simultaneously with the Douglas-fir or delayed 5-years after initial Douglas-fir planting.

We used the growth-and-yield model Table Interpolation Program for Stand Yields (TIPSY) to simulate the growth of high-density stands of Douglas-fir and western hemlock. This chapter reviews the general procedures and methodologies used for validating growth and yield models.

More specifically, it addresses: (i) the optimism principle and model validation; (ii) model validation procedures, problems and potential areas of needed research; (iii) data considerations and data-splitting schemes in model validation. A yield table is a tabular record illustrating the expected volume of wood using a combination of measurable stand characteristics such as age, site quality, and stand density (Palahí et al., ).

When presented, a yield table illustrates the amount of wood that would be available per unit area from a stand of trees at a given age.

overstory of Douglas-fir, contained 3, and 3, cubic feet per acre, respectively (table 2), Yield of the untreated pure alder stand is probably representative of natural stands in the study locality.

However, dissimilar growing conditions caused by complete absence of Douglas-fir overstory precludes comparison of growth rates with. Spacing tests begun in at the Wind River Douglas-fir plantation by the Pacific Northwest Forest and Range Experiment Station with seedlingsare the oldest tests in the Pacific Northwest.

They show trends in stand growth and development for spacings of 4 x 4, 5 x 5, 6 x 6, 8 x 8, 10 x 10, and 12 x 12 feet. Table 1 is a summary of that. 1. At age 30 to 40, a well stocked Douglas-fir stand has just entered its period of greatest annual volume growth.

The risk of animal damage and brush competition is past. Most of the site’s productive resources are now concentrated in growing wood.

Typical stands will continue to sustain this high growth rate for another 30 to 40 years. 2.Combine the results to obtain total stand growth and yield.

• If you have a distinct smaller area (1 to 3 acres) with poor stocking in a larger well-stocked area, exclude the smaller area from your sample and volume estimate and measure it separately.residual stands to which normal yield tables for even-aged timber Nearly all of the sampled stands included Douglas-fir trees growing in mixture with the ponderosa pine ; Douglas-fir averaged reserve, therefore, grow faster than trees in relatively well- stocked, heavy reserve stands.

The trend of periodic growth by.