与 «WESTERN HEMLOCK»相关的英语书籍
在以下的参考文献中发现
western hemlock的用法。与
western hemlock相关的书籍以及同一来源的简短摘要提供其在 英语文献中的使用情境。
1
Western hemlock: Tsuga heterophylla (Raf.) Sargent
In the Idaho region the proportion of infected trees varies from 40 to 100 per cent.
Western hemlock wood, however, is reported to be immune from damage by
white ants in the Philippine Islands; if this immunity is found to exist everywhere
the ...
The relatively low market values of Engelmann spruce, Douglas-fir, western larch
, and grand fir, make extensive logging of these species unprofitable. Western
hemlock often has practically no stumpage value. Hemlock and grand fir tend to
be ...
These bark-infesting enemies are again referred to by me in the Forester, Volume
VII, October, 1901, page 251, as follows: "The Douglas Spruce bark -borer (
Asemum nitidum Lee), the Western Hemlock bark-beetle (Ilylesinus tmga: Hopk.
MS.) ...
4
Properties of
Western Hemlock and Their Relation to Uses of ...
The heartwood of dense Douglas fir, honey locust, white oak, and dense
southern yellow pine may also be classed as considerably more durable than
western hemlock, while the ashes, beech, the birches, sugar maple, the red oaks,
and the ...
Robert Pilson Albert Johnson, William Henry Gibbons, 1929
5
Gluing fire-retardant-treated Douglas-fir and
western hemlock
An evaluation is given of the effects of fire-retardants on the rate of gelation of a resorcinol-resin adhesive and on the quality of resorcinol-resin joints of treated and untreated Douglas-fir and western hemlock. (Author).
R. E. Schaeffer, Forest Products Laboratory (U.S.), 1968
6
Fuel particle diameters of
western hemlock slash
However, data on western hemlock {Tsuga heterophylla (Raf.) Sarg.) were not
available. Western hemlock quadratic and arithmetic mean diameters suitable for
use in estimating the species' volume are presented here. Table 1.- -Slash fuel ...
Collin D. Bevins, Intermountain Forest and Range Experiment Station (Ogden, Utah), United States. Forest Service, 1978
7
Development of Sirococcus shoot blight following thinning in ...
PAUL UdfrUS LIBRARIES J Abstract — ^qnt mortality from Sirococcus strobilinus
Preuss. and other causes was recorded by crown position from April 1978
through October 1979 in young- growth western hemlock [Tsuga heterophylla (
Raf.) ...
Charles Gardner Shaw, Thomas H. Laurent, Spencer Israelson, 1981
8
Silvical characteristics of
Western hemlock
Reaction to Competition, --Western hemlock is rated by- Baker as very tolerant (2
) and is placed in about the same tolerance class as Port-Orford-cedar (
Chamaecyparis lawsoniana), Pacific silver fir (Abies amabilis), and Pacific yew (
Taxus ...
Carl M. Berntsen, Pacific Northwest Forest and Range Experiment Station (Portland, Or.), 1958
9
Cubic-foot volume tables and equations for young-growth ...
The cubic-foot volume tables presented here for young-growth (less than 150
years old) western hemlock (Tsuga heterophylla (Raf.) Sarg.) and Sitka spruce {
Picea sitehensis fBong.) Carr.) supplement the tables presented in 1965 by
Embry ...
Wilbur A. Farr, Vernon J. LaBau, Pacific Northwest Forest and Range Experiment Station (Portland, Or.), 1976
10
Ripening and dispersal of a bumper
western hemlock-Sitka ...
100 z o < z □ 10 15 20 25 JULY 10 15 20 25 AUGUST 5 10 15 20 25
SEPTEMBER -L. 10 1600 1400 1200 200 5 10 15 20 25 OCTOBER Figure J. -
Ripening of western hemlock and Sitka spruce seed collected at weekly intervals,
Juneau, ...
A. S. Harris, Pacific Northwest Forest and Range Experiment Station (Portland, Or.), 1969
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Flies could avert hemlock threat in New York
Before him stood hundreds of acres of hemlock trees, all dead. ... parts to draw nutrients from eastern hemlock, western hemlock and Carolina hemlock trees. «Lake Placid News, 七月 15»
Tiny Northwest fly could save East Coast hemlock forests …
Noting that woolly adelgids in the northwest fail to devastate western hemlocks, forest service officials turned to OSU's Ross and his wife, University of Vermont ... «OregonLive.com, 六月 15»
Flies Offer Hope for Dying Hemlock Forests
Pictured: The egg sacks of a hemlock woolly adelgid on a hemlock branch, ... adelgids not just on western hemlock, but also on eastern and Carolina hemlocks. «Nature World News, 六月 15»
Root learning
Berkshire said that though many species abound, common native conifers in the Coast Range include Douglas fir (Oregon's state tree), Western hemlock and ... «Oregon Coast Today, 四月 15»
Artist and hundreds of volunteers recreate huge old-growth tree in …
Not many of us may ever come in contact with a real, live Western Hemlock, and even less of us will ever get a chance to peer into its very center. "Middle Fork" ... «Treehugger, 二月 15»
A Gigantic Sculpture Cast from the Trunk of a 140-Year-Old Hemlock …
Seattle-based artist John Grade has created a sculpture precisely shaped from the living trunk of a 140-year-old Western Hemlock tree growing in North Bend, ... «Visual News, 二月 15»
Western hemlock tolerant of living life in the shadows
Squirrels harvest the prolific cone crops of western hemlock by snipping off the ends of the branches and letting them accumulate on the forest floor. «Bonners Ferry Herald, 十一月 14»
Do you know your cones?
How many cones can you identify? Clockwise from top left: ponderosa pine, lodgepole pine, western larch, western hemlock, western red cedar, western white ... «Bonners Ferry Herald, 十月 14»
Bigger bugs to battle hemlock killers in eastern Tennessee
The beetles are a natural predator of the woolly adelgid on the West Coast, where Western hemlocks are thriving, and Womack says the beetles could be the ... «Chattanooga Times Free Press, 十月 14»
Fish Need Trees, Too
In a healthy system, the old-growth western hemlock and Sitka spruce provide a moderating influence for the stream environment; large trees along the banks ... «New York Times, 五月 14»
