与 «WHITE SPRUCE»相关的英语书籍
在以下的参考文献中发现
white spruce的用法。与
white spruce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
Albino seedlings of
white spruce
Nienstaedt-i-' and Fowler-2/ both observed chlorophyll deficiency after selfing
white spruce, but neither has yet published his data. This Note reports albinism
among seedlings from a wild source of open-pollinated white spruce seed in
Alaska.
John C. Zasada, Lawson L. Winton, 1970
2
Distribution and causes of canopy gaps in
white spruce in ...
Spruce mortality, the cause of canopy gaps, is the most serious disorder of white
spruce (Picea glauca (Moench) Voss) in the Black Hills of South Dakota. Surveys
conducted in 1990 and 1991 showed that this disorder is associated with a ...
J. E. Lundquist, Rocky Mountain Forest and Range Experiment Station (Fort Collins, Colo.), 1993
3
White spruce cone and seed production in interior Alaska, ...
CONCLUSIONS Although these data are limited, they do provide some useful
information concerning cone and seed production in white spruce stands of
interior Alaska. Using this information, we can make several general statements.
John C. Zasada, Leslie A. Viereck, Pacific Northwest Forest and Range Experiment Station (Portland, Or.), 1970
4
Key to adult bark beetles commonly associated with
white ...
PNW-189 September 1972 KEY TO ADULT BARK BEETLES COMMONLY
ASSOCIATED WITH WHITE SPRUCE STANDS IN INTERIOR ALASKA by Roy C.
Beckwith, Prinoipal Entomologist ABSTRACT A dichotomous key enables the ...
5
Volume tables and equations for
white spruce, balsam poplar, ...
USDA FOREST SERVICE RESEARCH NOTE PNW-147 April 1971 VOLUME
TABLES AND EQUATIONS FOR WHITE SPRUCE, BALSAM POPLAR, AND
PAPER BIRCH OF THE KUSKOKWIM RIVER VALLEY, ALASKA by RONALD M.
Ronald M. Dippold, W. A. Farr, 1971
6
Growth of ponderosa pine,
white spruce, and blue
spruce ...
were used, two from Valentine, Nebraska, and two from Ruidoso, New Mexico.
White spruce (Picea glauca (Moench) Voss) and blue spruce (Picea pungens
Engelm.) seeds were obtained in mixed lots from North Dakota State Nursery and
...
R. W. Tinus, Rocky Mountain Forest and Range Experiment Station (Fort Collins, Colo.), 1971
7
Susceptibility of 10
spruce species and hybrids to the
white ...
This is a horticultural hybrid of Sitka spruce and white spruce with a backcross to
white spruce. The 26 surviving trees were attacked several times by the weevil;
but all attacks were aborted by heavy pitching, indicating natural resistance to ...
R. G. Mitchell, Kenneth H. Wright, Norman E. Johnson, 1974
I Paper birch — Black spruce- Slight IModerate i Moderate I Slight 'Moderate i i i i
White spruce- Paper birch- Black spruce- White spruce — Quaking aspen- Paper
birch 83 65 60 83 65 60 87 65 I 60 I 83 57 50 83 57 50 White spruce.
United States. Bureau of Soils, United States. Bureau of Plant Industry, United States. Soil Conservation Service, 1980
Moderate- Slight Potential productivity Important trees Northern red oak- Eastern
white pine- Red Bpruce Red pine White spn ti fir Balsam 1 Red spruce- Northern
red oak- Eastern white pine- Red spruce Red pine White spruce Balsam fir Red ...
United States Bureau of Chemistry and Soils, United States. Bureau of Plant Industry, United States. Bureau of Plant Industry, Soils, and Agricultural Engineering, 1978
Eastern white pine, red pine, white spruce. Eastern white pine, white spruce, red
spruce . Eastern white pine, red pine, white spruce, balsam fir. Eastern white pine
, red pine, white spruce. Eastern white pine, red pine, white spruce, balsam fir.
United States Bureau of Chemistry and Soils, United States. Bureau of Plant Industry, United States. Bureau of Plant Industry, Soils, and Agricultural Engineering, 1985
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找出国内和国际出版社所讨论的内容，以及词语
white spruce在以下新条目的上下文中是如何使用的。
Stress sets Fairbanks' white spruce up for failure
Glenn Juday, professor of forest ecology at the University of Alaska Fairbanks, says studies show a decline in white spruce forests in Interior Alaska because of ... «Fairbanks Daily News-Miner, 七月 15»
Michigan DNR Studying Damage Caused By Spruce Budworm To …
While white spruce and balsam fir are its usual victims, spruce budworms also feast on tamarack, black spruce, hemlock and pine, most especially when these ... «Tech Times, 七月 15»
Michigan DNR Begins Mapping Widespread Spruce Budworm …
Periodic budworm outbreaks are part of the natural cycle of events associated with the maturing of balsam fir and white spruce. Every 30 to 50 years, large-scale ... «AmmoLand Shooting Sports News, 七月 15»
DNR officials begin to assess budworm damage
The Michigan Department of Natural Resources has begun mapping the extent of this year's spruce budworm damage to balsam fir and white spruce in the ... «UpNorthLive.com, 六月 15»
Budworms threatening U.P. forests
The white spruce and balsam fir trees of the Upper Peninsula are facing a small, yet destructive threat. They're called spruce budworms, and they're one of the ... «UpperMichigansSource.com, 六月 15»
Widespread Spruce Budworm Defoliation Expected in Michigan
Michigan -(Ammoland.com)- Over the past few years, white spruce and balsam fir have been defoliated by the spruce budworm, one of the most destructive ... «AmmoLand Shooting Sports News, 六月 15»
Widespread spruce budworm defoliation expected in UP
MARQUETTE - Over the past few years, white spruce and balsam fir have been defoliated by the spruce budworm, one of the most destructive native insects in ... «Iron Mountain Daily News, 六月 15»
Study: Changing climate prompts boreal forest shift
(SitNews) - With warming summer temperatures across Alaska, white spruce tree growth in Interior Alaska has declined to record low levels, while the same ... «SitNews, 六月 15»
Michigan spruce, fir trees hit hard by budworm caterpillar
The spruce budworm is expected to heavily impact white spruce and balsam fir trees across the Upper and northern Lower Peninsulas this year, according to the ... «MLive.com, 六月 15»
White spruce shifting from Interior to Western Alaska, study finds
Flood plain white spruce stand along lower Yukon River late at night near the summer solstice in this 2007 photo. A new study finds that white spruce in Alaska's ... «Alaska Dispatch News, 六月 15»
