Pioneer exotic tree search for the douglas-fir region. Forest Service general technical report

Technical Report · Sun Mar 01 00:00:00 EST 1992

OSTI ID:6729264

Silen, R R; Olson, D L

After three-quarters of a century of introduction of 152 conifer and broadleaf species, no promising candidate exotic was found for the Douglas-fir region. Growth curves spanning 50 years or longer are figured for many species. Firs, pines, larches, spruces, hemlocks, and cedars orginating in northwestern North America had superior growth rates to those from other forest regions. The probable basis for these differences is discussed. The record highlights a general failure of introduced hardwoods, the slow decline of most introduced conifers, the long time needed to express failures, dramatic effects of climatic extremes or introduced pests, failure of native species of continental origin at Wind River, striking similarities of growth rate for the species originating in each country, and many important contrasts between results from early reports and long-term conclusions.

• Research Organization: Forest Service, Portland, OR (United States). Pacific Northwest Research Station
• OSTI ID: 6729264
• Report Number(s): PB-93-142479/XAB; FSGTR-PNW-298
• Resource Relation: Other Information: Portions of this document are not fully legible
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
54 ENVIRONMENTAL SCIENCES
SILVICULTURE
RESEARCH PROGRAMS
US FOREST SERVICE
BIOMASS
CEDARS
CLIMATIC CHANGE
CONIFERS
FAILURE MODE ANALYSIS
FAILURES
FIRS
FORESTRY
FORESTS
GENETICS
GROWTH
HEMLOCKS
IMAGES
LARCHES
NORTH AMERICA
ORIGIN
PACIFIC OCEAN
PINES
PLANTS
SEEDS
SPRUCES
TREES
USA
WIND
AGRICULTURE
BIOLOGY
DEVELOPED COUNTRIES
ENERGY SOURCES
NATIONAL ORGANIZATIONS
PINOPHYTA
RENEWABLE ENERGY SOURCES
SEAS
SURFACE WATERS
SYSTEM FAILURE ANALYSIS
SYSTEMS ANALYSIS
US DOA
US ORGANIZATIONS
090700* - Biomass Fuels- Resources- (1990-)
540210 - Environment
Terrestrial- Basic Studies- (1990-)