Skip to main content

Seed Fall of Three Conifers in West-Central Oregon

Buy Article:

$21.50 plus tax (Refund Policy)

Seed fall of Douglas-fir, western hemlock, and western redcedar was measured with seed traps on clearcut areas in western Oregon from 1954 to 1965. During the 12 years, crops of filled seed per acre showed the following ranges: Douglas-fir 300 to 168,800, hemlock 1,000 to 178,900, and redcedar 0 to 367,400. The percentage of seed that was filled showed a direct relation to size of the annual crop for Douglas-fir and redcedar, but not for hemlock. Percentage of seed that was filled averaged 15 for Douglas-fir compared with 21 for hemlock, and 27 for redcedar. Seed fall began in late August or early September; by December, it reached 70 percent for Douglas-fir and 60 percent for hemlock and redcedar, and was virtually complete for all three species by April. Percentage of the species composition in the adjacent forest and of the total seed fall was: Douglas-fir 80 and 26, hemlock 10 and 40, and redcedar 10 and 34. Distribution of seed of the three species showed similar gradients into the clearcuts. Seed fall declined roughly in the ratio of 7 to 2 to 1 at 75, 225, and 375 feet from the timber edge.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Article Media
No Metrics

Keywords: Pseudotsuga menziesii; Thuja plicata; Tsuga heterophylla; seed distribution

Document Type: Journal Article

Affiliations: Wildlife Research Biologist, Denver Wildlife Research Center, Bureau of Sport Fisheries and Wildlife, stationed at the U.S. Forest Serv. Silviculture Laboratory in Bend, Oregon

Publication date: 1969-09-01

More about this publication?
  • Important Notice: SAF's journals are now published through partnership with the Oxford University Press. Access to archived material will be available here on the Ingenta website until March 31, 2018. For new material, please access the journals via OUP's website. Note that access via Ingenta will be permanently discontinued after March 31, 2018. Members requiring support to access SAF's journals via OUP's site should contact SAF's membership department for assistance.

    Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management.
    Forest Science is published bimonthly in February, April, June, August, October, and December.

    2016 Impact Factor: 1.782 (Rank 17/64 in forestry)

    Average time from submission to first decision: 62.5 days*
    June 1, 2016 to Feb. 28, 2017

    Also published by SAF:
    Journal of Forestry
    Other SAF Publications
  • Submit a Paper
  • Membership Information
  • Author Guidelines
  • Podcasts
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more