Skip to main content

Progressive Tree Improvement Program in Coastal Douglas-fir

Buy Article:

$29.50 plus tax (Refund Policy)


Since it began in 1966, the "progressive" system of tree improvement has been applied on 18 million acres of the Douglas-fir (Pseudotsuga menziesii [Mirb.] Franco) region. It departs markedly from earlier practice, needing no grafted seed orchard. Its flexibility, low cost, minimal needs for skilled personnel, and large genetic base attracted landowners who were reluctant to invest in grafted orchards, which were then beset with many problems. The early adoption of a second phase, involving crossing of all parent trees and establishment of seedling seed orchards, has accelerated the region toward widespread use of second-generation seed about 15 years earlier than originally anticipated.

Document Type: Journal Article

Affiliations: Director, Tree Improvement Laboratory, Industrial Forestry Association, Olympia, Washington

Publication date: February 1, 1979

More about this publication?
  • The Journal of Forestry is the most widely circulated scholarly forestry journal in the world. In print since 1902, the Journal has received several national awards for excellence. The mission of the Journal of Forestry is to advance the profession of forestry by keeping forest management professionals informed about significant developments and ideas in the many facets of forestry: economics, education and communication, entomology and pathology, fire, forest ecology, geospatial technologies, history, international forestry, measurements, policy, recreation, silviculture, social sciences, soils and hydrology, urban and community forestry, utilization and engineering, and wildlife management. The Journal is published bimonthly: January, March, May, July, September, and November.

    2015 Impact Factor: 1.476
    Ranking: 22 of 66 in forestry

    Also published by SAF:
    Forest Science
    Other SAF Publications
  • Submit a Paper
  • Membership Information
  • Author Guidelines
  • Ingenta Connect is not responsible for the content or availability of external websites

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
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