Timber Harvesting Systems for Forest Health
This seminar was broadcast live via the Eastern Oregon State
College Ed-Net facility on April 11, 18, 25, 1996.
John Henshaw, Past Acting manager, BMNRI, and Jimmy Roberts,
Wallowa Valley District Ranger. Careful timber harvest can
be used for improving forest health, a condition in which
productivity and ecological diversity are resilient to disturbance
and are sustainable in the long term. The primary tool for
meeting desired forest conditions is vegetation manipulation:
planting, removing, or redistributing. The key to successfully
using timber harvest as a forest health tool is planning;
attention is given to what is left on site rather than what
is removed. We need to choose options that will balance ecological
issues (soil compaction and disturbance, vegetation damage),
economic issues (current market for material removed, costs
of various removal methods), and social issues (values and
Bruce Hartsough, Professor at University of California, Davis,
CA, discusses many of the variables in choosing a harvest
system. The volume per piece and volume per acre as well as
the topography and available roads all affect the choices
of felling, yarding, bucking, loading, trucking, and milling
Loren Kellogg, Oregon State University Professor of Forest
Engineering, describes the Deerhorn Timber Sale study results.
The intent of the harvest was to reduce fuels and thin timber
in an area on Louisiana-Pacific land with severe insect damage.
Economics and effectiveness of cable yarding in combination
with a single-grip harvester were studied.
Jim McIver, Research Coordinator, BMNRI, discusses the Limber
Jim project, which will build on knowledge from the Deerhorn
study and will compare harvest methods for effectiveness of
treatment, economic feasibility, and ecological effects. There
will also be a study component that will compare public acceptance
of fuel reduction by thinning with prescribed fire.
Lynn Breese, Co-Owner Dixie Meadow Company, describes the
intensive management of their land that includes clipping
of juniper seedlings, and selective pine harvesting following
their plan to "pay the bills and leave the land better
Tom Glassford owns a 50-acre woodlot near Enterprise, and
he discusses how he uses pruning and thinning to reduce fuels,
and emphasizes selection harvest rather than production. He
has modified equipment to do his own loading and hauling.
Harold Freels, High Country Logging, describes low-impact
skidding using teams of horses. Horses cause little soil compaction
or disturbance, and can skid almost any time of the yeareven
in a wet spring.