The Wood and Fiber Supply Chain Experts
Biomass Harvest Guidelines
From the July 2010 Forest2Mill newsletter.
Despite a barrage of bad news in June, biomass energy markets are
showing signs of maturing. As more facilities gain support and acquire permits and funding,
timberland owners will be faced with new decisions. First, they will need to decide whether to
manage their lands for both timber and biomass production. Certainly, timberland owners can realize
additional revenue if biomass demand exists locally. Many landowners, concerned about the
ramifications of removing this material, will choose to leave logging slash in the forest as they
have always done to improve soil conditions and provide animal habitats.
Biomass can be harvested in such a way that allows timberland owners to improve
profitability and preserve their forests. Many states — especially those with mature biomass
energy markets — have adopted or begun developing biomass harvesting guidelines. From
Washington state to Alabama and Maine to California, states with significant forest resources have
begun taking a serious look at what best practices should be in place to ensure
sustainability.
The Forestry Guild, a professional organization of forest
stewards and natural resource professionals who are passionate about restoring and sustaining
forests while meeting the needs of the communities that rely on them, recently published "Biomass
Retention and Harvesting for the Northeast." Though these guidelines will only apply to the
Northeast, they do provide a model for the types of issues that should be considered on a region by
region, state by state, and sometimes tract by tract basis.
Since the meaning varies dramatically among sources and states, most published guidelines
begin with a clear definition of
biomass. the Forestry Guild defines biomass as “vegetation removed from the forest,
usually logging slash, small-diameter trees, tops, limbs, or trees not considered merchantable in
traditional markets." The Guild has also defines a sustainability goal that consists
of balancing “the needs of the present” with “the ability of future generations to meet their
needs.”
In general, guidelines for harvesting biomass are the same as those for sawtimber and
pulpwood harvests. Because material that would have been left on the forest floor would be removed
during biomass harvest, however, some additional guidelines will ensure forest health:
- Avoid Re-Entry: Integrate biomass harvesting with other forest operations to prevent negative site impacts such as soil compaction and disruption of post-harvest regeneration.
- Protect Soil Quality: Avoid low-nutrient sites; on other sites, retain 15-33 percent of tops and limbs, depending on the intensity of harvests; retain and scatter woody material of a variety of sizes across the tract; minimize removal of needles and leaves.
- Retain Habitat for Wildlife and Biodiversity: Leave litter, roots, stumps and downed woody material; leave an appropriate number of live cavity, den trees, live decaying trees and snags.
- Protect Rare Forests and Species: Restrict biomass harvests in old growth or imperiled forests types unless needed to perpetuate the type or reduce invasive species and wildfire risk.
As the science of forestry and society’s values concerning our forests have evolved, the forestry industry has been proactive in adopting best practices for managing forests and harvesting timber. Unlike coal mining and oil drilling, where the longevity of the industry is determined solely by how quickly the fossil fuels are being depleted, the longevity of the forestry industry depends upon the renewability of forest resources. As a result, timber owners and buyers have strong and compelling incentives for managing and harvesting timber with a view toward the future. The introduction of a new market for logging slash will provide another opportunity for the industry to continue this work.
Additional Stories from the July 2010 Forest2Mill Newsletter:
Industry at a
Glance
Housing
Market Update
Will New
Industrial Boiler MACT Standards Affect You? Act Now.
Pacific Northwest
Update
USDA
Approves ArborGen Tests: Location of Genetically Modified Eucalyptus Test Sites