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Keyword: forest soils

Biochar amendments to forest soils: Effects on soil properties and tree growth

Documents and Media Posted on: December 20, 2018
Bioenergy production from forest biomass offers a unique solution to reduce wildfire hazard fuel while producing a useful source of renewable energy. However, biomass removals raise concerns about reducing soil carbon (C) and altering forest site productivity.Document Type: Other Documents

Effects of mechanical site preparation on selected physical properties of four volcanic ash influenced forest soils in Northern Idaho

Documents and Media Posted on: December 20, 2018
Mechanical site preparation and its effects were studied on four volcanic ash influenced forest soils. Changes in bulk density, soil porosity, moisture characteristics, and volcanic ash thickness were evaluated at three slash disposal and one brush disposal site. Document Type: Other Documents

Fuels planning: science synthesis and integration; environmental consequences fact sheet 14: Fuels reduction and compaction

Publications Posted on: August 01, 2018
Moving equipment and logs over the surface of forest soils causes gouges and ruts in the mineral soil, displaces organic matter, and can cause compaction. Compaction is the component of soil productivity most influenced by forest management, but the degree to which soils may be compacted depends on initial soil bulk density.

Fuel: Logs, sticks, needles, duff, and much more

Publications Posted on: March 27, 2018
Fuels burned by either prescribed or wildfires are complex and important components of forested ecosystems. Fine fuels consisting of fallen limbs, twigs, and leaves of shrubs and trees are rich in nutrients. If these fuels are not immediately burned, nutrients can leach from these materials into the forest floor, especially if they overwinter.

Opportunities and uses of biochar on forest sites in North America [Chapter 15]

Publications Posted on: June 08, 2017
Biochar may be useful for restoring or revitalizing degraded forest soils and help with carbon sequestration, nutrient leaching losses, and reducing greenhouse gas emissions. However, biochar is not currently widely used on forested lands across North America.

Effects of prescribed fire intervals on carbon and nitrogen in forest soils of the Mogollon Rim, Arizona

Publications Posted on: May 14, 2013
The pre-European settlement ponderosa pine forests of the Mogollon Rim consisted of open stands of uneven-aged trees with a significant grass-forb understory. Light surface-fires occurred on an average interval of 2 to 12 years in Arizona and New Mexico (Dietrich 1980). These fires consumed forest floor material, burned most of the young regeneration, and promoted growth of a dense, grassy understory.

Fire and fire-suppression impacts on forest-soil carbon [Chapter 13]

Publications Posted on: May 14, 2013
The potential of forest soils to sequester carbon (C) depends on many biotic and abiotic variables, such as: forest type, stand age and structure, root activity and turnover, temperature and moisture conditions, and soil physical, chemical, and biological properties (Birdsey and Lewis, Chapter 2; Johnson and Kern, Chapter 4; Pregitzer, Chapter 6; Morris and Paul, Chapter 7). Of increasing interest to U.S.

Growth of Norway spruce seedlings after transplanting into silty soil amended with biochar: A bioassay in a growth chamber

Publications Posted on: April 02, 2013
Biochar (BC), the carbon-rich by-product resulting from pyrolysis of biomass, is used for bioenergy and increasingly as a soil additive for carbon sequestration and soil improvement. However, information about the effects of BC on forest productivity and reforestation success, especially on boreal and temperate forest soils, is scant.

Linkages between forest soils and water quality and quantity

Publications Posted on: March 04, 2010
The most sustainable and best quality fresh water sources in the world originate in forest ecosystems. The biological, chemical, and physical characteristics of forest soils are particularly well suited to delivering high quality water to streams, moderating stream hydrology, and providing diverse aquatic habitat.

Changes in forest soils as the result of exotic diseases, timber harvest, and fire exclusion and their implications on forest restoration

Publications Posted on: May 04, 2009
In the western United States and throughout the world, three general classes of coniferous forests can be identified with each having similar vegetative complexes, native disturbances, and climate (Daubenmire and Daubenmire 1968, Hann et al. 1997).