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Keyword: soil

Soil carbon and nitrogen pools in mid- to late-successional forest stands of the northwestern United States: Potential impact of fire

Publications Posted on: May 14, 2013
When sampling woody residue (WR) and organic matter (OM) present in forest floor, soil wood, and surface mineral soil (030 cm) in 14 mid- to late-successional stands across a wide variety of soil types and climatic regimes in the northwestern USA, we found that 44%-84% of carbon (C) was in WR and surface OM, whereas >80% of nitrogen (N) was in the mineral soil.

Threats to western United States riparian ecosystems: A bibliography

Publications Posted on: January 15, 2013
This bibliography is a compendium of state-of-knowledge publications about the threats affecting western U.S. riparian ecosystems and is a companion to the website:

Patterns of soil calcium and aluminum across the conterminous United States (Chapter 9)

Publications Posted on: October 05, 2012
The health and growth of forests depends upon soil nutrients. Calcium (Ca) is a cation - positive ion - used by plants to build cell walls (Marschner 1986). It is also involved in root and leaf development and the activation of plant enzymes (Potash and Phosphate Institute 1995).

The chemical characteristics of soil in control and experimentally thinned plots in mesic oak forests along a historical deposition gradient

Publications Posted on: September 27, 2011
This study examined the variations in the chemical parameters of soils of seven forests located along a historical deposition gradient spanning 8.5° longitude from southern Illinois to central West Virginia. Four to six mature control plots were sampled on two of the sites, and two experimentally thinned and two control plots were sampled on the remaining five sites.

Historical and modern roles of fire in pinyon-juniper

Publications Posted on: July 07, 2009
Fire history investigations were carried out in three widely separated Great Basin pinyon-juniper woodlands in east-central Nevada, southeastern Oregon and northwestern Nevada, and western Nevada. Study results suggested frequent fires on deep soils that produced an abundance of fine fuels and infrequent fires on shallow soils and rocky sites where fuels were sparse.

Proceedings: ecology and management of pinyon-juniper communities within the Interior West; 1997 September 15-18; Provo, UT

Publications Posted on: July 07, 2009
A symposium held September 15-18,1997, in Provo, UT, and Sanpete County, UT, provided information on the ecology, management, resource values, and restoration of pinyon-juniper communities in the Interior Western United States. The conference was hosted by the USDA Forest Service, Rocky Mountain Research Station and the Utah Division of Wildlife Resources in cooperation with personnel from other agencies and organizations.

Soil quality is fundamental to ensuring healthy forests

Publications Posted on: April 07, 2009
Government agencies, industrial landowners, and private landowners often strive to maintain soil quality after site management activities in order to maintain site productivity, hydrologic function, and ecosystem health. Soil disturbance resulting from timber harvesting, prescribed fire, or site preparation activities can cause declines, improvements, or have no effect on site productivity and hydrologic function.

A striking profile: Soil ecological knowledge in restoration management and science

Publications Posted on: December 17, 2008
Available evidence suggests that research in terrestrial restoration ecology has been dominated by the engineering and botanical sciences. Because restoration science is a relatively young discipline in ecology, the theoretical framework for this discipline is under development and new theoretical offerings appear regularly in the literature.

A comparison of bareroot and containerized seedling production

Publications Posted on: November 05, 2008
Most nursery managers and culturists are comfortable growing bareroot seedlings. A few have become comfortable growing containerized seedlings. This discussion will compare the two systems, with a focus on SYP production, and will include a discussion on capital, equipment, space, and personnel requirements.

A tale of two rare wild buckwheats (Eriogonum subgenus Eucycla (Polygonaceae)) from Southeastern Arizona

Publications Posted on: April 01, 2008
Unusual soils, compared to surrounding common soils, act as edaphic habitat islands and often harbor rare plants. These edaphic elements can be disjuncts or endemics. Two rare wild buckwheats from southeastern Arizona that grow on Tertiary lacustrine lakebed deposits have been found to be a disjunct, and an endemic. Eriogonum apachense from the Bylas area is determined to be a disjunct expression of E. heermannii var.