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Displaying 5461 - 5480 of 5651

On September 11 and 12, 1973 a severe forest fire burned over a number of watersheds in the area west of Salmon Arm, B. C. The hydrologic effects of this forest fire were assessed using streamflow data for one stream draining a small watershed with…
Author(s): J. D. Cheng
Year Published:

A severe natural windstorm followed by a high intensity forest fire caused significant increases in runoff and in losses of nitrogen, phosphorus, and potassium from two small Precambrian watersheds. Both the windstorm and the fire had significant…
Author(s): D. W. Schindler, R. W. Newbury, Kenneth G. Beaty, J. Prokopowich, T. Ruszczynski, J. A. Dalton
Year Published:

Evidence of fire history over the past few centuries was gathered in two areas (totaling 30,000 acres; 6000 ha) for fire management planning. Findings are some of the first detailed data for western redcedar-hemlock forests. On upland habitat types…
Author(s): Stephen F. Arno, Dan H. Davis
Year Published:

This report summarizes available information on fire as an ecological factor for forest habitat types occurring on the Lolo National Forest. The Lolo National Forest habitat types are grouped into 10 Fire Groups based primarily on fire's role…
Author(s): Kathleen M. Davis, Bruce D. Clayton, William C. Fischer
Year Published:

Dendrochronology, the study of annual rings in woody plants, has developed into a useful tool for a number of different fields of study. Based on the interaction of trees and the climate, it is possible to use tree-rings as proxy data in…
Author(s): Marvin A. Stokes
Year Published:

The effects of burning no nitrogen (N) losses and transformations in red pine (Pinus resinosa Ait.), eastern hemlock [Tsuga canadensis (L.) Carr.], and Douglas-fir (Pseulotsuga menziesii)/western larch (Larix occidentalis Nutt.) forest floor were…
Author(s): G. D. Mroz, Martin F. Jurgensen, Alan E. Harvey, Michael J. Larsen
Year Published:

Extensive networks of magnetic direction-finding (DF) stations have been installed throughout the western United States and Alaska to facilitate early detection of lightning-caused fires. Each station contains a new wideband direction-finder that…
Author(s): E. Philip Krider, R. C. Noggle, A. E. Pifer, Dale L. Vance
Year Published:

Historical evidence indicates that fires were prevalent in grasslands. In the past, big prairie fires usually occurred during drought years that followed l to 3 years of above-average precipitation, which provided abundant and continuous fuel. Fire…
Author(s): Henry A. Wright, Arthur W. Bailey
Year Published:

Damage from tractor logging and slash burning in a Douglas-fir stand on gentle terrain was measured for three different types of timber harvesting. Logging damage was light in the selection-cut and understory-removal cutting units. In the overstory-…
Author(s): Robert E. Benson
Year Published:

The Bridger-Teton National Forest in the Jackson Hole Region of Wyoming has long been recognized for its wildlife resource. Management efforts have emphasized the measurement of forage utilization by elk (Cervus canadensis nelsoni) and their effect…
Author(s): George E. Gruell
Year Published:

It is often quite difficult to compare fire history studies conducted by different investigators because different terms may be used to refer to the same concept and the same term may be used to refer to different concepts. To help resolve this…
Author(s): William H. Romme
Year Published:

The quality of a forest site is governed by its physical conditions (temperature, moisture, soil parent materials) as they affect plant and soil. Microbes greatly affect soil development. Their activities mediate nutrient status through release,…
Author(s): Alan E. Harvey, Martin F. Jurgensen, Michael J. Larsen
Year Published:

This report discusses fire-related research needs in the western regions of the Forest Service. These needs were expressed by personnel at all management levels. Responses were one part of a more general study designed to establish information…
Author(s): Richard J. Barney
Year Published:

Examines economic feasibility of managing nonslash fuels in mature timber to reduce the costs and damages of wildfire. A 1.2-million-acre (496,000 hectare) study area is stratified by timber value, fire occurrence rate, and fuel hazard. Maximum…
Author(s): Donald Brent Wood
Year Published:

The main effect burning on water quality is the potential for increased runoff of rainfall. Runoff may carry suspended soil particles, dissolved inorganic nutrients, and other materials into adjacent streams and lakes, reducing water quality and…
Author(s): A. R. Tiedemann, Carol E. Conrad, John H. Dieterich, James W. Hornbeck, Walter F. Megahan, Leslie A. Viereck, Dale D. Wade
Year Published:

Systems to enable land managers to locate, evaluate, and counter the fire threat of lightning storms are in the early stages of development. In the western U.S. and Alaska, the Bureau of Land Management has established networks of instruments that…
Author(s): Donald J. Latham
Year Published:

Fire frequencies averaged 32 to 70 years in sagebrush-grass communities. Early spring and late fall fires are the least harmful to perennial grasses, although small plants and those with coarse stems are more tolerant of fire than large plants and…
Author(s): Henry A. Wright, Leon F. Neuenschwander, Carlton M. Britton
Year Published:

Elk use of aspen alones was deterred only one winter following prescribed fire. Numbers of aspen suckers on the nine burned clones increased 178 percent in 3 years, but the response varied greatly among clones. Elk browsing the third winter after…
Author(s): Joseph V. Basile
Year Published:

Many species of insects and diseases create residues that predispose forests to fire. Conversely, natural factors such as fire, wind-throw, and other agents create forest residues that predispose forests to diseases and insects, including bark and…
Author(s): David G. Fellin
Year Published:

Sorption studies of ponderosa pine (Pinus ponderosa Laws.) needles and litter beds of current year cast show a shorter response time and lower equilibrium moisture contents than most other conifer needle data in the literature. For conditions below…
Author(s): Hal E. Anderson, Robert D. Schuette, Robert W. Mutch
Year Published: