U.S. Forest Service Research Legacy Documents

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A bank-operated traveling-block cableway for stream discharge and sediment measurements .
Stream measurements - - Idaho - - Nezperce National Forest. ; Suspended sediments - - Idaho - - Nezperce National Forest - - Measurement. ; Forests and forestry - - Idaho - - Nezperce National Forest.
Streams often present a challenge for collecting flow and sediment measurements on a year-round basis. Streams that normally can be waded become hazardous during seasonal flows, either endangering hydrographers or precluding data collection...
U.S. Forest Service Research Legacy Documents

A comparison of carrying capacity perceptions among visitors to two wildernesses .
Wilderness areas - - United States - - Recreational use. ; Wilderness areas - - California - - Recreational use. ; Wilderness areas - - Montana - - Recreational use. ; Wilderness area users - - California - -...
Visitors to two wildernesses -- the heavily-used Desolation Wilderness in California and the lightly-used Spanish Peaks Primitive Area in Montana -- were surveyed. Although visitors to both areas had common images of wilderness in a general sense,...
U.S. Forest Service Research Legacy Documents

A data structure for describing sampling designs to aid in compilation of stand attributes .
Forest site quality. ; Forests and forestry - - Measurement - - Statistical methods.
Maintaining permanent plot data with different sampling designs over long periods within an organization, and sharing such information between organizations, requires that common standards be used. A data structure for the description of the...
U.S. Forest Service Research Legacy Documents

A management decision framework for winnowing simulated all-aged stand prescriptions
Forest management -- Computer programs.
The relatively simple set of WINNOW procedures and computer programs for simulating and selecting one best silvicultural/managerial all-aged prescription from many alternatives is described. The selection basis may be sustained annual volume or...
U.S. Forest Service Research Legacy Documents

A model for predicting lightning fire ignition in wildland fuels .
Lightning -- United States. ; Forest fires -- United States.
This report describes a model for predicting the number of lightning-caused ignitions in forest fuels. The model is based on the physical processes involved in ignition of fine woody fuels by lightning and the chance occurrence of the simultaneous...
U.S. Forest Service Research Legacy Documents

A multilevel optimization system for large-scale renewable resource planning .
Renewable natural resources - - United States - - Planning - - Mathematical models. ; Forests and forestry - - Economic aspects - - United States. ; Renewable natural resources - - Planning Mathematical models. ; ...
This report analyzes and evaluates one approach to utilizing local planning analyses of public renewable resource management agencies as an input in developing large-scale (national) resource management plans. A type of multilevel approach...
U.S. Forest Service Research Legacy Documents

A photographic utilization guide for key riparian graminoids.
Grazing - - Idaho. ; Grasses - - Utilization - - Idaho. ; Riparian plants - - Utilization - - Idaho.
Photographic guides are presented to help estimate grazing utilization of important riparian grasses and grasslike plants. Graphs showing the percent of a plant's weight that has been consumed based on percent of its height left after grazing allow...
U.S. Forest Service Research Legacy Documents

A reexamination of fire spread in free-burning porous fuel beds .
Flame spread - - Mathematical models. ; Wildfires - - Prevention and control - - Mathematical models.
Experimental evidence from 250 test fires confirms the general formulation of Rothermel's 1972 mathematical model for predicting fire spread in wildland fuels. Numerical coefficients are reevaluated for the empirical relations governed by fuel bed...
U.S. Forest Service Research Legacy Documents

A search for phytotoxins influencing germination and early growth of ponderosa pine .
Ponderosa pine - - Seedlings. ; Ponderosa pine - - Growth.
A series of laboratory and field experiments were conducted to determine if mature ponderosa pines produce a substance (phytotoxin) that inhibits the germination and growth of seedlings directly under the tree crown. Neither live nor dead materials...
U.S. Forest Service Research Legacy Documents

A transmitter for tracking wildlife
Radio -- Transmitters and transmission -- Design and construction ; Animal radio tracking ; Wildlife monitoring -- Equipment and supplies.
Schematics are presented for a transmitter with an amplifier stage to increase receiving distance. Weight of the transmitter with one battery is 2 ounces, maximum battery life is 45 days, and maximum receiving distance is 2-1/2 miles.
U.S. Forest Service Research Legacy Documents

Age-class structure of old growth ponderosa pine Douglas fir stands and its relationship to fire history
Ponderosa pine -- Montana. ; Douglas fir -- Montana. ; Old growth forests -- Montana. ; Forest fires -- Montana.
Describes age structure of nine old growth ponderosa pine/Douglas-fir stands in western Montana. Interprets the influence of past fires and 20th century fire exclusion on stand structure. Gives implications for management to restore and maintain...
U.S. Forest Service Research Legacy Documents

Agroforestry and sustainable systems : symposium proceedings .
A combination of 30 invited papers and 23 volunteer poster papers presented agroforestry concepts, state-of-the-art agroforestry practices, special applications of agroforestry technologies, regional needs and opportunities for agroforestry in the...
U.S. Forest Service Research Legacy Documents

Air tanker performance guides :: general instruction manual
Aerial spraying and dusting in agriculture -- United States -- Handbooks, manuals, etc. ; Fire extinction -- Handbooks, manuals, etc. ; Fire prevention -- United States -- Handbooks, manuals, etc.
Presents land area, commercial timberland area, timber inventory, and growth and mortality data based on Resources Evaluation standards.
U.S. Forest Service Research Legacy Documents

An Analysis of the outdoor recreation and wilderness situation in the United States, 1989-2040 : a technical document supporting the 1989 RPA assessment .
Outdoor recreation - - Government policy United States. ; Wilderness areas - - United States - - Recreational use. ; Recreation areas - - United States.
The Forest and Rangeland Renewable Resources Planning Act of 1974 (RPA), P.L. 93-378, 88 Stat. 476, as amended, directed the Secretary of Agriculture to prepare a Renewable Resources Assessment by December 31, 1975, with an update in 1979 and each...
U.S. Forest Service Research Legacy Documents

An Analysis of the timber situation in the United States, 1989-2040 .
Lumber trade - - United States Forecasting. ; Timber - - United States - - Forecasting. ; Forests and forestry - - United States - - Forecasting.
he Forest and Rangeland Renewable Resources Planning Act of 1974 (RPA), P.L. 93-378, 88 Stat. 475, as amended, directed the Secretary of Agriculture to prepare a Renewable Resources Assessment by December 31, 1975, with an update in 1979 and each...
U.S. Forest Service Research Legacy Documents

An annotated bibliography of the hydrology and fishery studies of the South Fork, Salmon River
Fish populations -- Idaho -- Salmon River, South Fork -- Bibliography. ; Fisheries -- Idaho -- Hydrologic factors -- Bibliography. ; Hydrology -- Research -- Idaho -- Salmon River, South Fork -- Bibliography. ; Fish...
A brief summary of the land management history of the South Fork Salmon River (Idaho) watershed includes citations and annotations of published and unpublished reports of fishery and hydrology studies conducted in the South Fork drainage for 1960...
U.S. Forest Service Research Legacy Documents

An Ecological basis for ecosystem management:
Ecosystem management -- United States. ; Nature conservation-- United States. ; Conservation of natural resources -- United States.
Guiding principles based on conservation biology are applied in assessing ecosystem needs. Ecosystem, economic, and social needs are integrated in a decision model in which the guiding principles are used as a primary filter for evaluating proposed...
U.S. Forest Service Research Legacy Documents

An improved framework for estimating RPA values .
Farm management - - United States. ; Farm management. ; Forests and forestry - - Economic aspects - - United States. ; Forests and forestry - - Economic aspects. ; Forest products - - United States....
The Forest and Rangeland Renewable Resources Planning Act (RPA) of 1974, as amended by the National Forest Management Act of 1976 (NFMA), was passed to make natural resource planning more rational and accountable. The RPA value is defined in terms...
U.S. Forest Service Research Legacy Documents

Analyses of the temporal variation on coarse bedload transport and its grain size distribution : Squaw Creek, Montana, USA .
Bed load - - Montana - - Squaw Creek. ; Sediment transport - - Montana - - Squaw Creek.
A continuous record of coarse material bedload transport was obtained for an entire snowmelt high flow at Squaw Creek, a gravel-bed mountain stream in Montana. The measuring principle, the Magnetic Tracer Technique, makes use of naturally magnetic...
U.S. Forest Service Research Legacy Documents

Annual design-based estimation for the annualized inventories of forest inventory and analysis: sample size determination .
Forest surveys - - United States. ; Multiple imputation (Statistics)
The Forest Inventory and Analysis units in the USDA Forest Service have been mandated by Congress to go to an annualized inventory where a certain percentage of plots, say 20 percent, will be measured in each State each year. Although this will...
U.S. Forest Service Research Legacy Documents

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