Items starting with P


A form of rock art created by applying mineral based or organic paint to rock surfaces.

Planning Analysis

A process using appropriate resource data and NEPA analysis to provide a basis for decisions in areas not yet covered by an RMP

Planning Area

The area of National Forest land covered by a Regional Guide or Forest Plan.

Planning Criteria

The standards, rules, and other factors developed by managers and interdisciplinary teams for their use in forming judgments about decision making, analysis, and data collection during planning. Planning criteria streamlines and simplifies the resource management planning actions.

Planning Period

The 50 year time frame for which goods, services, and effects were projected in the development of the Forest Plan.


Plan of Development

Pole Timber

Trees at least 5 inches in diameter, but smaller than the minimum size for sawtimber.


The stage of forest succession in which trees are between 3 and 7 inches in diameter and are the dominant vegetation.

Potential Wilderness Area

An area including those previously identified in the Forest Service Roadless Area Conservation, Final Environmental Impact Statement, Volume 2, dated November 2000, in a unit plan, or in a land management plan, which remain essentially roadless and undeveloped, and which have not yet been designated as wilderness or for non-wilderness uses by law (FSM 1905).

Pre-commercial thinning

The removal of trees not for immediate financial return but to reduce stocking,to concentrate growth on the more desirable trees, or to accomplish some other resource objective such as fuel reduction.

Preparatory Cut

The removal of trees near the end of a rotation to open the canopy so the crowns of seed bearing trees can enlarge. This improves seed production and encourages natural regeneration. (See rotation.)

Prescribed burning

The fire management technique of purposely igniting a fire in a vegetated ecosystem to restore forest health and to reduce fire hazard.

Prescribed Fire

Fire set intentionally in wildland fuels under prescribed conditions and circumstances. Prescribed fire can rejuvenate forage for livestock and wildlife or prepare sites for natural regeneration of trees.

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