Items starting with S

State Implementation Plan (SIP)

A strategic document, prepared by a State (or other authorized air quality regulatory agency) and approved by the U.S. Environmental Protection Agency, which thoroughly describes how requirements of the Clean Air Act will be implemented (including standards to be achieved, control measures to be applied, enforcement actions in case of violation, etc.).


Administration of land and associated resources in a manner that enables them to be passed on to future generations in a healthy condition.

Stewardship-purpose timber sales or harvest

A component of the Forest Service timber sale program that includes timber sales made primarily to help achieve desired ecological conditions or to attain some non-timber resource objective requiring manipulation of the existing vegetation.

Strategic Plan (BLM Strategic Plan)

A plan that establishes the overall direction for the BLM. This plan is guided by the requirements of the Government Performance and Results Act of 1993, covers a 5-year period, and is updated every 3 years. It is consistent with FLPMA and other laws affecting the public lands.


The sizes, shapes, and/or ages of the plants and animals in an area.


The customary and traditional uses of wild renewable resources for personal or family consumption as food, shelter, fuel, clothing, tools, or transportation; for making and selling handicraft articles out of the nonedible byproducts of fish and wildlife resources; for barter or sharing for personal or family consumption; and for customary trade.


A predictable process of changes in structure and composition of plant and animal communities over time. Conditions of the prior plant communities or successional stage create conditions that are favorable for the establishment of the next stage. The different stages of succession are often referred to as seral stages.

Suitable Uses

Activities and values on national forest lands, such as motorized and non-motorized recreation, livestock grazing, logging, mining, and fish and wildlife habitat, that the forest plan determines to be appropriate and compatible with desired conditions and objectives for certain areas.

Sustained yield

The yield that a renewable resource can produce continuously at a given intensity of management.

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