- Range management
- The art and science of planning and directing range use intended to yield the sustained maximum animal production for the benefit of the cattle industry. It has not included perpetuation of the natural resources.
- Range of variability (Also called the historic range of variability or natural range of variation.)
- The range of sustainable conditions in an ecosystem is determined by time, processes (such as fire), native species, and the land itself. Ecosystems that have a 10-year fire cycle have a narrower range of variation than ecosystems with 200-300 year fire cycle.
- Ranger District
- The administrative sub-unit of a National Forest that is supervised by a District Ranger who reports directly to the Forest Supervisor. (See Resource Area for the BLM equivalent.)
- A bird of prey, such as a eagle or hawk.
- RARE II- Roadless Area Review and Evaluation.
- The national inventory of roadless and undeveloped areas within the National Forests and Grasslands.
- The restocking of an area with forest trees, by either natural or artificial means, such as planting. All harvested units are reforested, but many fail to succeed.
- The renewal of a tree crop by either natural or artificial means. The term is also used to refer to the young crop itself.
- Regeneration harvest
- A harvest method identical to clear-cutting. Usually six to twelve trees per acre remain.
- Regional Ecosystem Office (REO)
- Reviews, and has authority to change the standards and guidelines of Option 9. They actually recommend changes and interpretations to the Regional Interagency Executive Committee, who has responsibility for the decisions.
- Regional Forester
- The official of the USDA Forest Service responsible for administering an entire region of the Forest Service. The Umpqua National Forest is in Region 6.
- Replacement volume:
- In 1995, Congress passed the now famous Salvage Logging Rider demanding that old environmentally damaging timber sales previously stopped by the courts must go forward. The exception was timber sales harboring endangered birds such as Marbled Murrelets. Congress ordered the volume from these sales to be replaced with "like kind and volume". All of the timber sales containing Marbled Murrelets were second growth sales in the Siuslaw National Forest. The Forest Service illegally replaced these sales, not with like kind and volume in the Coastal Mountain Range, but rather with old-growth in the Cascade Mountain Range. These illegal replacement volume sales on the Umpqua National Forest include Felix and Little River DEMO which were awarded to Roseburg Forest Products.
- Residual stand
- The trees remaining standing after an event such as selection cutting or clear cutting.
- Resource Area
- The administrative sub-unit of the BLM that is supervised by a Resource Area Manager who reports directly to the District Manager. (See Ranger District for the USFS equivalent.)
- Resource Management Plan
- A land use plan for BLM districts.
- Riparian area
- The area along a watercourse or around a lake or pond; a wet area.
- Riparian Reserves
- An Option 9 land designation. This is no cut buffer left along intermittent and fish bear streams. In the Umpqua basin, on the average, it is about 180 feet wide at intermittent streams, and 360 feet wide fish bearing streams. Its actual width is calculated by a multiple of a site tree.
- Resource Management Plant (RMP)
- A BLM document detailing their 10-year land management plan. (See NFLRMP.)
- Record of Decision (ROD)
- A official document in which a deciding official states the alternative that will be implemented from a prepared EIS or EA.
- The number of years required to establish and grow timber crops to a specified condition of maturity. The rotation age for Douglas Fir in the Umpqua National Forest is 80 years.