- National Forest
- Public lands administered by the USDA Forest Service. These are forested lands that are supposed to have multiple use management, but in the last 30 years, have been dominated by the timber industry for deforestation purposes. A national forest also allows mining and grazing industries to extract the public resources, always at below market value. The national forest in the Umpqua basin is the Umpqua National Forest.
- National Parks
- Public lands administered by USDI National Park Service. These public lands are managed exclusively for the preservation of their natural resources. The National Park Service also manages National Monuments and Historic Sites. It is distinct from the USDA Forest Service in that logging, mining, and grazing are forbidden. Congress has tried to sell our National Parks, because they want the resources available for extraction. One national park is in the Umpqua basin is Crater Lake National Park.
- Neotropical bird species
- Birds that breed and nest in North America, but migrate each fall to warmer climates in tropical regions of Mexico, Central America, South America, and the Caribbean.
- NEPA (National Environmental Policy Act)
- Congress passed NEPA in 1969 to allow public input into the decision making of public resources. One of the major tenets of NEPA is its emphasis on public disclosure of possible environmental effects of any major action on public lands. Section 102 of NEPA requires a statement of possible environmental effects to be released to the public and other agencies for review and comment. (See EA and EIS).
- NFLRMP (National Forest Land and Resource Management Plan)
- Also called "The Forest Plan" or "The Plan," this document guides the management of a particular National Forest and establishes management standards and guidelines for all lands of that National Forest. (For BLM, the equivalent is the RMP).
- NFMA (National Forest Management Act)
- This law was passed in 1976 and requires the preparation of Regional Guides and Forest Plans.
- No action alternative
- Included in EAs, the most likely condition expected to exist in the future if management practices continue unchanged.
- Nonconsumptive use
- The use of a resource that does not reduce the supply. For instance, bird watching is a non-consumptive use of wildlife.
- Nonpoint source pollution
- Pollution whose source is not specific in location. The sources of the discharge are dispersed, not well defined, or constant. Rain storms and snowmelt often make this type of pollution worse. Examples include sediments from logging activities and runoff from agricultural chemicals and cow dung.
- Non-renewable resource
- A resource whose total quantity does not increase measurably over time, so that each use of the resource diminishes the supply. Old Growth Timber is a non-renewable resource because 200 to 1000 year old stands of trees cannot be readily replaced, especially if management dictates that they will continue to be cut every 60 years.
- Notice of intent
- A notice in the federal register of intent to prepare an environmental impact statement on a proposed action.
- Nutrient cycle
- The circulation of chemical elements and compounds, such as carbon and nitrogen, in specific pathways from the non-living parts of ecosystems into the organic substances of the living parts of ecosystems, and then back again to the non-living parts of the ecosystem. For instance, nitrogen in wood is returned to the soil as the dead tree decays; the nitrogen again becomes available to living organisms in the soil, and upon their death, the nitrogen is available to plants growing in that soil. It is the interruption of the nutrient cycle that makes the slash and burn deforestation practices incompatible to sustainable forestry.
- NWFP - Northwest Forest Plan, (see Option 9.)
- President Clinton's forest plan that put new environmental regulations into effect in the summer of 1994. Developed to ease gridlock between the courts and industry. Its emphasis was on managing federal timber in a way to prevent species extinction.