Items starting with N
Natural Disturbance
See Disturbance.
Natural Range of Variability
See Range of Variability
Natural Resource
A feature of the natural environment that is of value in serving human needs.
NEPA
National Environmental Policy Act
Nest Survey
A way to estimate the size of a bird population by counting the number of nests in a given area.
NFRS
National Forest recreation sites that have been inventoried.
NMFS
National Marine Fisheries Service
No Action Alternative
The most likely condition expected to exist in the future if management practices continue unchanged.
No Surface Occupancy (NSO)
A fluid minerals leasing constraint that prohibits occupancy or disturbance on all or part of the lease surface to protect special values or uses. Lessees may exploit the fluid mineral resources under the leases restricted by this constraint through use of directional drilling from sites outside the NSO area.
NOA
Notice of Availability