GLOSSARY
301
Nitrogen fixation: The transformation of atmospheric nitrogen into
nitrogen compounds that can be used by growing plants.
Nitrogen oxides (NOx): Products of combustion that contribute to
the formation of smog and ozone.
Non-asphaltic road oil: Any of the nonhardening petroleum distillates or residual oils used as dust layers. They have sufficiently
low viscosity to be applied without heating and, together with
asphaltic road oils (q.v.), are sometimes referred to as dust
palliatives.
Non-forest land: Land that has never supported forests and lands
formerly forested where use of timber management is precluded by development for other uses; if intermingled in forest
areas, unimproved roads and non-forest strips must be more
than 120 feet wide, and clearings, etc., must be more than 1 acre
in area to qualify as non-forest land.
Non-attainment area: Any area that does not meet the national
primary or secondary ambient air quality standard established
(by the Environmental Protection Agency) for designated
pollutants, such as carbon monoxide and ozone.
Non-industrial private: An ownership class of private lands where
the owner does not operate wood processing plants.
No. 1 Fuel oil: Very similar to kerosene (q.v.) and is used in burners
where vaporization before burning is usually required and a
clean flame is specified.
No. 2 Fuel oil: Also called domestic heating oil; has properties similar to diesel fuel and heavy jet fuel; used in burners where complete vaporization is not required before burning.
No. 4 Fuel oil: A light industrial heating oil and is used where preheating is not required for handling or burning; there are two
grades of No. 4 fuel oil, differing in safety (flash point) and flow
(viscosity) properties.
No. 5 Fuel oil: A heavy industrial fuel oil that requires preheating
before burning.
No. 6 Fuel oil: A heavy fuel oil and is more commonly known
as Bunker C oil when it is used to fuel ocean-going vessels;
preheating is always required for burning this oil.
O
Oil: Crude oil or condensate.
Oil from tar sand: Synthetic crude oil (q.v.).
301
Nitrogen fixation: The transformation of atmospheric nitrogen into
nitrogen compounds that can be used by growing plants.
Nitrogen oxides (NOx): Products of combustion that contribute to
the formation of smog and ozone.
Non-asphaltic road oil: Any of the nonhardening petroleum distillates or residual oils used as dust layers. They have sufficiently
low viscosity to be applied without heating and, together with
asphaltic road oils (q.v.), are sometimes referred to as dust
palliatives.
Non-forest land: Land that has never supported forests and lands
formerly forested where use of timber management is precluded by development for other uses; if intermingled in forest
areas, unimproved roads and non-forest strips must be more
than 120 feet wide, and clearings, etc., must be more than 1 acre
in area to qualify as non-forest land.
Non-attainment area: Any area that does not meet the national
primary or secondary ambient air quality standard established
(by the Environmental Protection Agency) for designated
pollutants, such as carbon monoxide and ozone.
Non-industrial private: An ownership class of private lands where
the owner does not operate wood processing plants.
No. 1 Fuel oil: Very similar to kerosene (q.v.) and is used in burners
where vaporization before burning is usually required and a
clean flame is specified.
No. 2 Fuel oil: Also called domestic heating oil; has properties similar to diesel fuel and heavy jet fuel; used in burners where complete vaporization is not required before burning.
No. 4 Fuel oil: A light industrial heating oil and is used where preheating is not required for handling or burning; there are two
grades of No. 4 fuel oil, differing in safety (flash point) and flow
(viscosity) properties.
No. 5 Fuel oil: A heavy industrial fuel oil that requires preheating
before burning.
No. 6 Fuel oil: A heavy fuel oil and is more commonly known
as Bunker C oil when it is used to fuel ocean-going vessels;
preheating is always required for burning this oil.
O
Oil: Crude oil or condensate.
Oil from tar sand: Synthetic crude oil (q.v.).