Statistical Terms Glossary

Nitrate is a nitrogen-containing compound that can exist in the atmosphere or as a dissolved gas in water. It may produce harmful effects on humans and animals

Nitric oxide (NO) is a gas formed by combustion under high pressure and high temperature in an internal combustion engine. It changes into nitrogen dioxide in the ambient air and contributes to photochemical smog

Nitrification is a biological process involving the conversion of nitrogen-containing organic compounds into nitrates and nitrites. It is part of the nitrogen cycle and considered to be beneficial since it converts organic nitrogen compounds into nitrates that can be absorbed by green plants

Nitrites are nitrous oxide salts used in food preservation

Is the conversion of free nitrogen to nitrogen combined with other elements; specifically regarding soils, the assimilation of atmospheric nitrogen from the soil air by soil organisms to produce nitrogen compounds that eventually become available to plants.

Nitrogen oxide (NO2) is a product of combustion from transportation and stationary sources. It is a major contributor to acid depositions and the formation of ground—level ozone in the troposphere.

Nitrogen exported from field in crop products / Nitrogen applied.

Nitrogenous oxygen demand (NOD) is a quantitative measure of the amount of dissolved oxygen required for the biological oxidation of nitrogenous material, for example, nitrogen in ammonia, and organic nitrogen in waste water

Nitrous oxide (N20) is a relatively inert oxide of nitrogen produced as a result of microbial action in the soil, use of fertilizers containing nitrogen, burning of timber, and so forth. This nitrogen compound may contribute to greenhouse and ozone—depleting effects

See Net national income

See nonperforming loan.

Category is restricted to persons whose work involves travel in different areas and who do not report daily in person to a fixed address, for example, itinerant traders or hawkers, travelling salesmen and long-distance lorry drivers.

A debt instrument having no scheduled return of principal and thereby perpetual interest payments and no maturity.

Number 1 goal of the SDGs, aiming to eradicating poverty in all its forms remains one of the greatest challenges facing humanity. While the number of people living in extreme poverty dropped by more than half between 1990 and 2015, too many are still struggling for the most basic human needs.

See Non-observed economy (NOE)

Unwanted or excessive sound:
-        Environmental noise: unwanted or harmful outdoor sound created by human activities, including noise emitted by means of transport, road traffic, rail traffic, air traffic, and from sites of industrial activity;
-        Transport noise: unwanted or excessive sound produced by transport systems.

Noise is an audible sound from traffic, construction and so on that may generate unpleasant and harmful effects (hearing loss). It is measured in decibels.

Noise abatement is an activity to reduce the emission of noise or vibrations from a given source, or to protect persons and built—up structures from exposure to noise and vibrations

A series of lines superimposed on a map representing equal levels of noise exposure. They show areas in which noise levels exceed a given decibel (dB) threshold.
-        Noise contours in airports.
As a result of flight traffic, noise impact is either observed or calculated for every point around the airport. Due to a difference in distance from the noise source, these values may vary sharply from one point to another. Noise contours are isolines or lines of equal noise impact, using LEQ (equivalent continuous sound level) or equivalent measures. These lines connect points where equal noise impact is observed or calculated.

Noise pollution is sound at excessive levels that may be detrimental to human health

Money market fund that does not charge a fixed fee commission to investors.

Refers to livestock raised in a situation where the agricultural holder has no permanent place of residence and does not practise regular cultivation. Livestock moves from place to place with the agricultural holder and his/her household, depending on the season and the availability of feed or water.

Refers to livestock raised in a situation where the agricultural holder has no permanent place of residence and does not practise regular cultivation. Livestock moves from place to place with the agricultural holder and his/her household, depending on the season and the availability of feed or water.