C3, C4, etc:

Molecules with 3, 4, etc. carbon atoms

CCN:

Cloud condensation nuclei

CH4:

Methane

CNMP:

Comprehensive nutrient management plans

CO2equivalent:

The mass of CO2 with the same climate change potential as the mass of the greenhouse gas in question


d:

Day(s)

Denitrification:

Reduction of nitrates or nitrites to nitrogen-containing gases (mostly N2)


EPA:

U.S. Environmental Protection Agency


FID:

Flame-ionization detector


GC:

Gas chromatography


ha:

hectare; an area 100 meters square, or about 2.5 acres

H2S:

Hydrogen sulfide


IPCC:

Intergovernmental Panel on Climate Change


kg:

kilogram, or 1,000 grams (about 2.2 pounds)

km:

kilometer, or 1,000 meters


Lidar:

A device similar to radar except that it emits pulsed laser light rather than microwaves

LU:

Live unit, 500 kg of body weight


Manure:

A mixture of animal feces and urine, that may also include litter or bedding materials

MS:

Mass spectrometer

MT:

Million tones

µm:

micrometer (10-6m); micron


N:

Nitrogen

N2:

Dinitrogen molecule

NAAQS:

National Ambient Air Quality Standards

NH3:

Ammonia

Nitrification:

Oxidation of an ammonia compound to nitric acid, nitrous acid, or any nitrate or nitrite, especially by the action of nitrobacteria

nm:

nanometer; 10-9m

NO:

Nitric oxide

NOx:

Nitric oxide and nitrogen dioxide rapidly interconverted in the atmosphere

NOy:

The sum of all oxidized nitrogen species in the atmosphere

N2O:

Nitrous oxide

NRC:

National Research Council

NRCS:

National Resource Conservation Service

Nutrient excretion factor:

an estimate of an element, for example nitrogen, excreted by an animal usually reported as kg per day (or year) per animal (animal unit or kg of bodyweight).


OFAER:

On Farm Assessment and Environmental Review (of the ACWF)

OH:

Hydroxy radical



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