CSREES:

Cooperative State Research, Education, and Extension Service (USDA)

CWA:

Clean Water Act

CZARA:

Coastal Zone Act Reauthorization Amendments

CZMA:

Coastal Zone Management Act

Denitrification:

Reduction of nitrates or nitrites to nitrogen-containing gases.

DHIA:

Dairy Herd Improvement Association

DM:

Dry matter

DMI:

Dry matter intake

DNA:

Deoxyribonucleic acid

DOAS:

Differential optical absorption spectroscopy

dscm:

Dry standard cubic meter

Electronic nose:

An array of gas sensors that are combined with pattern recognition software to mimic human olfactory response (Lacey, 1998).

ELG:

Effluent limitation guideline

Emission flux:

The rate of mass emission per unit of area (e.g., tonnes per hour per hectare), typically from an area such as a waste lagoon or field.

Emission inventory:

A list showing the sources and amounts (e.g., tonnes) of a pollutant emitted from a defined area for a period of time, usually one year.

Emission rate:

The rate of mass emission (e.g., tonnes per hour).

EPA:

U.S. Environmental Protection Agency

EPCRA:

Emergency Planning and Community Right-to-Know Act

EQIP:

Environmental Quality Incentives Program

Feedlot:

An animal feeding operation where beef cattle are finished to slaughter weight; it consists of fenced earthen or concrete paddocks with cattle having little of no access to pasture.

FEP:

Tetrafluoroethylene-hexafluoropropylene copolymer

FID:

Flame ionization detector

FPM:

Flame photometric detector

FRM:

Federal reference method

FSA:

Farm Service Agency (USDA)

ft²:

Square feet

FTIR:

Fourier Transform Infrared Spectroscopy

g:

Gram

g/cm³:

Grams per cubic centimeter

GC:

Gas chromatography

GC-EC:

Gas chromatography with electron capture detection

GC-FID:

Gas chromatography with flame ionization detection

GC-MS:

Gas chromatography coupled with mass spectrometry

GLAS:

Ground-level area source

ha:

Hectare; an area 100 meters square, about 2.5 acres

HAP:

Hazardous air pollutant

HC:

Hydrocarbon