A Dairy Cow is a Bovine from which milk production is intended for human consumption, or is kept for raising replacement dairy heifers.

Degradable refers to a substance that can be degraded, decomposed or otherwise broken down into a more simple chemical structure over time via chemical or biological means.

The Detection Level is the lowest "measurable” analyte Concentration by a specified method. By improving our technologies, we are also lowering the detection level for nearly all methods.

A Detection Limit is the lowest Concentration of a chemical that can reliably be distinguished from a zero concentration.

A Deviation is an abnormality or a departure from what is required or expected. In numerical data sets, the difference or distance of an individual observation or data value

A Diesel Oxidation Catalyst (DOC) is a diesel oxidation Catalyst (DOC) is a device added to the exhaust system of a Tractor that reduces the amount of particulate Matter (PM) emitted.