• WordNet 3.6
    • n nitrification the oxidation of ammonium compounds in dead organic material into nitrates and nitrites by soil bacteria (making nitrogen available to plants)
    • n nitrification the chemical process in which a nitro group is added to an organic compound (or substituted for another group in an organic compound)
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Webster's Revised Unabridged Dictionary
    • Nitrification A process of oxidation, in which nitrogenous vegetable and animal matter in the presence of air, moisture, and some basic substances, as lime or alkali carbonate, is converted into nitrates.
    • Nitrification (Chem) The act or process of oxidizing nitrogen or its compounds so as to form nitrous or nitric acid.
    • Nitrification (Chem) The act, process, or result of combining with nitrogen or some of its compounds.
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Century Dictionary and Cyclopedia
    • n nitrification The process, induced by certain microbes, by which, the nitrogen of organic material in the soil is oxidized to nitric acid. A certain degree of heat and the presence of moisture, air, and a base which may combine with the acid are necessary conditions of nitrification.
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Webster's Revised Unabridged Dictionary
Cf. F. nitrification,. see Nitrify


In literature:

The evidence for the ferment theory of nitrification is now very complete.
"Scientific American Supplement, Vol. XIX, No. 470, Jan. 3, 1885" by Various
The work of the nitrifying germs is called nitrification.
"The First Book of Farming" by Charles L. Goodrich
We have already, in the chapter on Nitrification, referred to the action of gypsum in promoting nitrification.
"Manures and the principles of manuring" by Charles Morton Aikman

In news:

Active Mixing Tames Nitrification .
Redwood City, Calif, installs active mixer to control nitrification episodes.
Results from replicated strip trials harvested by Iowa Soybean Association (ISA) On-Farm Network growers show that fall-applied anhydrous ammonia might benefit from proper use of a nitrification inhibitor.