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English definition of “nitrification”

nitrification

noun [U] uk   /ˌnaɪ.trɪ.fɪˈkeɪ.ʃən/ specialized us  
the process in which bacteria in the soil use oxygen to change compounds of nitrogen in dead plant material into nitrates which plants can then absorb as foodPhysical and chemical processes
(Definition of nitrification from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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