Usage History of 'nitrifiers'

The following chart shows how frequently 'nitrifiers' appeared in printed materials over time. For example, the word 'nitrifiers' occurred 2 times in books in 1873 and 1,123 times in 2008. From 1873 to 2008, the word 'nitrifiers' was used a total of 27,260 times in books scanned by Google. See Reference: Google Ngram project.

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