It can't digest crude organic matter and simultaneously nitrify humus.    From Wordnik.com.  [Organic Gardener's Composting] Reference

You could not expect it to nitrify humus while it was also being required to digest organic matter.    From Wordnik.com.  [Organic Gardener's Composting] Reference

A thin layer of solution will nitrify sooner than a deep layer, owing to the larger proportion of oxygen available.    From Wordnik.com.  [Scientific American Supplement, No. 470, January 3, 1885] Reference

At any rate it seems to be invariably the case that when a mixture of nitrogen compounds, including ammonia salts, are allowed to nitrify, the nitrogen in the form of ammonia is the first to become nitrified.    From Wordnik.com.  [Manures and the principles of manuring] Reference

Warington at Rothamsted, who showed that the power of nitrification could be communicated to media, which did not nitrify, by simply seeding them with a nitrifying substance, and that light was unfavourable to the process.    From Wordnik.com.  [Manures and the principles of manuring] Reference

R. Warington, J.T. Schloessing, C.A. Müntz and others had proved that nitrification was promoted by some organism, when Winogradsky hit on the happy idea of isolating the organism by using gelatinous silica, and so avoiding the difficulties which Warington had shown to exist with the organism in presence of organic nitrogen, owing to its refusal to nitrify on gelatine or other nitrogenous media.    From Wordnik.com.  [Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 2 "Baconthorpe" to "Bankruptcy"] Reference

It said measures needed to be put in place to de-nitrify the final effluent; phosphorus removal may also be required.    From Wordnik.com.  [An Irish Town Planner's Blog] Reference

Should nitrify well.    From Wordnik.com.  [Nitro-Explosives: A Practical Treatise] Reference