{"id":"S85092051","label":"Nitrification","description":"Here are entered works on the formation of nitrites and nitrates in soil, sewage sludge, etc. from other nitrogenous compounds by microorganisms. Works on the uptake of free nitrogen, either by microorganisms or by technical or natural processes, are entered under [Nitrogen--Fixation.]","source_url":"https://id.loc.gov/authorities/subjects/sh85092051","normalized_label":"nitrification","broader":["http://id.loc.gov/authorities/subjects/sh85096307"],"aliases":[],"source_identifier":"http://id.loc.gov/authorities/subjects/sh85092051","provider":"lcsh","revision":"855cfce8694ad13c","taxonomy_revision":"f050b5d4780b1289","title":"Nitrification","url":"/topics/S85092051","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"864911049034711620","address_version":"morton4x16-v1","coordinates":[0,20,18843,19456],"answer_status":"Directory metadata; local answer requires separate source review","truth_status":"Subject descriptor, not a factual answer or a demonstrated knowledge gap","reviewed_answer":null}