{"id":"S85092063","label":"Nitrogen--Fixation","description":"Here are entered works on the process of taking up free nitrogen, either by microorganisms or by technical or natural processes. Works on the formation of nitrites and nitrates in soil, sewage sludge, etc. from other nitrogenous compounds by microorganisms are entered under [Nitrification.]","source_url":"https://id.loc.gov/authorities/subjects/sh85092063","normalized_label":"nitrogen--fixation","broader":["http://id.loc.gov/authorities/subjects/sh85014144"],"aliases":["BNF (Biological nitrogen fixation)","Biological nitrogen fixation","Bionitrogen fixation","Dinitrogen fixation","Fixation of nitrogen","Nitrogen fixation"],"source_identifier":"http://id.loc.gov/authorities/subjects/sh85092063","provider":"lcsh","revision":"9dc43e4264bc7d6c","taxonomy_revision":"f050b5d4780b1289","title":"Nitrogen--Fixation","url":"/topics/S85092063","kind":"topic-directory","aeo_cohort":"topic-directory","catalogue_revision":"f050b5d4780b1289","numeric_address":"903191645867360836","address_version":"morton4x16-v1","coordinates":[0,20,18843,31744],"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}