title: Nitrogen fertilizer: retrospect and prospect.
authors.affiliation: The Connecticut Agricultural Experiment Station, New Haven, CT 06504-1106, USA. charles.fink@po.state.ct.us
authors.forename: C R
authors.initials: CR
authors.lastname: Frink
authors.forename: P E
authors.initials: PE
authors.lastname: Waggoner
authors.forename: J H
authors.initials: JH
authors.lastname: Ausubel
mesh_terms: D017753:Ecosystem; D005308:Fertilizers / Q000706:statistics & numerical data; D005523:Food Supply; D006801:Humans; D009584:Nitrogen; D009586:Nitrogen Fixation; D011157:Population Dynamics; D014481:United States