title: Organic nitrogen compounds as nitrogen nutrition for higher plants.
authors.forename: A I
authors.initials: AI
authors.lastname: VIRTANEN
authors.forename: H
authors.initials: H
authors.lastname: LINKOLA
mesh_terms: D009584:Nitrogen; D017672:Nitrogen Compounds; D009930:Organic Chemicals
chemical_list: D017672:Nitrogen Compounds; D009930:Organic Chemicals; D009584:Nitrogen