title: Global nitrogen: cycling out of control.
authors.forename: Scott
authors.initials: S
authors.lastname: Fields
mesh_terms: D000818:Animals; D001419:Bacteria; D017753:Ecosystem; D004785:Environmental Pollutants / Q000032:analysis*; D005308:Fertilizers; D006801:Humans; D009584:Nitrogen / Q000378:metabolism*; D018517:Plant Roots / Q000502:physiology; D026361:Reactive Nitrogen Species; D012987:Soil; D014867:Water / Q000737:chemistry
chemical_list: D004785:Environmental Pollutants; D005308:Fertilizers; D026361:Reactive Nitrogen Species; D012987:Soil; D014867:Water; D009584:Nitrogen