title: Environmental science: nitrogen impacts on forest carbon.
authors.forename: Peter
authors.initials: P
authors.lastname: Högberg
mesh_terms: D001272:Atmosphere / Q000737:chemistry*; D018533:Biomass; D002244:Carbon / Q000378:metabolism*; D004463:Ecology; D049672:History, 19th Century; D049673:History, 20th Century; D006802:Human Activities; D009584:Nitrogen / Q000378:metabolism*; D014197:Trees / Q000378:metabolism*
chemical_list: D002244:Carbon; D009584:Nitrogen