00659naa a2200241 a 450000100080000000500110000800800410001910000180006024500660007826000090014465300120015365300220016565300210018765300100020865300110021865300100022965300140023965300150025365300250026865300170029365300170031077300900032710348372005-04-11       2004    bl uuuu     u00u1 u    #d1 aJANZEN, H. H.  aCarbon cycling in earth systems - a soil science perspective.  c2004  aCarbono  aCasa de vegetacao  aCiclo do carbono  aClima  aEstufa  aGases  aMitigacao  aNitrogenio  aSequestro de carbono  aTroca global  aUso da terra  tAgriculture Ecosystems & Environment, Amsterdamgv. 104, n. 3, p. 399-417, dec. 2004.