00544naa a2200217 a 450000100080000000500110000800800410001910000160006024500490007626000090012565000120013465000160014665000110016265000140017365000090018765300190019665300130021565300260022865300110025477300610026515479661993-02-15       1982    bl ---       0--  u    #d1 aPEREIRA, J.  aNitrogen cycling in South American savannas.  c1982  aCerrado  aNitrogênio  aOxisol  aRhizobium  aSolo  aAmerica do Sul  aCiclagem  aFixacao de nitrigenio  aSavana  tPlant and Soil, The Haguegv.67, n.1/3, p.293-304, 1982.