00456naa a2200169 a 450000100080000000500110000800800410001910000190006024500500007926000090012965000190013865000190015765000160017665000230019265000090021577300620022413698251998-07-21       1977    bl ---       0--  u    #d1 aRUSSELL, E. W.  aThe role of organic matter in soil fertility.  c1977  aorganic matter  asoil fertility  aFertilidade  aMatéria Orgânica  aSolo  tPhil. Trans. R. Society Lond. B.gv.281, p.209-219, 1977.