00513naa a2200169 a 450000100080000000500110000800800410001910000250006024500890008526000090017465000100018365000120019365000180020570000200022370000210024377300790026418404282010-01-10       1999    bl ---       0--  u    #d1 aFRANZLUEBBERS, A. J.  aSoil carbon, nitrogen, and aggregation in response to type and frequency of tillage.  c1999  aÁgua  aCerrado  aConservação1 aLANGDALE, G. W.1 aSCHOMBERG, H. H.  tSoil Science Society of America Journal, Madisongv. 63, p. 349-355, 1999.