00804nam a2200301 a 450000100080000000500110000800800410001910000150006024501170007526000390019230000110023152000530024265000160029565000130031165000110032465000120033565000090034765000160035665000130037265000090038565300110039465300200040565300190042570000150044470000160045970000130047570000140048812103262004-02-16       1984    bl uuuu      00u1 u    #d1 aTANAKA, A.  aAgro-ecological condition of the oxisol-ultisol area of the Amazon River systembreport of a preliminary survey.  aSapporo: Hokkaido Universityc1984  a101 p.  aPhysiography; Soils; Crops and their management.  aagriculture  aAmazonia  aBrazil  aecology  asoil  aAgricultura  aEcologia  aSolo  aBrasil  aRegiao Tropical  aTropical zones1 aSAKUMA, T.1 aOKAGAWA, N.1 aIMAI, H.1 aOGATA, S.