01816nam a2200253 a 450000100080000000500110000800800410001902000180006010000160007824500370009426000480013130000100017950000290018952011610021865300130137965300210139265300280141365300230144165300190146465300170148365300250150070000160152570000210154110065772015-05-25       1973    bl uuuu      00u1 u    #d  a0-8138-1460-X1 aBUOL, S. W.  aSoil genesis and classification.  aAmes: The Yowa State University Pressc1973  a360p.  aIncludes bibliographies.  aMorphology of soils. Soil micromorphology. Soil composition and characterization. Weathering and soil formation. Pedogenic processes: internal, soil building processes. Soil environment: external factors of soil formation. Parent material: initial material of the solum. Relief and landscape factors of the soil and its environment. Contributions of climate to the total soil environment. Organisms: biological portion of the soil and its environment. Time as a factor of soil formation. Principles and historical development of soil classification. Modern soil classification systems. Entisols: recently formed soils. Vertisols: shrinking and swelling dary clay soils. Inceptisols: embryonic soils with few diagnostic features. Aridisols: soils of arid regions. Mollisols: grassland soils of steppes and prairies. Spodosols: soils with subsoil accumulations of sesquioxide and humus. Alfisols: high base status forest soils. Ultisols: low base status forest soils. Oxisols: sesquioxide-rich, highly weathered soils of the intertropical regions. Histosols: organic soils. Natural soil bodies and soilscapes. interpretations of soil classification and maps.  aAnalises  aCiência do solo  aClassificação do solo  aFormação do solo  aSoil formation  aSoil science  aSoils classification1 aHOLE, F. D.1 aMCCRACKEN, R. J.