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Foram realizados estudos (granulométrico, químico e taxonômico) de quatro perfis de solos localizados na bacia hidrográfica do ribeirão Tijuco Preto, município de Rio das Pedras, SP. Os quatro perfis foram classificados segundo o sistema americano de 1967, enquanto apenas dois foram classificados, com segurança, nas unidades de mapeamento definidas pela Comissão de Solos do Serviço Nacional de Pesquisas Agronômicas. Nesse estudo não se procurou examinar os critérios nos quais está baseada a classificação americana, mas tão somente verificar a sua aplicabilidade em alguns solos do Estado de São Paulo. In this paper four soil profiles ocurring on a toposequence located in the hydrographic basin of the Tijuco Preto stream, Rio das Pedras County in the State of São Paulo were studied. On the lower part of the toposequence a Lithosol-argillite-shale substratum phase (TP-12) and a Red-Yellow Podzolic Soil Piracicaba variation (TP-13) were found. On the upper part of the toposequence an Ortho Dark Red Latosol (TP-17) and a «Latosol Roxo» (TP-18) were found. The soils were classified both according to the 7th Approximation and the classification of the former Brazilian National Soil Comission. The classifications were based on both chemical and physical data as well as on the morphologic features of the soil profiles. The soil classification at a family level was based on mincralogical data of the same profiles presented in a previous paper

Gênese e classificação de alguns solos da bacia do Ribeirão Tijuco Preto, Município de Rio das Pedras, SP: II - Classificação dos solos