RESUMO:O estudo sobre os atributos mineralógicos e químicos de solos de várzea geram informações para compor um levantamento atual sobre a susceptibilidade do solo de várzea ao processo de Terras caídas. Com esse objetivo foram estudados cinco perfis as margens do rio Solimões, localizado no Município de Iranduba (AM). As informações obtidas permitiram determinar que o Neossolo Flúvico da área de estudo possui condições favoráveis ao cultivo apresentando uma média de pH 6,2, com altos teores de Ca, Mg, K, P, micronutrientes e zero conteúdo de Al, com elevados teores de C e M.O nas primeiras camadas e um decréscimo em profundidade. Dessa forma, o Neossolo Flúvico foi caracterizado como Tb Eutrófico, apresentando saturação por base acima de 50%, com boa CTC. A mineralogia mostrou-se homogênea em todos os perfis, com predominância dos minerais primários: Quartzo, Albite e Rutilo, com baixas proporções de minerais de argila Muscovita, Caulinita, interestratificado Muscovita-Ilita e Ilita. Palavras chave: Mineralogia, Química, Terras Caídas. ABSTRACT:The study about the mineralogical and chemical lowland soils generate information to compose a current survey about the susceptibility of lowland soil to process Fallen Lands. With this purpose we studied five profiles the banks of the Solimões River, located in the municipality of Iranduba (AM). The information obtained allowed to determine the Neosoil Fluvic the study area has favorable conditions for cultivation with an average pH of 6.2, with high levels of Ca, Mg, K, P, micronutrients and zero Al content, with high levels of C and M. O. in the first layer and a decrease in depth. Thus, Neosoil Fluvic was characterized as Tb eutrophic, with base saturation above 50%, with good CTC. The mineralogy was homogeneous in all profiles, with a predominance of primary minerals: Quartz, Albite and rutile, with low proportions of clay minerals Muscovite, Kaolinite, Muscovite-Illite interstratified and Illite.
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