Data/hora: 20/06/2024 15:55:05

Biblioteca(s): | Embrapa Amazônia Oriental; Embrapa Unidades Centrais.
Data corrente: | 03/08/2001
Data da última atualização: | 22/01/2021
Autoria: | KITAGAWA, Y.; MOLLER, M. R. F.
Afiliação: | YASUO KITAGAWA, NATIONAL INSTITUTE OF AGRICULTURAL SCIENCES; MARIA REGINA FREIRE MOLLER, CPATU.
Título: | Clay mineralogy of some typical soils in the Brazilian Amazon Region.
Ano de publicação: | 1979
Fonte/Imprenta: | Pesquisa Agropecuária Brasileira, Brasília, DF, v. 14, n. 3, p. 201-228, jul. 1979.
Idioma: | Inglês
Conteúdo: | Thee outline ofthe mineral composition in the clay fraction of some typical soils oecuring in the Brazilian Amazon region is as follows: In the sofis with oxic B horizon, Yellow Latosols, Red-Yellow Latosols and `Latosols Roxo` Soil, kaolinite is predominant, goethite and haernatite are found in general, an gibbsite is frequently detected. A small amount or trace of mica minerals occur in several lateritic sofis. The presence of the other 2:1-type elay minerals is rare in the lateritic soils. In Red-Ye1Iow Podzolic soils, kaolinite is also predominant, and iron-oxide míncrals are always identified. Considerable arnount of gibbsite and small amounts of mica minerals and dioctahedral vermiculíte are present in some of these soils. In the so-called -Terra Roxa Estruturada` soils, kaolin minerals are dominant, but considerable amounts of iron-oxide minerals are found in the clay fraction, so that haernatite is especially rich. Metahalloysite is a dominant clay mineral in a `Terra Roxa Estruturada` Soil. A small amount of dioctahedral vermiculite is present in the other soils. The clay mineral composítion of the low land sofis is a little complicated. MontmorWoniteldioetahedral-vermiculite interstratified mineral and mica minerals are dominant in two Low-Hurnic Gley soils and a Ground-Water Laterite soils, respectively, although kaolin minerals are predominant in many lowland soils. Small arnounts of 2:1-type clay minerals are frequently detected in the other lowland soils. Quartz exists in the clay fraction of all the soil samples.
Palavras-Chave: | Amazon soil; Mineralogia de argila em solo; soil clay mineralogy; Solo da Amazônia.
Thesagro: | Argila; Química do Solo; Solo.
Categoria do assunto: | --
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/197876/1/Clay-mineralogy-of-sme-typical.pdf
Registro original: | Embrapa Amazônia Oriental (CPATU)

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