Data/hora: 12/06/2024 06:00:01

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)	
Exemplares: 	AI-SEDE - (20421-1) - UPE - AP - PP - 630.72081 - P474 -  - DIS
CPATU - (55330-1) - UPC - AP - PP - 630.5 - P472 -  - DIS