Data/hora: 07/06/2024 11:25:19

Biblioteca(s): | Embrapa Solos; Embrapa Solos / UEP-Recife.
Data corrente: | 22/11/2002
Data da última atualização: | 22/11/2002
Autoria: | CURI, N.
Título: | Lithosequence and toposequence of oxisols from Goias and Minas Gerais States, Brazil.
Ano de publicação: | 1983
Fonte/Imprenta: | [s.l.]: Purdue University, 1983.
Páginas: | 158p.
Idioma: | Inglês
Notas: | A thesis submitted to the faculty of Purdue University in partial fulfillment of the requirements for the degree of Doctor of Philosophy.
Conteúdo: | A toposequence of soils developed from basaltic material from the Central Plateau of Brazil (Itumbiara, Goias State) and a pedon from the Quadrilatero Ferrifero (Minas Gerais State) were sampled. Soil materials from Oxisols from other regions of the country were also used in this study for comparative purposes. The relationship between landscape position (independent variable) and soil color and magnetic attraction (dependent variables) was the critical factor in determinig the sampling places within basaltic toposequence. A fresh basaltic rock (12 m deep) and itabiritic rocks in different weathering stages (hard and soft rocks) were also sampled for characterization. Physical analyses, CBD, ICP, PIXE, P adsortion and desorption, optical identification, XRD,DXRD for Fe oxides, SEM-EDAX, TEM, DTA, IR nad magnetic susceptibility measurements were carried out in the laboratory. The lithosequence study revealed that the effect of the parent material was still evident even in highly weathered soils. The basalt-derived Oxisols behave much differently from the itabirite-derived Oxisol in terms of physical, morphological, chemical and mineralogical properties and thus they should logically be separated into two distinct soil classes. Perhaps Fe content, Ti content, and magnetic susceptibility, all of wich reflect the original parent material, should be the differentiating charactersitics whereas particle density, amount of trace elements and capacity to fix phosphorus would be accessory properties. A breaking point (...)
Palavras-Chave: | Brasil; Caracterizacao; Goias; Minas Gerais; Solos.
Thesagro: | Física; Geomorfologia; Mineralogia; Química; Solo.
Thesaurus Nal: | Brazil; chemistry; soil.
Categoria do assunto: | --
Registro original: | Embrapa Solos (CNPS)

Exemplares:

CNPS - (4074-1) - ADD - TS - -- - 83004 - CUR/83 - 1997.00540 - DIS
CNPS-UEPR - (2296-1) - ADD - TS - PP - 631.44 - C975l - 2016.02436 - DIS