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Registro Completo
Biblioteca(s):  Embrapa Cerrados; Embrapa Semiárido; Embrapa Solos.
Data corrente:  26/07/1996
Data da última atualização:  22/05/2000
Autoria:  MONIZ, A. C.
Título:  Formation of an oxisol-ultisol transition in Sao Paulo, Brazil.
Ano de publicação:  1980
Fonte/Imprenta:  Raleigh: North Carolina State University, 1980.
Páginas:  290p.
Idioma:  Inglês
Notas:  PhD.Thesis.
Conteúdo:  This study of an Oxisol-Ultisol transition allowed the development of a double-water flow model as the most important single factor in explaining the formation of soil structure as well as controlling the chemical and mineralogical transformation that occur during the soil development. According to this view, soil development results from the action of both lateral - and base-water flow, integrated in the landscape, rather than the classic vertical interpretation of soil development. The argillic horizon is formed inside a layer having a blocky structure which runs along the sloping portions of both the Itatiba and Mogi Guacu toposequences and thickens gradually downslope. This blocky structured layer is affected mainly by the lateral-water flow and its soil structure is formed by wetting and drying cycles. This layer, with higher bulk density than the oxic material underlying it, is interpreted to be compressed or consolidated by desiccation, according to soil mechanics terminology. The formation of a blocky structure from a fine granular structure represents the first step in the compression process. Prismatic and columnar structures are formed as the compression progresses toward the shrinkage limit of a particular texture. Further modifications in the structure result in the formation of a sepic plasmic fabric where soil materials have crystalline swelling. Clay arrangement, starting at the ped surface when compression is low, extends inside the ped when compressi... Mostrar Tudo
Palavras-Chave:  Brasil; Formacao; Mineralogical transformation; Sao Paulo; Soil chemicophysical properties; Solos; Structure; Utisol.
Thesagro:  Água; Estrutura do Solo; Oxisol; Solo; Ultissolo.
Thesaurus Nal:  Acrisols; classification; Ferralsols; soil; soil structure; water.
Categoria do assunto:  --
Marc:  Mostrar Marc Completo
Registro original:  Embrapa Cerrados (CPAC)
Biblioteca ID Origem Tipo/Formato Classificação Cutter Registro Volume Status URL
CNPS4143 - 1ADDTS - --80011MON/801997.00871
CPAC16454 - 1ADDTS - --T050/80MONT050/80
CPATSA24594 - 1ADDTS - PP63/19801980.00063
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