Data/hora: 13/06/2024 01:13:40

Provedor de dados: | 90
País: | Brazil
Título: | Soil structure transformations from ferralic to nitic horizons on a toposequence in southeastern Brazil
Autores: | Cooper,Miguel; Vidal-Torrado,Pablo; Grimaldi,Michel.
Data: | 2010-10-01
Ano: | 2010
Palavras-chave: | Ferralsols; Nitisols; Soil micromorphology; Image analysis; Soil water dynamics.
Resumo: | The soil structure transformation from ferralic to nitic horizons was studied in a toposequence on quaternary red clayey sediments and diabase in Piracicaba (SP), Brazil. Morphological and micromorphological studies, image analysis, soil water characteristic curves and monitoring of (total) soil water potential head were used. The presence of polyconcave vughs, clayskins and planar voids shows that the vertical and lateral transition and structural transformation from ferralic to nitic horizons is given by the coalescence of the microaggregates, probably due to tensions created in a drier period in the past. Changes to a more humid climate with a defined dry season and alternate drying and wetting cycles resulted in the fissuration of the previously coalesced material, forming polyhedral aggregates and microaggregates. Simultaneously, clay illuviation filled the voids and together with the compacting action of the biological activity of these soils contributed to the coalescence of microaggregates.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832010000500021
Editor: | Sociedade Brasileira de Ciência do Solo
Relação: | 10.1590/S0100-06832010000500021
Formato: | text/html
Fonte: | Revista Brasileira de Ciência do Solo  v.34 n.5 2010
Fonte: | info:eu-repo/semantics/openAccess