Data/hora: 01/06/2024 15:47:01

Provedor de dados: | 63
País: | Brazil
Título: | Causes of morphological discontinuities in soils of Depressão Central, Rio Grande do Sul State, Brazil
Autores: | Michelon,Cristiane Regina; Azevedo,Antonio Carlos de; Pedron,Fabrício de Araújo; Dalmolin,Ricardo Simão Diniz; Stürmmer,Sidinei Klochnner; Gonçalves,Juliana; Jesus,Sérgio Luis de.
Data: | 2010-01-01
Ano: | 2010
Palavras-chave: | Soil morphology; Subtropical soils; Soil discontinuity.
Resumo: | Morphological, particularly textural, discontinuities between horizons increase soil erodibility in Depressão Central, Rio Grande do Sul State (Brazil). Characterization of such discontinuities would help to understand landscape evolution and to model near-surface hydrology. The objective of this research was to explore the relationship between morphological discontinuity and deposition of transported materials during pedogenesis. Transported material was meant to be mineral particles found in the soil profile, transported probably by water or gravity, that were not present neither in the parent material nor derived from it. Five soils of this region (two Alfisols, two Ultisols and one Mollisol) were sampled and morphological, sand grain size statistics, chemical and mineralogical analyses were used to search for evidences of deposition of transported materials. Two soils had abrupt textural change but no evidence of deposition of transported materials, two soils had less contrasting morphology and some characteristics that are possibly related to deposition, and one soil had no morphological discontinuity, but had deposition of material enriched in magnetite-maghemite in the sand fraction of the A horizon. Therefore, there were no relationship between morphological discontinuity and deposition of transported materials for these profiles in the Depressão Central.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162010000300010
Editor: | São Paulo - Escola Superior de Agricultura "Luiz de Queiroz"
Relação: | 10.1590/S0103-90162010000300010
Formato: | text/html
Fonte: | Scientia Agricola  v.67 n.3 2010
Fonte: | info:eu-repo/semantics/openAccess