skip to main content
Idioma:
Primo Advanced Search
Primo Advanced Search Query Term
Primo Advanced Search prefilters
Busca Simples

Sombric-like horizon and xanthization in polychrome subtropical soils from Southern Brazil: implications for soil classification

Chiapini, Mariane; Oliveira Junior, Jairo Calderari De; Schellekens, Judith; Almeida, Jaime Antonio De; Buurman, Peter; Vidal-Torrado, Pablo

Scientia Agricola; v. 78 n. 4 (2021); e20190115

Universidade de São Paulo. Escola Superior de Agricultura Luiz de Queiroz 2021-03-23

Acesso online

  • Título:
    Sombric-like horizon and xanthization in polychrome subtropical soils from Southern Brazil: implications for soil classification
  • Autor: Chiapini, Mariane; Oliveira Junior, Jairo Calderari De; Schellekens, Judith; Almeida, Jaime Antonio De; Buurman, Peter; Vidal-Torrado, Pablo
  • Assuntos: Argissolos; Goethite; Dark Subsurface Horizon; Shiny Peds; Matte Aggregate Faces
  • É parte de: Scientia Agricola; v. 78 n. 4 (2021); e20190115
  • Descrição: The occurrence of dark subsurface horizons rich in organic matter (OM) associated with polychrome in the B horizon (yellowish over reddish hue) is common in soils from Southern Brazil. The formation of these horizons and the combination with such morphological attributes has not been properly documented, and neither has the cause effect relationship. Four soil profiles with such sombric-like horizons with a yellowish color at the upper part of the B horizon over red subsoil were studied in Southern Brazil. Results from micromorphology, extractable sesquioxide minerals, clay mineralogy and isomorphic substitution of Fe by Al in iron minerals showed that melanization, xanthization, bioturbation, moderate shrinking/swelling and moderate ferralitization were the most evident pedogenetic processes in role. Xanthization is closely related to the sombric-like horizon formation. In the studied area the findings demonstrated that no clay and OM illuviation had taken place. Therefore, the classification of these soils was revisited, so as to take into account the processes that underlie their genesis with emphasis on xanthization, clay illuviation and soil aggregation. The results suggest that the sombric horizon may need redefinition, unless profiles can be found in which illuviation of clay and/or OM can be proven.
  • Títulos relacionados: https://www.revistas.usp.br/sa/article/view/183582/170123
  • Editor: Universidade de São Paulo. Escola Superior de Agricultura Luiz de Queiroz
  • Data de criação/publicação: 2021-03-23
  • Formato: Adobe PDF
  • Idioma: Inglês
Links
Voltar para lista de resultados
Ir para página anteriorAnterior Resultado  5 AvançarIr para próxima página

  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

Buscando em bases de dados remotas. Favor aguardar.