Data/hora: 13/06/2024 20:33:41

Provedor de dados: | 90
País: | Brazil
Título: | Comparison of H/Al stoichiometry of mineral and organic soils in Brazil
Autores: | Perez,Daniel Vidal; Anjos,Lúcia Helena Cunha dos; Ebeling,Adierson Gilvani; Pereira,Marcos Gervasio.
Data: | 2009-08-01
Ano: | 2009
Palavras-chave: | Acid-base titration; ICP-OES; KCl; Histosols.
Resumo: | Exchangeable Al has been used as a criterion for the calculation of lime requirement in several Brazilian States. However, the laboratory method with extraction by a 1 mol L-1 KCl solution followed by indirect alkaline titration is not accurate for some Brazilian soils, mainly in the case of soils with high organic matter content. The objective of this study was therefore to evaluate the stoichiometry of H+/Al3+ in KCl soil extracts. The results suggested that organically complexed Al is the main contributor to exchangeable acidity in soils enriched with organic matter. Liming recommendations for organic soils based exclusively on exchangeable Al determined by the NaOH titration method should therefore be revised.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832009000400031
Editor: | Sociedade Brasileira de Ciência do Solo
Relação: | 10.1590/S0100-06832009000400031
Formato: | text/html
Fonte: | Revista Brasileira de Ciência do Solo  v.33 n.4 2009
Fonte: | info:eu-repo/semantics/openAccess