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	Provedor de dados BABT (1) Autor Franchini,Júlio C. (1) Miyazawa,Mário (1) Pavan,Marcos A. (1) Ziglio,Cláudio O. (1) Palavra-chave Acid soils (1) Aluminum (1) Coprecipitation (1) Liming (1) Tipo do documento Info:eu-repo/semantics/article (1) Ano 2001 (1) País Brazil (1) Idioma Inglês (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 1 Primeira ... 1 ... Última Reduction of exchangeable calcium and magnesium in soil with increasing pH BABT Miyazawa,Mário; Pavan,Marcos A.; Ziglio,Cláudio O.; Franchini,Júlio C.. A laboratory study was conducted with soil samples and synthetic solutions to investigate possible mechanisms related with reduction in KCl exchangeable Ca and Mg with increasing pH. Increasing soil pH over 5.3 with CaCO3 added to the soil and with NaOH solution added to soil/KCl suspension increased adsorptions of Ca and Mg. The reduction of Mg was greater than Ca and was related to the concentration of soil exchangeable Al. The decreases of soluble Ca and Mg following addition of Al in synthetic solution were at pH > 7.5. The isomorphic coprecipitation reaction with Al compounds may be the most possible mechanism responsible for the decrease of exchangeable Ca and Mg with increasing pH. Possible chemical reactions are presented. Tipo: Info:eu-repo/semantics/article Palavras-chave: Coprecipitation; Aluminum; Liming; Acid soils. Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132001000200007 Registros recuperados: 1 Primeira ... 1 ... Última

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