Data/hora: 10/06/2024 08:12:26

Biblioteca(s): 	Embrapa Cerrados.	
Data corrente: 	08/01/1999	
Data da última atualização: 	08/01/1999	
Autoria: 	COCHRANE, T. T.; SOUZA, S, D. M. G. de.	
Título: 	Measuring surface charge characteristics in oxisols and ultisols.	
Ano de publicação: 	1985	
Fonte/Imprenta: 	Soil Science, Baltimore, v.140, n.3, p.223-229, 1985.	
Idioma: 	Inglês	
Notas: 	D.M.G. de Sousa.	
Conteúdo: 	In this paper, we describe a method for measuring cation and anion exchange capacities (CEC, AEC) and both exchangeable cations and anions in low-activity clay soils, using NH4NO3 solutions; CEC and AEC are determined by equilibranting soil with solution strenghts that reflect field conditions, as indicated by osmotic potential measurements. Comparative analyses illustrate that the inicial 5.0 M NH4NO3 extraction provides an effective alternative to routine exchangeable cation, anion, and Al analyses. The methodology is simple, sensitive, and suitable for studying the effect of C1 and SO4 on the surface charge characteristics of Oxisols and Ultisols.	
Palavras-Chave: 	Brasil; Ion exchange capacity.	
Thesagro: 	Anion; Capacidade de Troca; Cátion; Cerrado; Oxisol.	
Thesaurus Nal: 	anions; Brazil; cations; Ferralsols; soil.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Cerrados (CPAC)	
Exemplares: 	CPAC - (1558-1) - UPC - SP - -- - CRI4819 -  - CRI4819 - DIS