Data/hora: 02/06/2024 03:34:44

Provedor de dados: 	52	
País: 	Brazil	
Título: 	Gravimetric determination of soil organic matter	
Autores: 	Miyazawa,M.; Pavan,M.A.; Oliveira,E.L. de; Ionashiro,M.; Silva,A.K.	
Data: 	2000-01-01	
Ano: 	2000	
Palavras-chave: 	Organic carbon; Thermogravimetry; Soil analysis.	
Resumo: 	Studies were carried out to evaluate a gravimetric method for the determination of soil organic matter by the mass loss at 300ºC. The gravimetric method was compared with Walkley-Black, using several brazilian soils with variable chemical and physical properties. Gravimetric method was positively correlated with Walkley-Black method with the following linear regression equation: y = 3.72x + 0.29, r = 0.94. The angular coefficient 3.72 for tropical soils was greater than those reported in the literature for temperate soils (from 1.68 to 2.13). The difference was due to greater oxidation degree of the organic matter. When compared with Walkley-Black method, gravimetric technique showed certain distinct advantages such as no environmental contamination with Cr6+ and improved laboratory safety eliminating the use of concentrated sulfuric acid.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132000000500005	
Editor: 	Instituto de Tecnologia do Paraná - Tecpar	
Relação: 	10.1590/S1516-89132000000500005	
Formato: 	text/html	
Fonte: 	Brazilian Archives of Biology and Technology  v.43 n.5 2000	
Fonte: 	info:eu-repo/semantics/openAccess