Title:	Methods of soil organic carbon determination in Brazilian savannah soils.
Authors:	SATO, J. H. FIGUEIREDO, C. C. de MARCHÃO, R. L. MADARI, B. E. BENEDITO, L. E. C. BUSATO, J. G. SOUZA, D. M. de
Affiliation:	JULIANA HIROMI SATO, UNB; CÍCERO CÉLIO DE FIGUEIREDO, UNB; ROBELIO LEANDRO MARCHAO, CPAC; BEATA EMOKE MADARI, CNPAF; LUIZ EDUARDO CELINO BENEDITO, UNB; JADER GALBA BUSATO, UNB; DIEGO MENDES DE SOUZA, CNPAF.
Date Issued:	2014
Citation:	Scientia Agricola, Piracicaba, v. 71, n. 4, p. 302-308, July/Aug. 2014.
Description:	Several methods exist for determining soil organic carbon, and each one has its own advantages and limitations. Consequently, a comparison of the experimental results obtained when these methods are employed is hampered, causing problems in the comparison of carbon stocks in soils. This study aimed at evaluating the analytical procedures used in the determination of carbon and their relationships with soil mineralogy and texture. Wet combustion methods, including Walkley-Black, Mebius and Colorimetric determination as well as dry combustion methods, such as Elemental and Gravimetric Analysis were used. Quantitative textural and mineralogical (kaolinite, goethite and gibbsite) analyses were also carried out. The wet digestion methods underestimated the concentration of organic carbon, while the gravimetric method overestimated. Soil mineralogy interfered with the determination of carbon, with emphasis on the gravimetric method that was greatly influenced by gibbsite.
Thesagro:	Cerrado Solo orgânico Carbono Matéria orgânica
NAL Thesaurus:	Soil organic matter Carbon Combustion
ISSN:	0103-9016
DOI:	10.1590/0103-9016-2013-0306
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (CNPAF)