Organic Carbon Determination by the Walkley-Black and Dry Combustion Methods in SurfaceSoils and Andept Profiles from Costa Rica

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dc.creatorBornemisza Steiner, Elemer
dc.creatorConstenla Umaña, Manuel Arturo
dc.creatorAlvarado, A.
dc.creatorOrtega, J.
dc.creatorVasquez, J.
dc.date.accessioned2022-12-16T15:22:04Z
dc.date.available2022-12-16T15:22:04Z
dc.date.issued1979-01
dc.descriptionEste artículo pertenece a la División S-3 -Microbiología y bioquímica de suelos de la Revista Soil Science Society of Americaes_ES
dc.description.abstractThe efficiency of oxidation of organic C by the Walkley-Black method was studied by comparing with determinations using dry combustion equipment and gravimetric determination for the evolved CO2. Fifty surface soils (0-30 cm) were studied, in groups of 10, each one belonging to one of the following taxonomic suborders: fluvents, Andepts, Tropepts, Udults and Ustults. Samples from 17 Andepts profiles were also analysed to study changes of oxidation efficiency with depth. The results for the surface samples indicated that the commonly used conversion factor was somewhat too small. It is recommended that 75% oxidation be used as the base for conversion to total C, as 86% of the studied samples deviated in <2% from this value. It was observed that the organic matter in the deeper horizons is more easily oxidized through the Walkley-Black procedure, perhaps because plant residues are less abundant and there is an accumulation of fulvic acids. In some cases the oxidation is almost complete. This oxidation is rather variable and it was not correlated with the texture or pH of these soils. It is believed that the extent of oxidizability can allow conclusions on the relative age of horizons in Andept profiles and indicates the presence of buried horizons.es_ES
dc.description.procedenceUCR::Vicerrectoría de Docencia::Ciencias Básicas::Facultad de Ciencias::Escuela de Químicaes_ES
dc.identifier.citationhttps://acsess.onlinelibrary.wiley.com/doi/epdf/10.2136/sssaj1979.03615995004300010014xes_ES
dc.identifier.doi10.2136/sssaj1979.03615995004300010014x
dc.identifier.issn1435-0661
dc.identifier.urihttps://hdl.handle.net/10669/87955
dc.language.isoenges_ES
dc.rightsacceso embargado
dc.sourceSoil Science Society of America Journal, vol.43 (1),pp.78-83.es_ES
dc.subjectSUELOes_ES
dc.subjectQUÍMICAes_ES
dc.subjectCOSTA RICAes_ES
dc.subjectQUÍMICA ORGÁNICAes_ES
dc.subjectTIPOLOGÍAes_ES
dc.titleOrganic Carbon Determination by the Walkley-Black and Dry Combustion Methods in SurfaceSoils and Andept Profiles from Costa Ricaes_ES
dc.typeartículo originales_ES

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