Calcination as an alternative method to classify Spodosols on the second categorical level (Registro n. 330500)
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| 000 -LÍDER | |
|---|---|
| fixed length control field | 03183nab a2200265 i 4500 |
| 003 - CÓDIGO MARC DA AGÊNCIA CATALOGADORA | |
| Campo de controle | BR-BrBNA |
| 005 - DATA E HORA DA ÚLTIMA ATUALIZAÇÃO | |
| Campo de controle | 20250318164348.0 |
| 008 - CAMPO DE TAMANHO FIXO | |
| fixed length control field | 250318b2020 bl.ar|pooa||| 00| 0 eng | |
| 040 ## - FONTE DA CATALOGAÇÃO | |
| Agência catalogadora | BR-BrBNA |
| Idioma da catalogação | eng |
| 072 ## - CATEGORIA AGRIS | |
| Código AGRIS | P32 |
| 072 ## - CATEGORIA AGRIS | |
| Código AGRIS | P33 |
| 100 ## - ENTRADA PRINCIPAL - NOME PESSOAL | |
| Nome pessoal | Heberle, Daniel Alexandre |
| 100 ## - ENTRADA PRINCIPAL - NOME PESSOAL | |
| Nome pessoal | Almeida, Jaime Antonio de |
| 100 ## - ENTRADA PRINCIPAL - NOME PESSOAL | |
| Nome pessoal | Torrado, Pablo Vidal |
| 245 ## - TÍTULO PRINCIPAL | |
| Título principal | Calcination as an alternative method to classify Spodosols on the second categorical level |
| 500 ## - NOTA GERAL | |
| Nota geral | Publicação on-line; 24 ref.; 3 illus; 3 tables; Sumaries (En) |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Koha item type | Analítica |
| 520 ## - NOTA DE RESUMO | |
| Nota de conteúdo | <br/><br/>ABSTRACT: The classification of Spodosols on the second categorical level (suborder), according to the Brazilian Soil Classification System (SiBCS), is done by observing the colors of genetic horizons in the field. The presence or absence of iron oxides is the main factor for this classification, and the color of the horizon is the criterion currently adopted. However, the simple observation of color in the field can be mistaken and cause an error in the definition of the second categorical level. This occurs when spodic horizons that do not contain iron oxides show high chroma color, or dark color due to the organic matter content, which masks the presence of iluviated Fe produced by podzolization. This can lead to errors, such as classifying Humiluvico horizons as Ferriluvico, and Ferri-humiluvico horizons as Humiluvico. These misunderstandings are currently solved through complex analyses using specific extractors and sophisticated equipment. Thus, obtaining a simple, fast, and inexpensive method to confirm the presence or absence of iron oxides in samples of spodic horizons is needed. This study tested an alternative method to assist in the determination of the second categorical level of the class of coastal plain Spodosols. The method consists of calcining samples in a muffle at 600 °C for 6 h. The calcination enabled to identify spodic horizons with and without presence of iron quickly; the result was compared with selective extraction analyses carried out using three different extractors: sodium pyrophosphate, ammonium acid oxalate, and sodium dithionite-citrate. The results obtained from these methods (calcination in muffle and selective extraction of iron oxides) enabled the identification of samples presenting colors varying from yellow to reddish, indicating the presence of iron, whereas those with the whitish color indicated absence or very low iron oxide levels. The 12 profiles of Spodosols were described and classified according to the SiBCS, and six profiles needed to be reclassified after the calcination procedure, which proved to be efficient.<br/><br/>Keywords: Podzol, spodic B horizon, soil classification, Podzolization. |
| 650 ## - ASSUNTO - THESAGRO | |
| Cabeçalho tópico ou nome geográfico | CLASSIFICAÇÃO DO SOLO |
| 650 ## - ASSUNTO - THESAGRO | |
| Cabeçalho tópico ou nome geográfico | ANÁLISE DO SOLO |
| 650 ## - ASSUNTO - THESAGRO | |
| Cabeçalho tópico ou nome geográfico | SANTA CATARINA |
| 773 0# - ENTRADA ANALÍTICA | |
| Host Biblionumber | 808 |
| Registro do item | 345421 |
| Imprenta | Viçosa-MG Sociedade Brasileira de Ciência do Solo 1977 |
| Outro identificador | 2024-5955 |
| Título | Revista Brasileira de Ciência do Solo (Brazil) |
| ISSN | 0100-0683 |
| Colação | v. 44 p. 1-15; (2020) |
| Número de controle de registro | BR2024004917 |
| 856 ## - ACESSO E ENDEREÇO ELETRÔNICO | |
| Identificador uniforme de recurso - URI | https://www.scielo.br/j/rbcs/a/QSjLBKJq4ftTtGpNZTtGBBw/?format=pdf&lang=en |
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