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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
08/06/1995 |
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Data da última atualização: |
08/06/1995 |
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Autoria: |
BIGHAM, J. M.; GOLDEN, D. C.; BUOL, S. W.; WEED, S. B.; BOWEN, L. H. |
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Título: |
Iron oxide mineralogy of well-drained ultisols and oxisols: II. Influence on color, surface area, and phosphate retention. |
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Ano de publicação: |
1978 |
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Fonte/Imprenta: |
Soil Science Society of America Journal, v.42, p.825-829, 1978. |
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Idioma: |
Inglês |
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Conteúdo: |
Subsoil samples from selected North Carolina Ultisols and Brazilian Oxisols were analyzed to determine how the colors of these materials were influenced by the nature and distribution of their constituent iron oxides. The effects of extraneous variables, i.e., other than the iron oxides, were minimized by utilizing pairs of red and yellow soils that were otherwise similar in their physical, morphological, and mineralogical properties. The iron oxides were found to be concentrated in the <0.2- um fractions, and the colors of these clays were the same as or similar to those of the parent soils. The spectral properties of the <0.2- um clays were primarily influenced by iron mineralogy. Goethite or mixtures of goethite and hematite were identified in all of the clays; however, Mossbauer analyses indicated that the red members of all sample pairs contained larger proportions of hematite than did their yellow counterparts. In addition, as the clays became redder in hue, the ratio of hematite to goethite generally increased. Calculated surface areas for the iron oxides ranged from 60 to 200 m2/g; values from the yellow clays were consistently higher than those obtained from their red counterparts. The yellow clays were also more efficient adsorbers of phosphate. |
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Palavras-Chave: |
Fertility. |
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Thesagro: |
Fertilidade; Oxido de Ferro; Solo. |
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Thesaurus Nal: |
goethite; hematite; iron oxides; Mossbauer spectroscopy; soil. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02047naa a2200277 a 4500
001 1784427
005 1995-06-08
008 1978 bl --- 0-- u #d
100 1 $aBIGHAM, J. M.
245 $aIron oxide mineralogy of well-drained ultisols and oxisols$bII. Influence on color, surface area, and phosphate retention.
260 $c1978
520 $aSubsoil samples from selected North Carolina Ultisols and Brazilian Oxisols were analyzed to determine how the colors of these materials were influenced by the nature and distribution of their constituent iron oxides. The effects of extraneous variables, i.e., other than the iron oxides, were minimized by utilizing pairs of red and yellow soils that were otherwise similar in their physical, morphological, and mineralogical properties. The iron oxides were found to be concentrated in the <0.2- um fractions, and the colors of these clays were the same as or similar to those of the parent soils. The spectral properties of the <0.2- um clays were primarily influenced by iron mineralogy. Goethite or mixtures of goethite and hematite were identified in all of the clays; however, Mossbauer analyses indicated that the red members of all sample pairs contained larger proportions of hematite than did their yellow counterparts. In addition, as the clays became redder in hue, the ratio of hematite to goethite generally increased. Calculated surface areas for the iron oxides ranged from 60 to 200 m2/g; values from the yellow clays were consistently higher than those obtained from their red counterparts. The yellow clays were also more efficient adsorbers of phosphate.
650 $agoethite
650 $ahematite
650 $airon oxides
650 $aMossbauer spectroscopy
650 $asoil
650 $aFertilidade
650 $aOxido de Ferro
650 $aSolo
653 $aFertility
700 1 $aGOLDEN, D. C.
700 1 $aBUOL, S. W.
700 1 $aWEED, S. B.
700 1 $aBOWEN, L. H.
773 $tSoil Science Society of America Journal$gv.42, p.825-829, 1978.
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Registro original: |
Embrapa Pantanal (CPAP) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Algodão. Para informações adicionais entre em contato com cnpa.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Algodão. |
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Data corrente: |
12/01/2009 |
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Data da última atualização: |
22/06/2009 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
OLIVEIRA, M. I. P. de; LUCENA, A. M. A. de; TAVARES, M. J. V.; BRITO, G. G. de; LIMA, V. L. A. de; BELTRÃO, N. E. de M. |
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Afiliação: |
Maria Isaura P. de Oliveira, UFCG; Amanda Micheline A. de Lucena, UFCG; Maria José V. Tavares, UFCG; Giovani G. Brito, Embrapa Algodão; Vera Lúcia A. de Lima, UFCG; Napoleão Esberard de Macêdo Beltrão, Embrapa Algodão. |
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Título: |
Conteúdo de açúcares e amido em folhas de mamoneira oriundas de sementes tratadas com cloreto de Mepiquat. |
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Ano de publicação: |
2008 |
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Fonte/Imprenta: |
In: CONGRESSO BRASILEIRO DE MAMONA, 3., 2008, Salvador. Energia e ricinoquímica: resumos. Salvador: SEAGRI: Embrapa Algodão, 2008. |
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Páginas: |
p. 49 |
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Idioma: |
Português |
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Palavras-Chave: |
Componente bioquímico. |
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Thesagro: |
Regulador de Crescimento; Ricinus Communis. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 00765naa a2200217 a 4500
001 1277001
005 2009-06-22
008 2008 bl uuuu u00u1 u #d
100 1 $aOLIVEIRA, M. I. P. de
245 $aConteúdo de açúcares e amido em folhas de mamoneira oriundas de sementes tratadas com cloreto de Mepiquat.
260 $c2008
300 $ap. 49
650 $aRegulador de Crescimento
650 $aRicinus Communis
653 $aComponente bioquímico
700 1 $aLUCENA, A. M. A. de
700 1 $aTAVARES, M. J. V.
700 1 $aBRITO, G. G. de
700 1 $aLIMA, V. L. A. de
700 1 $aBELTRÃO, N. E. de M.
773 $tIn: CONGRESSO BRASILEIRO DE MAMONA, 3., 2008, Salvador. Energia e ricinoquímica: resumos. Salvador: SEAGRI: Embrapa Algodão, 2008.
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