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| 18. |  | COCHRANE, T. T.; SANCHEZ, L. G.; AZEVEDO, L. G. de; PORRAS, J. A.; GARVER, C. L. Land in tropical America: guide to climate, landscapes, and soils for agronomists in Amazonia, the Andean Peidmont, Central Brazil in Orinoco. La tierra en America Tropical. A terra na America Tropical. Cali: CIAT/EMBRAPA-CPAC, 1985. 3v. il.| Biblioteca(s): Embrapa Recursos Genéticos e Biotecnologia. |
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| 19. | | COCHRANE, T. T.; SANCHEZ, L. G.; AZEVEDO, L. G. de; PORRAS, J. A.; GARVER, C. L. Land in tropical america: a guide to climate, landscapes, and soils for agronomists in Amazonia, the Andean Piedmont, Central Brazil and Orinoco. Cali: CIAT / Planaltina: EMBRAPA-CPAC, 1985. 3v., 2pt. Contem um mapa.| Biblioteca(s): Embrapa Hortaliças. |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Cerrados. Para informações adicionais entre em contato com cpac.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
08/01/1999 |
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Data da última atualização: |
08/01/1999 |
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Autoria: |
COCHRANE, T. T.; SOUZA, S, D. M. G. de. |
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Título: |
Measuring surface charge characteristics in oxisols and ultisols. |
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Ano de publicação: |
1985 |
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Fonte/Imprenta: |
Soil Science, Baltimore, v.140, n.3, p.223-229, 1985. |
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Idioma: |
Inglês |
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Notas: |
D.M.G. de Sousa. |
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Conteúdo: |
In this paper, we describe a method for measuring cation and anion exchange capacities (CEC, AEC) and both exchangeable cations and anions in low-activity clay soils, using NH4NO3 solutions; CEC and AEC are determined by equilibranting soil with solution strenghts that reflect field conditions, as indicated by osmotic potential measurements. Comparative analyses illustrate that the inicial 5.0 M NH4NO3 extraction provides an effective alternative to routine exchangeable cation, anion, and Al analyses. The methodology is simple, sensitive, and suitable for studying the effect of C1 and SO4 on the surface charge characteristics of Oxisols and Ultisols. |
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Palavras-Chave: |
Brasil; Ion exchange capacity. |
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Thesagro: |
Anion; Capacidade de Troca; Cátion; Cerrado; Oxisol. |
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Thesaurus NAL: |
anions; Brazil; cations; Ferralsols; soil. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01381naa a2200289 a 4500
001 1544463
005 1999-01-08
008 1985 bl --- 0-- u #d
100 1 $aCOCHRANE, T. T.
245 $aMeasuring surface charge characteristics in oxisols and ultisols.
260 $c1985
500 $aD.M.G. de Sousa.
520 $aIn this paper, we describe a method for measuring cation and anion exchange capacities (CEC, AEC) and both exchangeable cations and anions in low-activity clay soils, using NH4NO3 solutions; CEC and AEC are determined by equilibranting soil with solution strenghts that reflect field conditions, as indicated by osmotic potential measurements. Comparative analyses illustrate that the inicial 5.0 M NH4NO3 extraction provides an effective alternative to routine exchangeable cation, anion, and Al analyses. The methodology is simple, sensitive, and suitable for studying the effect of C1 and SO4 on the surface charge characteristics of Oxisols and Ultisols.
650 $aanions
650 $aBrazil
650 $acations
650 $aFerralsols
650 $asoil
650 $aAnion
650 $aCapacidade de Troca
650 $aCátion
650 $aCerrado
650 $aOxisol
653 $aBrasil
653 $aIon exchange capacity
700 1 $aSOUZA, S, D. M. G. de
773 $tSoil Science, Baltimore$gv.140, n.3, p.223-229, 1985.
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