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Registro Completo |
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
15/07/1999 |
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Data da última atualização: |
15/07/1999 |
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Autoria: |
NEUFELDT, H. |
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Título: |
Physical and chemical properties of selected oxisols in the Brazilian cerrados. |
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Ano de publicação: |
1999 |
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Fonte/Imprenta: |
In: THOMAS, R.; AYARZA, M.A., ed. Sustainable land management for the oxisols of the Latin American savannas: dynamics of soil organic matter and indicators of soil quality. Cali: CIAT, 1999. |
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Páginas: |
p.37-50. |
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Idioma: |
Inglês |
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Conteúdo: |
Profiles of selected very fine, allitic, isohyperthermic, Anionic Acrustox and coarse-loamy, mixed, isohyperthermic, Typic Haplustox under different management systems were analyzed chemically and physically. On each of the two substrates, a conventional crop rotation, a degraded pastures, and a tree plantation were selected. Native savanna was used as control. Exhange capacity, most exchangeable cations, and phosphorus were selected. Native savanna was used as control. Exchange capacity, mosth exchangeable cations, and phosphorus were strongly related to soil organic carbon while pedogenic Fe and Al oxides were less related. Soil organic matter also controlled the formation of stable microaggregates and the degree of clay dispersion, and must therefore be seen as a key component in these soils. Management affected both the physical and chemical properties of the soils. Liming elevated the pH, increased the number of variable exchange sites, and altered clay flocculation. Such changes may have implications for pore-size distribution. Seedbed preparation resulted in soil compaction and reduced total pore volume. The loss was, however, restricted to macropores, whereas mesoporosity even increased. Given the small amount of capillary water available to plants in Oxisols, this change may be seen as positive. |
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Palavras-Chave: |
Propriedade fisico-quimica do solo; Soil chemicophysical properties. |
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Thesagro: |
Cerrado; Oxisol. |
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Thesaurus Nal: |
Ferralsols. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02016naa a2200193 a 4500
001 1545397
005 1999-07-15
008 1999 bl uuuu u00u1 u #d
100 1 $aNEUFELDT, H.
245 $aPhysical and chemical properties of selected oxisols in the Brazilian cerrados.
260 $c1999
300 $ap.37-50.
520 $aProfiles of selected very fine, allitic, isohyperthermic, Anionic Acrustox and coarse-loamy, mixed, isohyperthermic, Typic Haplustox under different management systems were analyzed chemically and physically. On each of the two substrates, a conventional crop rotation, a degraded pastures, and a tree plantation were selected. Native savanna was used as control. Exhange capacity, most exchangeable cations, and phosphorus were selected. Native savanna was used as control. Exchange capacity, mosth exchangeable cations, and phosphorus were strongly related to soil organic carbon while pedogenic Fe and Al oxides were less related. Soil organic matter also controlled the formation of stable microaggregates and the degree of clay dispersion, and must therefore be seen as a key component in these soils. Management affected both the physical and chemical properties of the soils. Liming elevated the pH, increased the number of variable exchange sites, and altered clay flocculation. Such changes may have implications for pore-size distribution. Seedbed preparation resulted in soil compaction and reduced total pore volume. The loss was, however, restricted to macropores, whereas mesoporosity even increased. Given the small amount of capillary water available to plants in Oxisols, this change may be seen as positive.
650 $aFerralsols
650 $aCerrado
650 $aOxisol
653 $aPropriedade fisico-quimica do solo
653 $aSoil chemicophysical properties
773 $tIn: THOMAS, R.; AYARZA, M.A., ed. Sustainable land management for the oxisols of the Latin American savannas: dynamics of soil organic matter and indicators of soil quality. Cali: CIAT, 1999.
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Registro original: |
Embrapa Cerrados (CPAC) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Hortaliças. Para informações adicionais entre em contato com cnph.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Hortaliças. |
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Data corrente: |
13/09/2004 |
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Data da última atualização: |
13/09/2004 |
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Autoria: |
LIMA, N. E.; SAMINÊZ, T. C. de O.; AYRES, J. J.; RESENDE, F. V. |
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Afiliação: |
Embrapa Hortaliças, Brasília, DF. |
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Título: |
Desempenho de cultivares de alface americana sob sistema orgânico de produção nas condições de cerrado. |
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Ano de publicação: |
2004 |
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Fonte/Imprenta: |
Horticultura Brasileira, Brasília, v. 22, n. 2, jul. 2004. Suplemento 2. |
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Descrição Física: |
CD-ROM. |
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Idioma: |
Português |
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Notas: |
Trabalho apresentado no 44º Congresso Brasileiro de Olericultura, 2004. Publicado também como resumo em: Horticultura Brasileira, Brasília, v. 22, n. 2, p. 354, jul. 2004. Suplemento 1. |
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Palavras-Chave: |
Agroecologia; Cultivo orgânico. |
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Thesagro: |
Alface; Lactuca Sativa. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 00830naa a2200217 a 4500
001 1774581
005 2004-09-13
008 2004 bl uuuu u00u1 u #d
100 1 $aLIMA, N. E.
245 $aDesempenho de cultivares de alface americana sob sistema orgânico de produção nas condições de cerrado.
260 $c2004
300 $cCD-ROM.
500 $aTrabalho apresentado no 44º Congresso Brasileiro de Olericultura, 2004. Publicado também como resumo em: Horticultura Brasileira, Brasília, v. 22, n. 2, p. 354, jul. 2004. Suplemento 1.
650 $aAlface
650 $aLactuca Sativa
653 $aAgroecologia
653 $aCultivo orgânico
700 1 $aSAMINÊZ, T. C. de O.
700 1 $aAYRES, J. J.
700 1 $aRESENDE, F. V.
773 $tHorticultura Brasileira, Brasília$gv. 22, n. 2, jul. 2004. Suplemento 2.
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