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Registro Completo |
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Biblioteca(s): |
Embrapa Hortaliças. |
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Data corrente: |
30/11/1993 |
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Data da última atualização: |
30/11/1993 |
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Autoria: |
CARNEIRO, R. M. D. G. |
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Afiliação: |
Caixa Postal, 403 - 96001-00 Pelotas, RS. |
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Título: |
Ocorrencia de Meloidogyne javanica e M. arenaria em tres cultivares de alcachofra (Cynara scolines). |
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Ano de publicação: |
1992 |
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Fonte/Imprenta: |
Nematologia Brasileira, Piracicaba, v.16, n.1/2, p.89, 1992. |
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ISSN: |
0102-2997 |
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Idioma: |
Português |
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Notas: |
Resumo. |
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Palavras-Chave: |
Artichoke; Disease; Nematode; Ocorrencia. |
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Thesagro: |
Doença; Nematóide. |
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Thesaurus Nal: |
occurrence. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 00605naa a2200217 a 4500
001 1750790
005 1993-11-30
008 1992 bl uuuu u00u1 u #d
022 $a0102-2997
100 1 $aCARNEIRO, R. M. D. G.
245 $aOcorrencia de Meloidogyne javanica e M. arenaria em tres cultivares de alcachofra (Cynara scolines).
260 $c1992
500 $aResumo.
650 $aoccurrence
650 $aDoença
650 $aNematóide
653 $aArtichoke
653 $aDisease
653 $aNematode
653 $aOcorrencia
773 $tNematologia Brasileira, Piracicaba$gv.16, n.1/2, p.89, 1992.
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Embrapa Hortaliças (CNPH) |
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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: |
15/07/1999 |
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Data da última atualização: |
15/07/1999 |
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Autoria: |
WESTERHOF, R.; BUURMAN, P.; GRIETHUYSEN, C. van; AYARZA, M. A.; VILELA, L.; ZECH, W. |
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Título: |
Aggregation studied by laser diffraction in relation to plowing, soil organic matter, and lime 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.64-76. |
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Idioma: |
Inglês |
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Conteúdo: |
In the Cerrados, a large savanna region in Brazil, the effects of different land use on aggregation in Oxisols were studied, using laser diffraction grainsize analysis. The topsoil of plowed systems had significantly fewer macroaggrehates (194-2000 um) and a significantly larger fraction of microaggregates and primary particles (<76 um) than did pastures and native savanna. In plowed systems that were low in soil organic carbon (SOC), lime negatively affected aggregate stability. Lime addition had no effect on topsoil aggregation in land-use systems that were irregularly plowed and generally had a higher SOC content. For all the studied topsoils, pHKCl was positively correlated with the amount of clay dispersed after 3 h of shaking in water. Soil organic carbon did not influence clay dispersion in the range of soils studied. In continuous cropping systems in the Cerrados, a combination of mechanical stress, low SOC, and liming will increase the number of small aggregates and primary particles and hence contribuite to destabilizing the soil structure. |
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Palavras-Chave: |
Ploughing. |
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Thesagro: |
Aradura; Calagem; Cerrado; Estrutura do Solo; Matéria Orgânica. |
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Thesaurus NAL: |
liming; organic matter; soil structure. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02027naa a2200301 a 4500
001 1545399
005 1999-07-15
008 1999 bl uuuu u00u1 u #d
100 1 $aWESTERHOF, R.
245 $aAggregation studied by laser diffraction in relation to plowing, soil organic matter, and lime in the Brazilian cerrados.
260 $c1999
300 $ap.64-76.
520 $aIn the Cerrados, a large savanna region in Brazil, the effects of different land use on aggregation in Oxisols were studied, using laser diffraction grainsize analysis. The topsoil of plowed systems had significantly fewer macroaggrehates (194-2000 um) and a significantly larger fraction of microaggregates and primary particles (<76 um) than did pastures and native savanna. In plowed systems that were low in soil organic carbon (SOC), lime negatively affected aggregate stability. Lime addition had no effect on topsoil aggregation in land-use systems that were irregularly plowed and generally had a higher SOC content. For all the studied topsoils, pHKCl was positively correlated with the amount of clay dispersed after 3 h of shaking in water. Soil organic carbon did not influence clay dispersion in the range of soils studied. In continuous cropping systems in the Cerrados, a combination of mechanical stress, low SOC, and liming will increase the number of small aggregates and primary particles and hence contribuite to destabilizing the soil structure.
650 $aliming
650 $aorganic matter
650 $asoil structure
650 $aAradura
650 $aCalagem
650 $aCerrado
650 $aEstrutura do Solo
650 $aMatéria Orgânica
653 $aPloughing
700 1 $aBUURMAN, P.
700 1 $aGRIETHUYSEN, C. van
700 1 $aAYARZA, M. A.
700 1 $aVILELA, L.
700 1 $aZECH, W.
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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