Resistência ao Cisalhamento de um Latossolo sob Diferentes uso e Manejo

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dc.contributor.authorSilva, Reginaldo Barboza da [UNESP]
dc.contributor.authorDias Junior, M. S.
dc.contributor.authorSantos, F. L.
dc.contributor.authorFranz, C. A B
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade Federal de Lavras (UFLA)
dc.contributor.institutionEmpresa Brasileira de Pesquisa Agropecuária (EMBRAPA)
dc.date.accessioned2014-05-27T11:21:01Z
dc.date.available2014-05-27T11:21:01Z
dc.date.issued2004-01-01
dc.description.abstractShear soil strength is an important dynamic property of the soil, as well as the state of soil consistence concerning the structure behavior of agricultural soils, which are mostly being ignored in research into the influence of use and management. This fact has been contributing to the perennial problem of fallacious strategies, causing degradation of the physical and mechanical soil properties. This study aimed at an evaluation of the shear soil strength of a dystrophic Red Latosol submitted to conventional tillage, direct seeding, and Cerrado as control treatment, with different water contents: 0.05; 0.16; 0.18, and 0.38 kg kg -1. Results allowed the conclusion that the shear strength of the soil, appraised at a depth of 0-0.05 m of a dystrophic Red Latosol, was affected by water content increases, use and management type. In general, the adjusted equations according to the Coulomb model evidenced greater shear strength in the Cerrado, followed by conventional tillage, and direct seeding. The lowest shear strength of the studied soil, corroborated by the smallest internal friction angle (tg φ) and larger apparent cohesion (c), specifically for the water content 0.16 and 0.27 kg kg -1 (contemplating, therefore, the friable range of the soil), pointed to direct seeding as the management with the greatest possibilities of preserving the structural sustainability of the soil studied. The prediction of shear tension proved to be sensitive to the effects of soil water variations and the use type. This enables significant contributions, particularly to studies on the structural sustainability of agricultural soils, which are usually impaired by inadequate traffic and tillage operations.en
dc.description.affiliationPrograms Energia na Agricultura - FCA/UNESP Fazenda Experimental Lageado Bolsista da FAPESP, Caixa Postal 237
dc.description.affiliationDepartamento de Ciência do Solo Universidade Federal de Lavras - UFLA Bolsista do CNPq, CEP 37200-000 Lavras (MG)
dc.description.affiliationIniciação Científica Departamento de Engenharia Agrícola UFLA
dc.description.affiliationEmbrapa Cerrados CPAC, Planaltina (DF)
dc.description.affiliationUnespPrograms Energia na Agricultura - FCA/UNESP Fazenda Experimental Lageado Bolsista da FAPESP, Caixa Postal 237
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.format.extent165-173
dc.identifierhttp://dx.doi.org/10.1590/S0100-06832004000100016
dc.identifier.citationRevista Brasileira de Ciencia do Solo, v. 28, n. 1, p. 165-173, 2004.
dc.identifier.doi10.1590/S0100-06832004000100016
dc.identifier.file2-s2.0-18644373674.pdf
dc.identifier.issn0100-0683
dc.identifier.lattes1040231842718937
dc.identifier.orcid0000-0002-2171-7073
dc.identifier.scieloS0100-06832004000100016
dc.identifier.scopus2-s2.0-18644373674
dc.identifier.urihttp://hdl.handle.net/11449/67602
dc.language.isopor
dc.relation.ispartofRevista Brasileira de Ciência do Solo
dc.relation.ispartofjcr0.799
dc.relation.ispartofsjr0,679
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectLatossolen
dc.subjectSoil managementen
dc.subjectStructural sustainabilityen
dc.titleResistência ao Cisalhamento de um Latossolo sob Diferentes uso e Manejopt
dc.title.alternativeShear strength of a latosol under different use and managementen
dc.typeArtigo
dcterms.licensehttp://www.scielo.br/revistas/rbcs/paboutj.htm#copyright
unesp.author.lattes1040231842718937[1]
unesp.author.orcid0000-0002-2171-7073[1]

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