Resistência ao Cisalhamento de um Latossolo sob Diferentes uso e Manejo
Autor(a) principal: | |
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Data de Publicação: | 2004 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1590/S0100-06832004000100016 http://hdl.handle.net/11449/67602 |
Resumo: | Shear 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. |
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Resistência ao Cisalhamento de um Latossolo sob Diferentes uso e ManejoShear strength of a latosol under different use and managementLatossolSoil managementStructural sustainabilityShear 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.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Programs Energia na Agricultura - FCA/UNESP Fazenda Experimental Lageado Bolsista da FAPESP, Caixa Postal 237Departamento de Ciência do Solo Universidade Federal de Lavras - UFLA Bolsista do CNPq, CEP 37200-000 Lavras (MG)Iniciação Científica Departamento de Engenharia Agrícola UFLAEmbrapa Cerrados CPAC, Planaltina (DF)Programs Energia na Agricultura - FCA/UNESP Fazenda Experimental Lageado Bolsista da FAPESP, Caixa Postal 237Universidade Estadual Paulista (Unesp)Universidade Federal de Lavras (UFLA)Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA)Silva, Reginaldo Barboza da [UNESP]Dias Junior, M. S.Santos, F. L.Franz, C. A B2014-05-27T11:21:01Z2014-05-27T11:21:01Z2004-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article165-173application/pdfhttp://dx.doi.org/10.1590/S0100-06832004000100016Revista Brasileira de Ciencia do Solo, v. 28, n. 1, p. 165-173, 2004.0100-0683http://hdl.handle.net/11449/6760210.1590/S0100-06832004000100016S0100-068320040001000162-s2.0-186443736742-s2.0-18644373674.pdf10402318427189370000-0002-2171-7073Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPporRevista Brasileira de Ciência do Solo0.7990,679info:eu-repo/semantics/openAccess2024-04-09T15:43:35Zoai:repositorio.unesp.br:11449/67602Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-04-09T15:43:35Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Resistência ao Cisalhamento de um Latossolo sob Diferentes uso e Manejo Shear strength of a latosol under different use and management |
title |
Resistência ao Cisalhamento de um Latossolo sob Diferentes uso e Manejo |
spellingShingle |
Resistência ao Cisalhamento de um Latossolo sob Diferentes uso e Manejo Silva, Reginaldo Barboza da [UNESP] Latossol Soil management Structural sustainability |
title_short |
Resistência ao Cisalhamento de um Latossolo sob Diferentes uso e Manejo |
title_full |
Resistência ao Cisalhamento de um Latossolo sob Diferentes uso e Manejo |
title_fullStr |
Resistência ao Cisalhamento de um Latossolo sob Diferentes uso e Manejo |
title_full_unstemmed |
Resistência ao Cisalhamento de um Latossolo sob Diferentes uso e Manejo |
title_sort |
Resistência ao Cisalhamento de um Latossolo sob Diferentes uso e Manejo |
author |
Silva, Reginaldo Barboza da [UNESP] |
author_facet |
Silva, Reginaldo Barboza da [UNESP] Dias Junior, M. S. Santos, F. L. Franz, C. A B |
author_role |
author |
author2 |
Dias Junior, M. S. Santos, F. L. Franz, C. A B |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Universidade Federal de Lavras (UFLA) Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA) |
dc.contributor.author.fl_str_mv |
Silva, Reginaldo Barboza da [UNESP] Dias Junior, M. S. Santos, F. L. Franz, C. A B |
dc.subject.por.fl_str_mv |
Latossol Soil management Structural sustainability |
topic |
Latossol Soil management Structural sustainability |
description |
Shear 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. |
publishDate |
2004 |
dc.date.none.fl_str_mv |
2004-01-01 2014-05-27T11:21:01Z 2014-05-27T11:21:01Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1590/S0100-06832004000100016 Revista Brasileira de Ciencia do Solo, v. 28, n. 1, p. 165-173, 2004. 0100-0683 http://hdl.handle.net/11449/67602 10.1590/S0100-06832004000100016 S0100-06832004000100016 2-s2.0-18644373674 2-s2.0-18644373674.pdf 1040231842718937 0000-0002-2171-7073 |
url |
http://dx.doi.org/10.1590/S0100-06832004000100016 http://hdl.handle.net/11449/67602 |
identifier_str_mv |
Revista Brasileira de Ciencia do Solo, v. 28, n. 1, p. 165-173, 2004. 0100-0683 10.1590/S0100-06832004000100016 S0100-06832004000100016 2-s2.0-18644373674 2-s2.0-18644373674.pdf 1040231842718937 0000-0002-2171-7073 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
Revista Brasileira de Ciência do Solo 0.799 0,679 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
165-173 application/pdf |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
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1799965621017903104 |