| Registro completo |
| Provedor de dados: |
PAB
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| País: |
Brazil
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| Título: |
Prediction of soil shear strength in agricultural and natural environments of the Brazilian Cerrado
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| Autores: |
Silva,Reginaldo Barboza da
Dias Junior,Moacir de Souza
Iori,Piero
Silva,Francisca Alcivânia de Melo
Folle,Sergio Mauro
Franz,Claudio Alberto Bento
Souza,Zigomar Menezes de
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| Data: |
2015-01-01
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| Ano: |
2015
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| Palavras-chave: |
Cohesion limits
Machine-ground interaction
Mechanical resistance
Precompression stress
Soil compaction
Soil physical quality.
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| Resumo: |
The objective of this work was to develop uni- and multivariate models to predict maximum soil shear strength (τmax) under different normal stresses (σn), water contents (U), and soil managements. The study was carried out in a Rhodic Haplustox under Cerrado (control area) and under no-tillage and conventional tillage systems. Undisturbed soil samples were taken in the 0.00-0.05 m layer and subjected to increasing U and σn, in shear strength tests. The uni- and multivariate models - respectively τmax=10(a+bU) and τmax=10(a+bU+cσn) - were significant in all three soil management systems evaluated and they satisfactorily explain the relationship between U, σn, and τmax. The soil under Cerrado has the highest shear strength (τ) estimated with the univariate model, regardless of the soil water content, whereas the soil under conventional tillage shows the highest values with the multivariate model, which were associated to the lowest water contents at the soil consistency limits in this management system.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2015000100082
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| Editor: |
Embrapa Secretaria de Pesquisa e Desenvolvimento
Pesquisa Agropecuária Brasileira
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| Relação: |
10.1590/S0100-204X2015000100009
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| Formato: |
text/html
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| Fonte: |
Pesquisa Agropecuária Brasileira v.50 n.1 2015
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| Direitos: |
info:eu-repo/semantics/openAccess
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