Registro Completo
Biblioteca(s): |
Embrapa Arroz e Feijão. |
Data corrente: |
09/05/2011 |
Data da última atualização: |
30/07/2012 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
B - 1 |
Autoria: |
SANTOS, G. G.; SILVA, E. M. da; MARCHÃO, R. L.; SILVEIRA, P. M. da; BRUAND, A.; JAMES, F.; BECQUER, T. |
Afiliação: |
GLENIO GUIMARÃES SANTOS, UNIVERSIDADE FEDERAL DO PIAUÍ; EUZÉBIO MEDRADO DA SILVA, CPAC; ROBELIO LEANDRO MARCHAO, CPAC; PEDRO MARQUES DA SILVEIRA, CNPAF; ARY BRUAND, CNRS/INSU; FRANCOIS JAMES, CNRS/UMR; THIERRY BECQUER, IRD/UMR. |
Título: |
Analysis of physical quality of soil using the water retention curve: validity of the S-index. |
Ano de publicação: |
2011 |
Fonte/Imprenta: |
Comptes Rendus Géoscience, Paris, v. 343, n. 4, p. 295-301, April 2011. |
Idioma: |
Inglês |
Conteúdo: |
Among the various soil indicators established in order to discuss physical properties of soils is the S-index, derived from the slope of the soil water retention curve at its inflection point, used by a number of authors. In this publication we discuss the value of the slope at the inflection point of the soil water retention curve according to the independent variable used to plot it. We show that a representation of the water content according to the arithmetic rather than logarithmic expression of the suction for the S-index yields a different result for the soil selected. More generally, our results show that examining the physical properties of soil using a water retention curve plotted with an arithmetic expression of suction offers greater potential than when plotted with its natural or decimal logarithm as is often found in the literature. |
Palavras-Chave: |
Características hídricas do solo; Densidade aparente; Índice S. |
Thesagro: |
Compactação do solo. |
Thesaurus NAL: |
Bulk density; Soil compaction; Soil water characteristic. |
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
Marc: |
LEADER 01682naa a2200277 a 4500 001 1888003 005 2012-07-30 008 2011 bl uuuu u00u1 u #d 100 1 $aSANTOS, G. G. 245 $aAnalysis of physical quality of soil using the water retention curve$bvalidity of the S-index. 260 $c2011 520 $aAmong the various soil indicators established in order to discuss physical properties of soils is the S-index, derived from the slope of the soil water retention curve at its inflection point, used by a number of authors. In this publication we discuss the value of the slope at the inflection point of the soil water retention curve according to the independent variable used to plot it. We show that a representation of the water content according to the arithmetic rather than logarithmic expression of the suction for the S-index yields a different result for the soil selected. More generally, our results show that examining the physical properties of soil using a water retention curve plotted with an arithmetic expression of suction offers greater potential than when plotted with its natural or decimal logarithm as is often found in the literature. 650 $aBulk density 650 $aSoil compaction 650 $aSoil water characteristic 650 $aCompactação do solo 653 $aCaracterísticas hídricas do solo 653 $aDensidade aparente 653 $aÍndice S 700 1 $aSILVA, E. M. da 700 1 $aMARCHÃO, R. L. 700 1 $aSILVEIRA, P. M. da 700 1 $aBRUAND, A. 700 1 $aJAMES, F. 700 1 $aBECQUER, T. 773 $tComptes Rendus Géoscience, Paris$gv. 343, n. 4, p. 295-301, April 2011.
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Registro original: |
Embrapa Arroz e Feijão (CNPAF) |
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