Data/hora: 22/09/2024 23:05:07

Biblioteca(s): 	Embrapa Cerrados.	
Data corrente: 	23/05/2011	
Data da última atualização: 	26/08/2011	
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 Geoscience, 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: 	Caracterísitcas hídricas do solo; Densidade aparente; Índice S.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Cerrados (CPAC)	
Exemplares: 	CPAC - (32611-1) - UPC - SP - PP - S1442 -  - S1442 - DIS