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	Provedor de dados Rev. Bras. Ciênc. Solo (2) Autor Macedo,José Ronaldo de (2) Oliveira,Muriel Batista de (2) Ottoni Filho,Theophilo Benedicto (2) Ottoni,Marta Vasconcelos (2) Reichardt,Klaus (1) Palavra-chave Aeration capacity (2) Internal drainage (2) Infiltration test (1) Soil water retention (1) Tipo do documento Info:eu-repo/semantics/other (2) Ano 2014 (2) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Estimation of field capacity from ring infiltrometer-drainage data Rev. Bras. Ciênc. Solo Ottoni Filho,Theophilo Benedicto; Ottoni,Marta Vasconcelos; Oliveira,Muriel Batista de; Macedo,José Ronaldo de. Field capacity (FC) is a parameter widely used in applied soil science. However, its in situ method of determination may be difficult to apply, generally because of the need of large supplies of water at the test sites. Ottoni Filho et al. (2014) proposed a standardized procedure for field determination of FC and showed that such in situ FC can be estimated by a linear pedotransfer function (PTF) based on volumetric soil water content at the matric potential of -6 kPa [θ(6)] for the same soils used in the present study. The objective of this study was to use soil moisture data below a double ring infiltrometer measured 48 h after the end of the infiltration test in order to develop PTFs for standard in situ FC. We found that such ring FC data were an... Tipo: Info:eu-repo/semantics/other Palavras-chave: Infiltration test; Internal drainage; Aeration capacity. Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000600011 Revisiting Field Capacity (FC): variation of definition of FC and its estimation from pedotransfer functions Rev. Bras. Ciênc. Solo Ottoni Filho,Theophilo Benedicto; Ottoni,Marta Vasconcelos; Oliveira,Muriel Batista de; Macedo,José Ronaldo de; Reichardt,Klaus. Taking into account the nature of the hydrological processes involved in in situ measurement of Field Capacity (FC), this study proposes a variation of the definition of FC aiming not only at minimizing the inadequacies of its determination, but also at maintaining its original, practical meaning. Analysis of FC data for 22 Brazilian soils and additional FC data from the literature, all measured according to the proposed definition, which is based on a 48-h drainage time after infiltration by shallow ponding, indicates a weak dependency on the amount of infiltrated water, antecedent moisture level, soil morphology, and the level of the groundwater table, but a strong dependency on basic soil properties. The dependence on basic soil properties allowed... Tipo: Info:eu-repo/semantics/other Palavras-chave: Internal drainage; Aeration capacity; Soil water retention. Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832014000600010 Registros recuperados: 2 Primeira ... 1 ... Última

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