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Hydro-physical processes and soil properties correlated with origin of soil hydrophobicity Ciência Rural
Vogelmann,Eduardo Saldanha; Reichert,José Miguel; Prevedello,Juliana; Awe,Gabriel Oladele.
Hydrophobicity is the phenomenon where the soil has reduced wettability, usually associated with coating of soil particles by hydrophobic organic substances. This study aimed to provide a description of the hydrophobicity occurrence, highlight recent discoveries about the origin of phenomenon and discuss the main hydro-physical properties and chemical processes linked to the development of hydrophobic behavior in soils. Hydrophobicity is associated with other factors such as soil moisture, presence of some fungi species, particle size, soil pH and occurrence of burnings. The causative substances may be provided by local vegetation, through deposition or decomposition. The dependence and combination of different factors that influence hydrophobicity in...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Hydrophobic; Hydrophilic; Organic matter; Water repellency; Soil moisture.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782013000900008
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Soil hydrophobicity: comparative study of usual determination methods Ciência Rural
Vogelmann,Eduardo Saldanha; Reichert,José Miguel; Prevedello,Juliana; Awe,Gabriel Oladele; Reinert,Dalvan José.
Hydrophobic or water repellent soils slowly absorb water because of the low wett ability of the soil particles which are coated with hydrophobic organic substances. These pose significant effects on plant growth, water infiltration and retention, surface runoff and erosion. The objective of this study was to compare the performance of tension micro-infiltrometer(TMI) and the water drop penetration time (WDPT) methods in the determination of the hydrophobicity index of eighteen soils from southern Brazil. Soil samples were collected from the 0-5cm soil layer to determine particle size distribution, organic matter content, hydrophobicity index of soil aggregates and droplet penetration time of disaggregated and sieved soil samples. For the TMI method the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Water repellency; Water drop penetration time; Water infiltration..
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015000200260
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