Soil hydrophobicity: comparative study of usual determination methods
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Ciência Rural |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015000200260 |
Resumo: | 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 soil samples were subjected to minor changes due to the use of macroaggregates to preserve the distribution of solid constituents in the soil. Due to the homogeneity of the soil samples the WDPT method gave smaller coefficients of variation unlike the TMI method where the soil structure is preserved. However, both methods had low coefficients of variation, and are thus effective for determining the soil hydrophobicity, especially when the log hydrophobicity index or log WDPT is >1. |
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Ciência rural (Online) |
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Soil hydrophobicity: comparative study of usual determination methodswater repellencywater drop penetration timewater infiltration.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 soil samples were subjected to minor changes due to the use of macroaggregates to preserve the distribution of solid constituents in the soil. Due to the homogeneity of the soil samples the WDPT method gave smaller coefficients of variation unlike the TMI method where the soil structure is preserved. However, both methods had low coefficients of variation, and are thus effective for determining the soil hydrophobicity, especially when the log hydrophobicity index or log WDPT is >1.Universidade Federal de Santa Maria2015-02-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015000200260Ciência Rural v.45 n.2 2015reponame:Ciência Ruralinstname:Universidade Federal de Santa Maria (UFSM)instacron:UFSM10.1590/0103-8478cr20140042info:eu-repo/semantics/openAccessVogelmann,Eduardo SaldanhaReichert,José MiguelPrevedello,JulianaAwe,Gabriel OladeleReinert,Dalvan Joséeng2015-03-03T00:00:00ZRevista |
dc.title.none.fl_str_mv |
Soil hydrophobicity: comparative study of usual determination methods |
title |
Soil hydrophobicity: comparative study of usual determination methods |
spellingShingle |
Soil hydrophobicity: comparative study of usual determination methods Vogelmann,Eduardo Saldanha water repellency water drop penetration time water infiltration. |
title_short |
Soil hydrophobicity: comparative study of usual determination methods |
title_full |
Soil hydrophobicity: comparative study of usual determination methods |
title_fullStr |
Soil hydrophobicity: comparative study of usual determination methods |
title_full_unstemmed |
Soil hydrophobicity: comparative study of usual determination methods |
title_sort |
Soil hydrophobicity: comparative study of usual determination methods |
author |
Vogelmann,Eduardo Saldanha |
author_facet |
Vogelmann,Eduardo Saldanha Reichert,José Miguel Prevedello,Juliana Awe,Gabriel Oladele Reinert,Dalvan José |
author_role |
author |
author2 |
Reichert,José Miguel Prevedello,Juliana Awe,Gabriel Oladele Reinert,Dalvan José |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Vogelmann,Eduardo Saldanha Reichert,José Miguel Prevedello,Juliana Awe,Gabriel Oladele Reinert,Dalvan José |
dc.subject.por.fl_str_mv |
water repellency water drop penetration time water infiltration. |
topic |
water repellency water drop penetration time water infiltration. |
description |
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 soil samples were subjected to minor changes due to the use of macroaggregates to preserve the distribution of solid constituents in the soil. Due to the homogeneity of the soil samples the WDPT method gave smaller coefficients of variation unlike the TMI method where the soil structure is preserved. However, both methods had low coefficients of variation, and are thus effective for determining the soil hydrophobicity, especially when the log hydrophobicity index or log WDPT is >1. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-02-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015000200260 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015000200260 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/0103-8478cr20140042 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Universidade Federal de Santa Maria |
publisher.none.fl_str_mv |
Universidade Federal de Santa Maria |
dc.source.none.fl_str_mv |
Ciência Rural v.45 n.2 2015 reponame:Ciência Rural instname:Universidade Federal de Santa Maria (UFSM) instacron:UFSM |
instname_str |
Universidade Federal de Santa Maria (UFSM) |
instacron_str |
UFSM |
institution |
UFSM |
reponame_str |
Ciência Rural |
collection |
Ciência Rural |
repository.name.fl_str_mv |
|
repository.mail.fl_str_mv |
|
_version_ |
1749140546735046656 |