Gamma-ray beam attenuation as an auxiliary technique for the evaluation of the soil water retention curve

Detalhes bibliográficos
Autor(a) principal: BACCHI,O.O.S.
Data de Publicação: 1998
Outros Autores: REICHARDT,K., OLIVEIRA,J.C.M., NIELSEN,D.R.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Scientia Agrícola (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161998000300019
Resumo: The soil water retention curve is fundamental for the hydraulic characterization of a soil and has many applications in agricultural research as well as in practical agriculture. A new procedure for soil moisture and soil bulk density evaluation inside closed pressure chambers through gamma-ray beam attenuation is presented. The proposed procedure presents several advantages in relation to the traditional process: avoids the need of continuous sample manipulation; minimizes the problem of hysteresis; allows a more precise evaluation of soil moisture by taking into account changes of soil bulk density due to swelling or shrinking on addition or removal of water; allows frequent evaluation of soil moisture without the need of opening the pressure chamber; allows a more precise judgement of equilibrium; reduces drastically the time of the determination of the retention curve and allows easy automation of data acquisition by a computer.
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spelling Gamma-ray beam attenuation as an auxiliary technique for the evaluation of the soil water retention curvegamma attenuationgamma radiationsoil water retentionThe soil water retention curve is fundamental for the hydraulic characterization of a soil and has many applications in agricultural research as well as in practical agriculture. A new procedure for soil moisture and soil bulk density evaluation inside closed pressure chambers through gamma-ray beam attenuation is presented. The proposed procedure presents several advantages in relation to the traditional process: avoids the need of continuous sample manipulation; minimizes the problem of hysteresis; allows a more precise evaluation of soil moisture by taking into account changes of soil bulk density due to swelling or shrinking on addition or removal of water; allows frequent evaluation of soil moisture without the need of opening the pressure chamber; allows a more precise judgement of equilibrium; reduces drastically the time of the determination of the retention curve and allows easy automation of data acquisition by a computer.Escola Superior de Agricultura "Luiz de Queiroz"1998-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161998000300019Scientia Agricola v.55 n.3 1998reponame:Scientia Agrícola (Online)instname:Universidade de São Paulo (USP)instacron:USP10.1590/S0103-90161998000300019info:eu-repo/semantics/openAccessBACCHI,O.O.S.REICHARDT,K.OLIVEIRA,J.C.M.NIELSEN,D.R.eng1999-05-14T00:00:00Zoai:scielo:S0103-90161998000300019Revistahttp://revistas.usp.br/sa/indexPUBhttps://old.scielo.br/oai/scielo-oai.phpscientia@usp.br||alleoni@usp.br1678-992X0103-9016opendoar:1999-05-14T00:00Scientia Agrícola (Online) - Universidade de São Paulo (USP)false
dc.title.none.fl_str_mv Gamma-ray beam attenuation as an auxiliary technique for the evaluation of the soil water retention curve
title Gamma-ray beam attenuation as an auxiliary technique for the evaluation of the soil water retention curve
spellingShingle Gamma-ray beam attenuation as an auxiliary technique for the evaluation of the soil water retention curve
BACCHI,O.O.S.
gamma attenuation
gamma radiation
soil water retention
title_short Gamma-ray beam attenuation as an auxiliary technique for the evaluation of the soil water retention curve
title_full Gamma-ray beam attenuation as an auxiliary technique for the evaluation of the soil water retention curve
title_fullStr Gamma-ray beam attenuation as an auxiliary technique for the evaluation of the soil water retention curve
title_full_unstemmed Gamma-ray beam attenuation as an auxiliary technique for the evaluation of the soil water retention curve
title_sort Gamma-ray beam attenuation as an auxiliary technique for the evaluation of the soil water retention curve
author BACCHI,O.O.S.
author_facet BACCHI,O.O.S.
REICHARDT,K.
OLIVEIRA,J.C.M.
NIELSEN,D.R.
author_role author
author2 REICHARDT,K.
OLIVEIRA,J.C.M.
NIELSEN,D.R.
author2_role author
author
author
dc.contributor.author.fl_str_mv BACCHI,O.O.S.
REICHARDT,K.
OLIVEIRA,J.C.M.
NIELSEN,D.R.
dc.subject.por.fl_str_mv gamma attenuation
gamma radiation
soil water retention
topic gamma attenuation
gamma radiation
soil water retention
description The soil water retention curve is fundamental for the hydraulic characterization of a soil and has many applications in agricultural research as well as in practical agriculture. A new procedure for soil moisture and soil bulk density evaluation inside closed pressure chambers through gamma-ray beam attenuation is presented. The proposed procedure presents several advantages in relation to the traditional process: avoids the need of continuous sample manipulation; minimizes the problem of hysteresis; allows a more precise evaluation of soil moisture by taking into account changes of soil bulk density due to swelling or shrinking on addition or removal of water; allows frequent evaluation of soil moisture without the need of opening the pressure chamber; allows a more precise judgement of equilibrium; reduces drastically the time of the determination of the retention curve and allows easy automation of data acquisition by a computer.
publishDate 1998
dc.date.none.fl_str_mv 1998-01-01
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=S0103-90161998000300019
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161998000300019
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0103-90161998000300019
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 Escola Superior de Agricultura "Luiz de Queiroz"
publisher.none.fl_str_mv Escola Superior de Agricultura "Luiz de Queiroz"
dc.source.none.fl_str_mv Scientia Agricola v.55 n.3 1998
reponame:Scientia Agrícola (Online)
instname:Universidade de São Paulo (USP)
instacron:USP
instname_str Universidade de São Paulo (USP)
instacron_str USP
institution USP
reponame_str Scientia Agrícola (Online)
collection Scientia Agrícola (Online)
repository.name.fl_str_mv Scientia Agrícola (Online) - Universidade de São Paulo (USP)
repository.mail.fl_str_mv scientia@usp.br||alleoni@usp.br
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