<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0871-018X</journal-id>
<journal-title><![CDATA[Revista de Ciências Agrárias]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. de Ciências Agrárias]]></abbrev-journal-title>
<issn>0871-018X</issn>
<publisher>
<publisher-name><![CDATA[Sociedade de Ciências Agrárias de Portugal]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0871-018X2023000500131</article-id>
<article-id pub-id-type="doi">10.19084/rca.33905</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Study of the influence of the standing time in the electrical conductivity of the saturated soil paste in three soils]]></article-title>
<article-title xml:lang="pt"><![CDATA[Análise da influência do tempo de repouso na condutividade elétrica da pasta saturada de três solos]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Antunes]]></surname>
<given-names><![CDATA[João]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Paz]]></surname>
<given-names><![CDATA[Ana Marta]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Castanheira]]></surname>
<given-names><![CDATA[Nádia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gonçalves]]></surname>
<given-names><![CDATA[Maria Conceição]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cortez]]></surname>
<given-names><![CDATA[Nuno]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,National Institute for Agricultural and Veterinary Research  ]]></institution>
<addr-line><![CDATA[Oeiras ]]></addr-line>
<country>Portugal</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,University of Lisbon School of Agriculture ]]></institution>
<addr-line><![CDATA[Lisboa ]]></addr-line>
<country>Portugal</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2023</year>
</pub-date>
<volume>46</volume>
<numero>sp</numero>
<fpage>131</fpage>
<lpage>140</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_arttext&amp;pid=S0871-018X2023000500131&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_abstract&amp;pid=S0871-018X2023000500131&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_pdf&amp;pid=S0871-018X2023000500131&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The electrical conductivity of the saturated soil paste extract (EC e ) is a reference measurement for soil salinity because it allows comparison among soils regardless of the water content under field conditions. The saturated soil paste is obtained by saturating a soil sample with deionized water, according to a method published about seven decades ago that has been recently updated with the inclusion of an extra standing time of 24 hours. This study analyses the influence of three standing times in the determination of EC e , the saturation percentage (SP), and the electrical conductivity of the soil solution (EC  sw ), in three soils with different textures (sand, loam, and silty clay). The results show highly significant differences in EC  e and significant differences in EC  sw in the sandy soil, when including a standing time of 2 hours compared to no standing time. No significant differences were found when including an additional standing time of 24 hours.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Resumo A condutividade elétrica do extrato pasta saturada do solo (EC  e ) é amplamente usada como medida de referência para a salinidade do solo, pois permite a comparação da salinidade entre solos independentemente de seu teor de água em condições de campo. Ao mesmo tempo, a EC  e é mais comparável com condutividade da solução do solo (EC  sw ) do que a dos extratos de outras razões solo-água (1:1, 1:2 ou 1:5). A pasta saturada do solo é obtida através da saturação de uma amostra de solo com água desionizada, segundo um método publicado há cerca de sete décadas, e que foi recentemente atualizado com a inclusão um tempo de repouso de 24 horas. O presente estudo analisa a influência de três diferentes tempos de repouso na obtenção da pasta saturada de solo e sua influência na EC  e , percentagem de saturação (SP) e EC  sw em três solos com diferentes texturas (arenoso, franco e argilo-limoso) Os resultados mostram diferenças altamente significativas na EC  e e diferenças significativas na EC  sw , apenas no caso do solo arenoso, quando se inclui um tempo de repouso de 2 horas face à ausência de tempo de repouso.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[saturated soil paste]]></kwd>
<kwd lng="en"><![CDATA[soil salinity]]></kwd>
<kwd lng="en"><![CDATA[electrical conductivity]]></kwd>
<kwd lng="en"><![CDATA[saturation percentage]]></kwd>
<kwd lng="pt"><![CDATA[pasta saturada do solo]]></kwd>
<kwd lng="pt"><![CDATA[salinidade do solo]]></kwd>
<kwd lng="pt"><![CDATA[condutividade elétrica]]></kwd>
<kwd lng="pt"><![CDATA[percentagem de saturação]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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