<?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>0012-7353</journal-id>
<journal-title><![CDATA[DYNA]]></journal-title>
<abbrev-journal-title><![CDATA[Dyna rev.fac.nac.minas]]></abbrev-journal-title>
<issn>0012-7353</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional de Colombia]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0012-73532021000300136</article-id>
<article-id pub-id-type="doi">10.15446/dyna.v88n218.89499</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Adjusting the water retention curve for retractable soils]]></article-title>
<article-title xml:lang="es"><![CDATA[Ajuste de las curvas de retención de agua para suelos retráctiles]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Silva]]></surname>
<given-names><![CDATA[Luana da]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Albuquerque]]></surname>
<given-names><![CDATA[ackson Adriano]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sequinatto]]></surname>
<given-names><![CDATA[Letícia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bortolini]]></surname>
<given-names><![CDATA[Diego]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidade do Estado de Santa Catarina  ]]></institution>
<addr-line><![CDATA[Lages ]]></addr-line>
<country>Brazil</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2021</year>
</pub-date>
<volume>88</volume>
<numero>218</numero>
<fpage>136</fpage>
<lpage>142</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0012-73532021000300136&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0012-73532021000300136&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0012-73532021000300136&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The soil water retention curve (SWRC) relates moisture to soil water retention energy (matrix potential). The calculation of the volumetric humidity considers the sample volume. In retractable soils, this volume varies according to the drying or wetting of the soil, which can result in errors in the calculated moisture. The objective of this study is to quantify the volume variation in retractable soils and to elaborate the SWRC via the traditional method, which does not consider soil retraction, and a second method, called adjusted, that considers the phenomenon of soil retraction. Soil samples have been collected in horizons A and B from six soil profiles Thus, for retractable soils, it is recommended that the adjustment of the SWRC be carried out considering the actual volume of the soil (retracted), which varies for each matrix potential applied. This adjustment reduces errors, mainly in determining the permanent wilt point and available water.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen La curva de retención de agua del suelo (SWRC) relaciona la humedad con la energía de retención de agua (potencial de matriz). En suelos retráctiles, este volumen varía de acuerdo con el secado o la humectación del suelo, lo que puede provocar errores en la humedad calculada. El objetivo de este estudio es cuantificar la variación de volumen en los suelos retráctiles y elaborar el SWRC a través del método tradicional, que no considera la retracción del suelo, y un segundo método, que considera la retracción. Se han recolectado muestras de suelo en los horizontes A y B de seis perfiles de suelo. Por lo tanto, para suelos retráctiles, se recomienda que el ajuste del SWRC se lleve a cabo considerando el volumen real del suelo (retraído), que varía para cada potencial de matriz aplicado. Este ajuste reduce los errores, principalmente al determinar el punto de marchitez permanente y el agua disponible.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[retraction]]></kwd>
<kwd lng="en"><![CDATA[available water]]></kwd>
<kwd lng="en"><![CDATA[estimation]]></kwd>
<kwd lng="es"><![CDATA[retraccíon]]></kwd>
<kwd lng="es"><![CDATA[agua disponible]]></kwd>
<kwd lng="es"><![CDATA[estimar]]></kwd>
</kwd-group>
</article-meta>
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<source><![CDATA[Soil Science Society American Journal]]></source>
<year>1980</year>
<numero>44</numero>
<issue>44</issue>
<page-range>892-7</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
