<?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>0187-5779</journal-id>
<journal-title><![CDATA[Terra Latinoamericana]]></journal-title>
<abbrev-journal-title><![CDATA[Terra Latinoam]]></abbrev-journal-title>
<issn>0187-5779</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Mexicana de la Ciencia del Suelo A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0187-57792025000100501</article-id>
<article-id pub-id-type="doi">10.28940/terra.v43i.2047</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Does Soil Structure Influence Phosphorus Availability in Andosols?]]></article-title>
<article-title xml:lang="es"><![CDATA[¿La Estructura del Suelo Influye en la Disponibilidad de Fósforo en Andosoles?]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Clunes]]></surname>
<given-names><![CDATA[John]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Werner-Auad]]></surname>
<given-names><![CDATA[Sadi]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bustos-Korts]]></surname>
<given-names><![CDATA[Daniela]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Zúñiga-Ugalde]]></surname>
<given-names><![CDATA[Felipe]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Austral de Chile Facultad de Ciencias Agrarias y Alimentarias Instituto de Ingeniería Agraria y Suelos]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Chile</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Austral de Chile Instituto de Producción y Sanidad Vegetal ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Chile</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Austral de Chile Facultad de Ciencias Forestales y Recursos Naturales ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Chile</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Austral de Chile Centro de Investigación en Suelos Volcánicos ]]></institution>
<addr-line><![CDATA[ Valdivia]]></addr-line>
<country>Chile</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2025</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2025</year>
</pub-date>
<volume>43</volume>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0187-57792025000100501&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0187-57792025000100501&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0187-57792025000100501&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Summary: Phosphorus (P) availability in the soil is a limiting nutrient for biomass production in agroecosystems developed in Andosols. Nonetheless, it remains unknown how soil structure affects the storage and availability of this nutrient. Thus, this research aimed to evaluate the role of soil structure in phosphorus availability using Olsen P as a chemical indicator of availability. Undisturbed and disturbed soil samples were collected following a grid pattern under naturalized and sowed pastures that reflected two different soil structures (untilled and tilled, respectively). The untilled soil showed higher variability and a higher concentration of Olsen P (5-27 mg kg-1) than the tilled soil (14 mg kg-1). Undisturbed samples collected in cylinders showed that Olsen P continues to increase after removing the soil from the cylinder, sieving the sample, and re-extracting Olsen P, resulting in three times the amount of Olsen P found in disturbed samples collected before the experiment. The methodological approach used in this research allowed to highlight the role that soil structure plays in the availability of P over time to improve the efficiency of nutrient utilization.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: La disponibilidad de fósforo (P) en el suelo es un nutriente limitante para la producción de biomasa en agroecosistemas desarrollados en Andosoles. Sin embargo, aún se desconoce si la estructura del suelo afecta el almacenamiento y la disponibilidad de este nutriente. Por lo tanto, esta investigación tuvo como objetivo evaluar el rol de la estructura del suelo en la disponibilidad de fósforo utilizando el P Olsen como indicador. Se tomaron muestras de suelo no disturbadas y disturbadas siguiendo un patrón de cuadrícula bajo praderas naturalizadas y sembradas que reflejaban dos estructuras de suelo diferentes (sin labrar y labrado, respectivamente). El suelo no labrado mostró una mayor variabilidad y concentración de P Olsen (5-27 mg kg-1) que el suelo labrado (14 mg kg-1). Las muestras no disturbadas recolectadas en cilindros mostraron que el P Olsen continúa aumentando después de retirar el suelo del cilindro, tamizar la muestra y volver a extraer el P Olsen, lo que da como resultado una cantidad de P Olsen tres veces mayor que la encontrada en las muestras disturbadas recolectadas antes del experimento. El enfoque metodológico utilizado en esta investigación permitió resaltar el papel que juega la estructura del suelo en la disponibilidad de P a lo largo del tiempo para mejorar la eficiencia de la utilización de nutrientes.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[allophane]]></kwd>
<kwd lng="en"><![CDATA[Olsen P]]></kwd>
<kwd lng="en"><![CDATA[spatial heterogeneity]]></kwd>
<kwd lng="es"><![CDATA[alofán]]></kwd>
<kwd lng="es"><![CDATA[P Olsen]]></kwd>
<kwd lng="es"><![CDATA[heterogeneidad espacial]]></kwd>
</kwd-group>
</article-meta>
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