<?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>S0187-57792022000100121</article-id>
<article-id pub-id-type="doi">10.28940/terra.v40i0.1447</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Formación de suelos a partir de tepetates: unidades estructurales, carbono orgánico y estabilidad estructural]]></article-title>
<article-title xml:lang="en"><![CDATA[Soil formation from tepetates: structural unities, organic carbon, and structural stability]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Velázquez-Rodríguez]]></surname>
<given-names><![CDATA[Alma S.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Báez-Pérez]]></surname>
<given-names><![CDATA[Aurelio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hidalgo-Moreno]]></surname>
<given-names><![CDATA[Claudia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Parsa-Retana]]></surname>
<given-names><![CDATA[Mayra]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Etchevers-Barra]]></surname>
<given-names><![CDATA[Jorge]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Paz-Pellat]]></surname>
<given-names><![CDATA[Fernando]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma del Estado de México  ]]></institution>
<addr-line><![CDATA[Toluca de Lerdo Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias  ]]></institution>
<addr-line><![CDATA[Celaya Guanajuato]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Colegio de Postgraduados Laboratorio de Fertilidad de Suelos y Química Ambiental ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Colegio de Postgraduados  ]]></institution>
<addr-line><![CDATA[Texcoco Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2022</year>
</pub-date>
<volume>40</volume>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0187-57792022000100121&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0187-57792022000100121&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0187-57792022000100121&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: La formación de suelos a partir de capas endurecidas de origen volcánico -tepetates- roturadas, depende del sistema de manejo que se utiliza para su habilitación a un uso agrícola o pecuario, por lo que el desarrollo de modelos que permitan entender la transformación de las unidades estructurales, de fragmentos a agregados, reviste gran importancia. Desde esta perspectiva, en el presente trabajo se propone y justifica el uso de un modelo de cinética de orden n, para modelar la distribución de la masa y carbono orgánico en las unidades estructurales de tepetates bajo cultivo y predecir su evolución hacia la formación de suelo. La validación del modelo y las relaciones propuestas, se realizaron a partir de la comparación de la dinámica de estructuración en tepetate, con diferentes casos de estudio, que incluyen sustratos con características diferentes, como suelos, suelos degradados y marga. Los resultados de la modelación fueron altamente favorables (R2 &gt; 0.98). La evolución temporal del agente cementante en los sustratos -el carbono orgánico-así como la estabilidad estructural, de acuerdo con el modelo propuesto definen patrones que se asocian directamente la evolución de la formación de suelo con el nivel de agregación. En experimentos de corto plazo (&#8804; 2 años), los análisis destacan la participación de otros agentes, además del carbono orgánico, que controlan los mecanismos de agregación, por lo que se planteó una extensión del modelo propuesto, para considerar este escenario.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Summary: The formation of soils from hardened layers of volcanic origin -tepetates- broken, depends on the management system that is used to enable it to be implemented for agricultural or livestock use, so the development of models that allow understanding the transformation of structural units, from fragments to aggregates, is of great importance. From this perspective, the present work proposes and justifies the use of a kinetic model of order n, to model the distribution of mass and organic carbon in the structural units of tepetates under cultivation and predict their evolution towards soil formation. The validation of the model and the proposed relationships were carried out from the comparison of the dynamics of structuring in tepetate, with different case studies, which include substrates with different characteristics, such as soils, degraded soil and loamy marl. The modeling results were highly favorable (R2 &gt; 0.98). The temporal evolution of the cementing agent in the substrates -organic carbon- as well as structural stability, according to the proposed model define patterns that are directly associated with the evolution of soil formation with the level of aggregation. In short-term experiments (&#8804; 2 years), the analyses highlight the participation of other agents, in addition to organic carbon, that control the mechanisms of aggregation, so an extension of the proposed model was reviewed, to consider this scenario.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[agregados y fragmentos]]></kwd>
<kwd lng="es"><![CDATA[cinética de orden n]]></kwd>
<kwd lng="es"><![CDATA[experimentos de corto plazo]]></kwd>
<kwd lng="es"><![CDATA[materiales endurecidos]]></kwd>
<kwd lng="es"><![CDATA[relación masa y carbono orgánico]]></kwd>
<kwd lng="en"><![CDATA[aggregates and fragments]]></kwd>
<kwd lng="en"><![CDATA[n-order kinetics]]></kwd>
<kwd lng="en"><![CDATA[short-term experiments]]></kwd>
<kwd lng="en"><![CDATA[endured materials]]></kwd>
<kwd lng="en"><![CDATA[mass and organic carbon relationship]]></kwd>
</kwd-group>
</article-meta>
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