<?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>1405-3195</journal-id>
<journal-title><![CDATA[Agrociencia]]></journal-title>
<abbrev-journal-title><![CDATA[Agrociencia]]></abbrev-journal-title>
<issn>1405-3195</issn>
<publisher>
<publisher-name><![CDATA[Colegio de Postgraduados]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1405-31952018000701013</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Funciones de ahusamiento para clones de Eucalyptus urophylla establecidos en plantaciones comerciales en Huimanguillo, Tabasco, México]]></article-title>
<article-title xml:lang="en"><![CDATA[Taper functions for Eucalyptus urophylla clones established in commercial plantations in Huimanguillo, Tabasco, Mexico]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández-Ramos]]></surname>
<given-names><![CDATA[Jonathan]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Santos-Posadas]]></surname>
<given-names><![CDATA[Héctor M. De los]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Valdéz-Lazalde]]></surname>
<given-names><![CDATA[José R.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Tamarit-Urias]]></surname>
<given-names><![CDATA[Juan C.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ángeles-Pérez]]></surname>
<given-names><![CDATA[Gregorio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández-Ramos]]></surname>
<given-names><![CDATA[Adrián]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Peduzzi]]></surname>
<given-names><![CDATA[Alicia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Colegio de Postgraduados Campus Montecillo ]]></institution>
<addr-line><![CDATA[Montecillo 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[ Puebla]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,United States Department of Agriculture Forest, Service  ]]></institution>
<addr-line><![CDATA[Ogden Utah]]></addr-line>
<country>USA</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>11</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>11</month>
<year>2018</year>
</pub-date>
<volume>52</volume>
<numero>7</numero>
<fpage>1013</fpage>
<lpage>1029</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1405-31952018000701013&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1405-31952018000701013&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1405-31952018000701013&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Las funciones de ahusamiento permiten modelar el perfil fustal, estimar las dimensiones de las secciones del árbol y el volumen maderable por tipo de productos, así como planear el abastecimiento forestal. El objetivo de este estudio fue desarrollar una función que permitiera modelar el perfil fustal de árboles clonales de Eucalyptus urophylla S. T. Blake establecidos con fines comerciales en Huimanguillo, Tabasco, México. Con 2,133 pares de datos de 93 árboles se ajustaron diez modelos de ahusamiento con el método de máxima verosimilitud. El mejor modelo se seleccionó de acuerdo con los valores menores de la raiz del cuadrado medio del error (RCME), el coeficiente de variación, el sesgo y el mayor coeficiente de determinación ajustado (R2aj.); el modelo polinomial de quinto orden fue el mejor estadísticamente para modelar el perfil fustal de clones de E. urophylla, porque incluye la proporción relativa de la altura en cada sección en la altura total. La autocorrelación se corrigió al incluir en el ajuste una estructura de autocorrelación de tipo CAR(1). El modelo polinomial estima de forma confiable el diámetro y la altura en árboles clonales provenientes de plantaciones comerciales de E. urophylla.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Taper functions allow modelling stem profile, estimating the dimensions of tree sections and the timber-yielding volume per type of products, and planning forest supply. The objective of this study was to develop a function that allows modelling the stem profile of Eucalyptus urophylla S. T. Blake clone trees established with commercial purposes in Huimanguillo, Tabasco, Mexico. With 2,133 pairs of data from 93 trees, ten taper models were fitted with the maximum likelihood method. The best model was selected according to the lowest values of the root mean square error (RMSE), the coefficient of variation, the bias and the highest adjusted coefficient of determination (R2 aj.). The fifth-degree polynomial model was the best statistically to model the stem profile of E. urophylla clones, because it includes the relative proportion of the height in each section of the total height. Autocorrelation was corrected by including in the fiiting a CAR(1) type autocorrelation structure. The polynomial model estimates in a reliable way the diameter and the height in clone trees from commercial plantations of E. urophylla.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Perfil fustal]]></kwd>
<kwd lng="es"><![CDATA[volumen comercial]]></kwd>
<kwd lng="es"><![CDATA[clones de eucalipto]]></kwd>
<kwd lng="es"><![CDATA[aprovechamiento forestal]]></kwd>
<kwd lng="es"><![CDATA[Eucalyptus urophylla]]></kwd>
<kwd lng="en"><![CDATA[Log profile]]></kwd>
<kwd lng="en"><![CDATA[commercial volumen]]></kwd>
<kwd lng="en"><![CDATA[eucalyptus clones]]></kwd>
<kwd lng="en"><![CDATA[forest exploitation]]></kwd>
<kwd lng="en"><![CDATA[Eucalyptus urophylla]]></kwd>
</kwd-group>
</article-meta>
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