<?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>2215-2504</journal-id>
<journal-title><![CDATA[Revista Forestal Mesoamericana Kurú]]></journal-title>
<abbrev-journal-title><![CDATA[Kurú]]></abbrev-journal-title>
<issn>2215-2504</issn>
<publisher>
<publisher-name><![CDATA[Instituto Tecnológico de Costa Rica]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2215-25042019000200002</article-id>
<article-id pub-id-type="doi">10.18845/rfmk.v16i39.4406</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Selección de una ecuación volumétrica para Eucalyptus urophylla S.T. Blake en la región central del estado de Goiás, Brasil]]></article-title>
<article-title xml:lang="en"><![CDATA[Selection of a volumetric equation for Eucalyptus urophylla S.T. Blake in the central region of the state of Goiás, Brazil]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Imaña-Encinas]]></surname>
<given-names><![CDATA[José]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Antunes-Santana]]></surname>
<given-names><![CDATA[Otacílio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Riesco-Muñoz]]></surname>
<given-names><![CDATA[Guillermo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Brasilia  ]]></institution>
<addr-line><![CDATA[Brasilia ]]></addr-line>
<country>Brazil</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universida de Federal de Pernambuco Departamento de Biofísica y Radiobiología ]]></institution>
<addr-line><![CDATA[Recife ]]></addr-line>
<country>Brazil</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad de Santiago de Compostela Escuela Politécnica Superior de Ingeniería ]]></institution>
<addr-line><![CDATA[La Coruña ]]></addr-line>
<country>España</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2019</year>
</pub-date>
<volume>16</volume>
<numero>39</numero>
<fpage>2</fpage>
<lpage>9</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S2215-25042019000200002&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S2215-25042019000200002&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S2215-25042019000200002&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Fueron medidos, apeados y troceados 1545 árboles de Eucalyptus urophylla S.T. Blake con la finalidad de seleccionar ecuaciones volumétricas con una y dos variables independientes. La muestra de la validación cruzada fue en 310 árboles. Fueron empleadas las variables dendrométricas diámetro normal y altura total del árbol para ajustar ecuaciones volumétricas en una plantación de E. urophylla destinada a la producción de leña y en edad de cosecha. Los criterios de selección fueron los estadísticos: coeficiente de determinación ajustado, error padrón de la estimación, distribución gráfica de residuos e índice de Furnival. De siete ecuaciones ensayadas con una variable dendrométrica, la seleccionada fue la ecuación de Hohenadl-Krenn (v=ß0+ß1d+ß2d2), que obtuvo la mayor fiabilidad estadística, presentando el mejor ajuste (R2 aj = 0,98, Sx = 0,06 e IF = 0,01). Su expresión matemática fue: v= 21,5461 + 4,4448&#8729;d + 0,2247&#8729;d2. De los nueve modelos ensayados que consideraron dos variables dendrométricas la ecuación de Meyer log v=ß0+ß1d+ß2d2+ß3dh+ß4d2h+ß5h presentó el mejor ajuste. Sin embargo, en eficiencia fue inferior al compararla con la ecuación de Hohenadl-Krenn.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract 1545 trees of Eucalyptus urophylla S.T. Blake were measured, felled and scaled with the purpose to select a wood volume equation with one and two independent variables. The cross-validation sample was done in 310 trees. The objective of this work was to select and to test tree stem volume equations with one and two independent dendrometrical variables (breast height diameter and height) to be used in a Eucalyptus urophylla plantation at the rotation age for firewood production. Selection criteria were the adjusted coefficient of determination, estimated standard error, graphic distribution of waste and the Furnival index. From seven tested equations with one dendrometrical variable, the Hohenadl-Krenn model (v=ß0+ß1d+ß2d2) showed the highest statistical reliability and it presented the best fit (R2 aj = 0.98, Sx = 0.06 e IF = 0.01), producing the regression equation: v = 21.5461 + 4.4448·d + 0.2247·d2. From the other nine volume models that were considered, the two variable Meyer equation (v=ß0+ß1d+ß2d2+ß3dh+ß4d2h+ß5h) presented the best fit, but lower than the Hohenadl-Krenn model.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Forest mensuration]]></kwd>
<kwd lng="en"><![CDATA[dendrometrical variable]]></kwd>
<kwd lng="en"><![CDATA[regression analysis]]></kwd>
<kwd lng="en"><![CDATA[volume equation]]></kwd>
<kwd lng="es"><![CDATA[Mensura forestal]]></kwd>
<kwd lng="es"><![CDATA[variable dendrométrica]]></kwd>
<kwd lng="es"><![CDATA[análisis de regresión]]></kwd>
<kwd lng="es"><![CDATA[tarifa de cubicación]]></kwd>
<kwd lng="es"><![CDATA[tarifa de ordenación]]></kwd>
</kwd-group>
</article-meta>
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