<?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>S2215-25042024000200052</article-id>
<article-id pub-id-type="doi">10.18845/rfmk.v21i49.7255</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Factor de Forma Flexible para Estimaciones Volumétricas Más Precisas y Menos Sesgadas: Estudio de Caso de Eucalyptus spp.]]></article-title>
<article-title xml:lang="en"><![CDATA[Flexible Form Factor for More Accurate and Less Biased Volumetric Estimates: A Case Study of Eucalyptus spp.]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Guera]]></surname>
<given-names><![CDATA[Ouorou Ganni Mariel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Moreira]]></surname>
<given-names><![CDATA[Francisco Tibério de Alencar]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Silva]]></surname>
<given-names><![CDATA[José Antônio Aleixo da]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ferreira]]></surname>
<given-names><![CDATA[Rinaldo Luiz Caraciolo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Jossefa]]></surname>
<given-names><![CDATA[Célio Gregório de Vasconcelos]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Centro Internacional de Mejoramiento de Maíz y Trigo (CIMMYT)  ]]></institution>
<addr-line><![CDATA[Texcoco Estado de México]]></addr-line>
<country>México</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidade Federal Rural de Pernambuco Laboratório de Biometria e Manejo Florestal ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Brazil</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,High Polytechnic Institute of Manica  ]]></institution>
<addr-line><![CDATA[ Manica Province]]></addr-line>
<country>Mozambique</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2024</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2024</year>
</pub-date>
<volume>21</volume>
<numero>49</numero>
<fpage>52</fpage>
<lpage>61</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S2215-25042024000200052&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S2215-25042024000200052&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S2215-25042024000200052&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Las especies del género Eucalyptus se cultivan ampliamente en Brasil debido a su alta productividad, ciclo de rotación relativamente corto y la variedad de productos que ofrecen. La estimación del volumen del árbol en pie se realiza comúnmente con el factor de forma artificial (volumen real/volumen del cilindro). Sin embargo, este método puede generar estimaciones poco precisas y sesgadas, induciendo a la toma de decisiones inapropiadas en el manejo de las plantaciones. Este estudio describe un factor de forma flexible y las consideraciones para su implementación para diferentes especies. Se utilizó el método Smalian para determinar los volúmenes reales de 2198 árboles de Eucalyptus spp. Se estimó el factor de forma artificial y el factor de forma flexible de Silva, Borders y Brister cuyas constantes de proporcionalidad se determinaron con funciones de densidad de probabilidad. El factor de forma artificial estimado a 0.53 tuvo estimaciones de volumen poco precisas y sesgadas, mientras que el flexible con una constante de 0.55 produjo estimaciones precisas y no sesgadas.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Eucalyptus species are widely cultivated in Brazil due to their high productivity, relatively short rotation cycle, and the variety of products they offer. The estimation of tree volume is commonly done using the artificial form factor (real volume / cylinder volume). However, this method may result in inaccurate and biased estimates, leading to incorrect decisions in plantation management. This study describes a flexible form factor and some considerations for its implementation for different species. The Smalian method was used to determine the real volumes in 2198 eucalyptus trees. The artificial form factor and the flexible form factor of Silva, Borders and Brister were estimated with their proportionality constants determined using probability density functions. The artificial form factor, estimated at 0.53, produced inaccurate and biased volume estimates, whereas the flexible form factor, with a constant of 0.55, produced accurate and unbiased estimates.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Volume of Standing Trees]]></kwd>
<kwd lng="en"><![CDATA[Smalian method]]></kwd>
<kwd lng="en"><![CDATA[Brazil]]></kwd>
<kwd lng="es"><![CDATA[Volumen de árboles en pie]]></kwd>
<kwd lng="es"><![CDATA[método de Smalian]]></kwd>
<kwd lng="es"><![CDATA[Brasil]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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