<?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>2310-3469</journal-id>
<journal-title><![CDATA[Revista Cubana de Ciencias Forestales]]></journal-title>
<abbrev-journal-title><![CDATA[Rev cubana ciencias forestales]]></abbrev-journal-title>
<issn>2310-3469</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Pinar del Río Hermanos Saíz Montes de Oca]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2310-34692021000200193</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Evaluación preliminar de la eficacia del método con probabilidad variable en bosque de Miombo]]></article-title>
<article-title xml:lang="pt"><![CDATA[Avaliação preliminar da eficácia do método da probabilidade variável na floresta de Miombo]]></article-title>
<article-title xml:lang="en"><![CDATA[Preliminary evaluation of the efficacy of the variable probability method in Miombo woodland]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Frías Tamayo]]></surname>
<given-names><![CDATA[Marisela]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pereira Jay]]></surname>
<given-names><![CDATA[Nheza Filomena]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Aldana Pereira]]></surname>
<given-names><![CDATA[Edilio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Pinar del Río "Hermanos Saíz Montes de Oca"  ]]></institution>
<addr-line><![CDATA[Pinar del Río ]]></addr-line>
<country>Cuba</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>08</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>08</month>
<year>2021</year>
</pub-date>
<volume>9</volume>
<numero>2</numero>
<fpage>193</fpage>
<lpage>204</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S2310-34692021000200193&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S2310-34692021000200193&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S2310-34692021000200193&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN En la investigación, se analizaron tres factores de área basal conforme el fundamento teórico del muestreo con probabilidad variable, con el objetivo de evaluar preliminarmente la efectividad del método de probabilidad variable de Bitterlich para la estimación del área basal en bosques de la formación de Miombo. Mediante un muestreo sistemático se establecieron 11 parcelas temporales circulares de área fija de 500 m2. En el centro de cada una de estas parcelas, se establecieron los puntos de medición con relascopio de espejos, donde se utilizaron los factores de área basal (FAB) 1, 2 y 4. Se tomaron como referencias las parcelas de área fija y se compararon los resultados para lo cual se realizó el análisis con el paquete estadístico SPSS para Windows Versión 19.0. No se presentaron diferencias significativas de los resultados de áreas basales obtenidos entre los diferentes factores de área basal 1, 2 y 4, con respecto a los obtenidos en las parcelas de áreas fijas. En el análisis del tiempo, el factor de área basal número cuatro resultó el mejor con la menor cantidad de minutos durante la medición de la unidad de muestreo.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[RESUMO Nesta investigação, foram analisados três factors de área basal de acordo com a base teórica da amostragem de probabilidade variável, a fim de avaliar preliminarmente a eficácia do método de probabilidade variável de Bitterlich para a estimativa da área basal nas florestas de formação de Miombo. Onze parcelas circulares temporárias de área fixa de 500 m2 foram estabelecidas por meio de amostragem sistemática. No centro de cada uma destas parcelas, os pontos de medição foram estabelecidos com um relascópio espelho, onde foram utilizados os fatores de área basal (FAB) 1, 2 e 4. As parcelas de área fixa foram tomadas como referência e os resultados foram comparados para os quais a análise foi realizada com o pacote estatístico SPSS para Windows Versão 19.0. Não houve diferenças significativas nos resultados das áreas basais obtidos entre os diferentes fatores de área basal 1, 2 e 4, em relação aos obtidos nas parcelas de áreas fixas. Na análise temporal, o factor de área basal número quatro foi o melhor com a menor quantidade de minutos durante a medição da unidade de amostragem.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT In the research, three factors of basal area were analyzed according to the theoretical basis of sampling with variable probability, with the objective of preliminarily evaluating the effectiveness of Bitterlich's variable probability method for the estimation of basal area in forests of the Miombo formation. By means of systematic sampling, 11 temporary circular plots of fixed area of 500 m2 were established. In the center of each of these plots, measurement points were established with a mirror relascope, where the basal area factors (FAB) 1, 2 and 4 were used. The fixed area plots were taken as references and the results were compared for which the analysis was performed with the statistical package SPSS for Windows Version 19.0. There were no significant differences in the results of basal areas obtained between the different factors of basal area 1, 2 and 4, with respect to those obtained in the plots of fixed areas. In the time analysis, basal area factor number four was the best with the least number of minutes during the measurement of the sampling unit.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Muestreo puntual horizontal]]></kwd>
<kwd lng="es"><![CDATA[Área basal]]></kwd>
<kwd lng="es"><![CDATA[Muestreo sistemático]]></kwd>
<kwd lng="es"><![CDATA[Miombo.]]></kwd>
<kwd lng="pt"><![CDATA[Amostragem pontual horizontal]]></kwd>
<kwd lng="pt"><![CDATA[Área basal]]></kwd>
<kwd lng="pt"><![CDATA[Amostragem sistemática]]></kwd>
<kwd lng="pt"><![CDATA[Miombo.]]></kwd>
<kwd lng="en"><![CDATA[Horizontal point sampling]]></kwd>
<kwd lng="en"><![CDATA[Basal area]]></kwd>
<kwd lng="en"><![CDATA[Systematic sampling]]></kwd>
<kwd lng="en"><![CDATA[Miombo.]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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