<?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>1405-0471</journal-id>
<journal-title><![CDATA[Madera y bosques]]></journal-title>
<abbrev-journal-title><![CDATA[Madera bosques]]></abbrev-journal-title>
<issn>1405-0471</issn>
<publisher>
<publisher-name><![CDATA[Instituto de Ecología A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1405-04712020000200211</article-id>
<article-id pub-id-type="doi">10.21829/myb.2020.2621934</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Enfoque multivariado en experimentos de extracción de madera en plantaciones forestales]]></article-title>
<article-title xml:lang="en"><![CDATA[Multivariate approach in timber harvesting experiments in forest plantations]]></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"/>
</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[Álvarez Lazo]]></surname>
<given-names><![CDATA[Daniel Alberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Barrero Medel]]></surname>
<given-names><![CDATA[Héctor]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Díaz Pita]]></surname>
<given-names><![CDATA[Andrés Loreto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidade Federal Rural de Pernambuco Departamento de Ciência Florestal Laboratorio de Biometria e Manejo Forestal]]></institution>
<addr-line><![CDATA[Recife Pernambuco]]></addr-line>
<country>Brazil</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Pinar del Río Hermanos Saíz Montes de Oca Departamento Forestal]]></institution>
<addr-line><![CDATA[Pinar del Río ]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad de Pinar del Río Hermanos Saíz Montes de Oca Departamento Agropecuario]]></institution>
<addr-line><![CDATA[Pinar del Río ]]></addr-line>
<country>Cuba</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2020</year>
</pub-date>
<volume>26</volume>
<numero>2</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1405-04712020000200211&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1405-04712020000200211&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1405-04712020000200211&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El presente trabajo se realizó con el objetivo de evaluar, técnica y económicamente la extracción de madera en plantaciones de Pinus caribaea var. caribaea de la empresa forestal Macurije, ubicada en la provincia de Pinar del Río, Cuba. Para ello, se llevaron a cabo estudios de tiempos y movimientos teniendo como criterios de evaluación "productividad" y "costo unitario" de extracción de la madera. La evaluación del desempeño de los tractores articulados (skidders) y de las yuntas de bueyes en diferentes sistemas de aprovechamiento y clases de pendiente se realizó por medio de experimentos factoriales (3 × 3 × 2) univariados y multivariados (costo unitario e/o productividad), siguiendo un diseño al azar en bloques (B1 = 21 años y B2 = 32 años), con los factores "maquinaria" y "pendiente" con tres niveles y "sistema de aprovechamiento" con dos niveles. Se evidenciaron la viabilidad y la utilidad del enfoque multivariado en la evaluación de la extracción de madera; es más viable extraer la madera con el sistema de tronco entero en plantaciones de 32 años. La interacción maquinaria-pendiente tuvo influencia significativa en la variación del conjunto costo-productividad. El skidder John Deere 548E, por presentar menor costo unitario y mayor productividad que el J-80A, es el recomendado para la extracción semimecanizada de la madera. El más viable es la yunta de bueyes por su mayor rentabilidad. Sin embargo, por su baja productividad, solo podrá ser utilizado en combinación con otras máquinas o en periodos de producción desacelerada. Su uso exclusivo no es práctico ya que implicaría aumentar significativamente su cantidad para compensar su baja productividad.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract This work was carried out with the objective of evaluating, technically and economically, timber extraction in plantations of Pinus caribaea var. caribaea of Macurije forest company located in the province of Pinar del Río, Cuba. For this, time and movement studies were carried out using "productivity" and "unit cost" of wood extraction as evaluation criteria. The skidders and oxen performance evaluation, in different harvest systems and slope classes, was performed through univariate and multivariate (cost and/or productivity) factorial experiments (3 × 3 × 2), following a randomized block design (B1 = 21 years and B2 = 32 years), with the factors "machinery" and "slope" with three and "harvest systems" with two levels. The feasibility and usefulness of the multivariate approach in the evaluation of timber extraction were evidenced; timber extraction is more viable with the tree length harvest systems in stands of 32 years. The interaction machinery-slope had a significant influence on the variation of the whole cost-productivity. The John Deere 548E skidder, for presenting lower unit cost and higher productivity than the J-80A, is recommended for semi-mechanized timber extraction. The most viable is the yoke of oxen because of its greater profitability. However, due to its low productivity, it can only be used in combination with other machines or during periods of decelerated production. Its exclusive use is impracticable since it would imply significantly increasing its quantity to compensate for its low productivity.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[aprovechamiento forestal]]></kwd>
<kwd lng="es"><![CDATA[Cuba]]></kwd>
<kwd lng="es"><![CDATA[costo unitario]]></kwd>
<kwd lng="es"><![CDATA[arreglo factorial multivariado]]></kwd>
<kwd lng="es"><![CDATA[productividad]]></kwd>
<kwd lng="en"><![CDATA[forest harvesting]]></kwd>
<kwd lng="en"><![CDATA[Cuba]]></kwd>
<kwd lng="en"><![CDATA[unit cost]]></kwd>
<kwd lng="en"><![CDATA[multivariate factorial arrangement]]></kwd>
<kwd lng="en"><![CDATA[productivity]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Barnes]]></surname>
<given-names><![CDATA[R. M.]]></given-names>
</name>
</person-group>
<source><![CDATA[Estudos de movimentos e de tempos: projeto e medida do trabalho]]></source>
<year>1977</year>
<edition>6a</edition>
<publisher-loc><![CDATA[São Paulo ]]></publisher-loc>
<publisher-name><![CDATA[E. Blucher]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B2">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Behjou]]></surname>
<given-names><![CDATA[F. K.]]></given-names>
</name>
<name>
<surname><![CDATA[Majnounian]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
<name>
<surname><![CDATA[Namiranian]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Dvo&#345;ák]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Time study and skidding capacity of the wheeled skidderTimberjack 450C in Caspian forests]]></article-title>
<source><![CDATA[Journal of Forest Science]]></source>
<year>2008</year>
<volume>54</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>183-8</page-range></nlm-citation>
</ref>
<ref id="B3">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Box]]></surname>
<given-names><![CDATA[G. E. P.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A general distribution theory for a class of likelihood criteria]]></article-title>
<source><![CDATA[Biometrika]]></source>
<year>1949</year>
<volume>36</volume>
<numero>3-4</numero>
<issue>3-4</issue>
<page-range>317-46</page-range></nlm-citation>
</ref>
<ref id="B4">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bray]]></surname>
<given-names><![CDATA[J. H.]]></given-names>
</name>
<name>
<surname><![CDATA[Maxwell]]></surname>
<given-names><![CDATA[S.E.]]></given-names>
</name>
</person-group>
<source><![CDATA[Multivariate analysis of variance]]></source>
<year>1985</year>
<page-range>07-054</page-range><publisher-loc><![CDATA[Newbury Park, CA ]]></publisher-loc>
<publisher-name><![CDATA[Sage]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B5">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Cándano]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
</person-group>
<source><![CDATA[Aprovechamiento forestal]]></source>
<year>2003</year>
<publisher-loc><![CDATA[Pinar del Rio, Cuba ]]></publisher-loc>
<publisher-name><![CDATA[Editorial Científico Técnica]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B6">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Cándano]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
</person-group>
<source><![CDATA[Propuesta para el perfeccionamiento de la tecnología de aprovechamiento de madera en rodales de Pinus caribaea en la provincia de Pinar del Río]]></source>
<year>1998</year>
<publisher-loc><![CDATA[Pinar del Rio, Cuba ]]></publisher-loc>
<publisher-name><![CDATA[Universidad de Pinar del Rio]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B7">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[&#272;uka]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Pentek]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
<name>
<surname><![CDATA[Horvat]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[Por&#353;insky]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Modelling of Downhill timber skidding: bigger load - bigger slope]]></article-title>
<source><![CDATA[Croatian Journal of Forest Engineering]]></source>
<year>2016</year>
<volume>37</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>139-50</page-range></nlm-citation>
</ref>
<ref id="B8">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Dykstra]]></surname>
<given-names><![CDATA[D.P.]]></given-names>
</name>
<name>
<surname><![CDATA[Heinrich]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<source><![CDATA[FAO Model code of forest harvesting practice]]></source>
<year>1996</year>
<publisher-loc><![CDATA[Rome, Italy ]]></publisher-loc>
<publisher-name><![CDATA[FAO]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B9">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Elliasson]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Simulation of thinning with a single-grip harvester]]></article-title>
<source><![CDATA[Forest Science]]></source>
<year>1999</year>
<volume>45</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>26-34</page-range></nlm-citation>
</ref>
<ref id="B10">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ezzati]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Najafi]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Durston]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Impact of animal logging on soil physical properties in mule trail in Hyrcanian forests]]></article-title>
<source><![CDATA[Transportation Research Part D: Transport and Environment]]></source>
<year>2011</year>
<volume>16</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>316-20</page-range></nlm-citation>
</ref>
<ref id="B11">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Guera]]></surname>
<given-names><![CDATA[O. G. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Silva]]></surname>
<given-names><![CDATA[J. A. A. da]]></given-names>
</name>
<name>
<surname><![CDATA[Ferreira]]></surname>
<given-names><![CDATA[R. L. C.]]></given-names>
</name>
<name>
<surname><![CDATA[Álvarez]]></surname>
<given-names><![CDATA[L. D.]]></given-names>
</name>
<name>
<surname><![CDATA[Barrero]]></surname>
<given-names><![CDATA[M. H.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Modelos matemáticos para la determinación del turno óptimo en plantaciones forestales]]></article-title>
<source><![CDATA[Madera y Bosques]]></source>
<year>2019</year>
<volume>25</volume>
<numero>1</numero>
<issue>1</issue>
</nlm-citation>
</ref>
<ref id="B12">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Hair Jr]]></surname>
<given-names><![CDATA[J. F.]]></given-names>
</name>
<name>
<surname><![CDATA[Anderson]]></surname>
<given-names><![CDATA[R. E.]]></given-names>
</name>
<name>
<surname><![CDATA[Tatham]]></surname>
<given-names><![CDATA[R. L.]]></given-names>
</name>
<name>
<surname><![CDATA[Black]]></surname>
<given-names><![CDATA[W.C.]]></given-names>
</name>
</person-group>
<source><![CDATA[Análise multivariada de dados]]></source>
<year>2005</year>
<edition>5a</edition>
<publisher-loc><![CDATA[Porto Alegre ]]></publisher-loc>
<publisher-name><![CDATA[Bookman]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B13">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Hiesl]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[Benjamin]]></surname>
<given-names><![CDATA[J. G.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Applicability of international harvesting equipment productivity studies in Maine, USA: A Literature Review]]></article-title>
<source><![CDATA[Forests]]></source>
<year>2013</year>
<volume>4</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>898-921</page-range></nlm-citation>
</ref>
<ref id="B14">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Holtzscher]]></surname>
<given-names><![CDATA[M. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Lanford]]></surname>
<given-names><![CDATA[B.L.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Tree diameter effects on cost and productivity of cut-to-length systems]]></article-title>
<source><![CDATA[Forest Products Journal]]></source>
<year>1997</year>
<volume>47</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>25-30</page-range></nlm-citation>
</ref>
<ref id="B15">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Hotelling]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The Generalization of Student&#8217;s Ratio]]></article-title>
<source><![CDATA[The Annals of Mathematical Statistics]]></source>
<year>1931</year>
<volume>2</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>360-78</page-range></nlm-citation>
</ref>
<ref id="B16">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Kutner]]></surname>
<given-names><![CDATA[M. H.]]></given-names>
</name>
<name>
<surname><![CDATA[Nachtsheim]]></surname>
<given-names><![CDATA[C. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Neter]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Li]]></surname>
<given-names><![CDATA[W.]]></given-names>
</name>
</person-group>
<source><![CDATA[Applied linear statistical models]]></source>
<year>2005</year>
<publisher-name><![CDATA[McGraw-Hill/Irwin]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B17">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Lago]]></surname>
<given-names><![CDATA[M. J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Referencia de Procli]]></source>
<year>2013</year>
</nlm-citation>
</ref>
<ref id="B18">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Leite]]></surname>
<given-names><![CDATA[E. S.]]></given-names>
</name>
<name>
<surname><![CDATA[Minette]]></surname>
<given-names><![CDATA[L. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Fernandes]]></surname>
<given-names><![CDATA[H.C.]]></given-names>
</name>
<name>
<surname><![CDATA[Souza]]></surname>
<given-names><![CDATA[A.P.]]></given-names>
</name>
<name>
<surname><![CDATA[Amaral]]></surname>
<given-names><![CDATA[E. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Lacerda]]></surname>
<given-names><![CDATA[E. G.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Desempenho do harvester na colheita de eucalipto em diferentes espaçamentos e declividades]]></article-title>
<source><![CDATA[Revista Árvore]]></source>
<year>2014</year>
<volume>38</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>95-102</page-range></nlm-citation>
</ref>
<ref id="B19">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Levene]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Robust tests for equality of variances]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Olkin]]></surname>
<given-names><![CDATA[I.]]></given-names>
</name>
</person-group>
<source><![CDATA[Contributions to probability and statistics: essays in honor of Harold Hotelling]]></source>
<year>1960</year>
<page-range>278-92</page-range><publisher-name><![CDATA[Palo Alto Stanford University Press]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B20">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Lopes]]></surname>
<given-names><![CDATA[E.S. Da]]></given-names>
</name>
<name>
<surname><![CDATA[Diniz]]></surname>
<given-names><![CDATA[C. C. C.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Produtividade do trator florestal chocker skidder na extração de madeira em terrenos declivosos]]></article-title>
<source><![CDATA[Floresta]]></source>
<year>2015</year>
<volume>45</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>625-34</page-range></nlm-citation>
</ref>
<ref id="B21">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Lopes]]></surname>
<given-names><![CDATA[E. S.]]></given-names>
</name>
<name>
<surname><![CDATA[Missel]]></surname>
<given-names><![CDATA[J. W. P.]]></given-names>
</name>
<name>
<surname><![CDATA[Dias]]></surname>
<given-names><![CDATA[A. N.]]></given-names>
</name>
<name>
<surname><![CDATA[Fiedler]]></surname>
<given-names><![CDATA[N. C.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Avaliação técnica do trator florestal arrastador "skidder" com diferentes tipos de rodados na extração de madeira em povoamentos de pinus]]></article-title>
<source><![CDATA[Revista Árvore]]></source>
<year>2007</year>
<volume>31</volume>
<numero>6</numero>
<issue>6</issue>
<page-range>1053-61</page-range></nlm-citation>
</ref>
<ref id="B22">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Lopes]]></surname>
<given-names><![CDATA[E. S.]]></given-names>
</name>
<name>
<surname><![CDATA[Sampietro]]></surname>
<given-names><![CDATA[J. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Lombardi]]></surname>
<given-names><![CDATA[K. C.]]></given-names>
</name>
<name>
<surname><![CDATA[Dias]]></surname>
<given-names><![CDATA[A. N.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Avaliação da umidade na compactação do solo submetido ao tráfego de máquinas de colheita florestal]]></article-title>
<source><![CDATA[Revista Árvore]]></source>
<year>2011</year>
<volume>35</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>659-67</page-range></nlm-citation>
</ref>
<ref id="B23">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Machado]]></surname>
<given-names><![CDATA[C. C.]]></given-names>
</name>
</person-group>
<source><![CDATA[Colheita florestal]]></source>
<year>2014</year>
<publisher-loc><![CDATA[Minas Gerais ]]></publisher-loc>
<publisher-name><![CDATA[Editora UFV]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B24">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Machado]]></surname>
<given-names><![CDATA[C.C.]]></given-names>
</name>
<name>
<surname><![CDATA[Lopes]]></surname>
<given-names><![CDATA[E.S.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Análise da influência do comprimento de toras de eucalipto na produtividade e custo da colheita e transporte florestal]]></article-title>
<source><![CDATA[Cerne]]></source>
<year>2000</year>
<volume>6</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>124-9</page-range></nlm-citation>
</ref>
<ref id="B25">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Mardia]]></surname>
<given-names><![CDATA[K. V.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Measures of multivariate skewness and kurtosis with applications]]></article-title>
<source><![CDATA[Biometrika]]></source>
<year>1970</year>
<volume>57</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>519-30</page-range></nlm-citation>
</ref>
<ref id="B26">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Maroco]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Análise Estatística - Com Utilização do SPSS]]></source>
<year>2007</year>
<edition>3a</edition>
<publisher-loc><![CDATA[Lisboa ]]></publisher-loc>
<publisher-name><![CDATA[Edições Sílabo]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B27">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Medel]]></surname>
<given-names><![CDATA[H. B.]]></given-names>
</name>
<name>
<surname><![CDATA[Equino]]></surname>
<given-names><![CDATA[O. P.]]></given-names>
</name>
<name>
<surname><![CDATA[Lazo]]></surname>
<given-names><![CDATA[D. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Guera]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Determinación del turno de corta para Pinus caribaea var. caribaea en la Empresa Forestal Integral "Macurije"]]></article-title>
<source><![CDATA[Floresta e Ambiente]]></source>
<year>2011</year>
<volume>18</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>109-16</page-range></nlm-citation>
</ref>
<ref id="B28">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Mousavi]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Effect of log length on productivity and cost of Timberjack 450C skidder in the Hyrcanian forest in Iran]]></article-title>
<source><![CDATA[Journal of forest science]]></source>
<year>2012</year>
<volume>58</volume>
<numero>11</numero>
<issue>11</issue>
<page-range>473-82</page-range></nlm-citation>
</ref>
<ref id="B29">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[O'rourke]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
<name>
<surname><![CDATA[Hatcher]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
<name>
<surname><![CDATA[Stepanski]]></surname>
<given-names><![CDATA[E.J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Using SAS for Univariate and Multivariate Statistics]]></source>
<year>2005</year>
<publisher-loc><![CDATA[Cary, NC ]]></publisher-loc>
<publisher-name><![CDATA[SAS Institute, Inc.]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B30">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Pereira]]></surname>
<given-names><![CDATA[A. L. N.]]></given-names>
</name>
<name>
<surname><![CDATA[Lopes]]></surname>
<given-names><![CDATA[E. S.]]></given-names>
</name>
<name>
<surname><![CDATA[Dias]]></surname>
<given-names><![CDATA[A. N.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Análise técnica e de custo do feller buncher e skidder na colheita de madeira em diferentes produtividades do povoamento]]></article-title>
<source><![CDATA[Ciência Florestal]]></source>
<year>2015</year>
<volume>25</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>981-9</page-range></nlm-citation>
</ref>
<ref id="B31">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sampietro]]></surname>
<given-names><![CDATA[J. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Lopes]]></surname>
<given-names><![CDATA[E. S.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Compactação de um Cambissolo e Neossolo submetidos a diferentes intensidades de tráfego de Feller Buncher e Skidder]]></article-title>
<source><![CDATA[Scientia Forestalis]]></source>
<year>2011</year>
<volume>39</volume>
<numero>90</numero>
<issue>90</issue>
<page-range>265-72</page-range></nlm-citation>
</ref>
<ref id="B32">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sant&#8217;anna]]></surname>
<given-names><![CDATA[C. M.]]></given-names>
</name>
</person-group>
<source><![CDATA[Fatores humanos relacionados com a produtividade do operador de motosserra no corte florestal]]></source>
<year>1992</year>
<publisher-loc><![CDATA[Viçosa, Brasil ]]></publisher-loc>
<publisher-name><![CDATA[Universidade Federal de Viçosa]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B33">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Santos]]></surname>
<given-names><![CDATA[L. N.]]></given-names>
</name>
<name>
<surname><![CDATA[Fernades]]></surname>
<given-names><![CDATA[H. C.]]></given-names>
</name>
<name>
<surname><![CDATA[Silva]]></surname>
<given-names><![CDATA[M. L.]]></given-names>
</name>
<name>
<surname><![CDATA[Teixeira]]></surname>
<given-names><![CDATA[M. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Souza]]></surname>
<given-names><![CDATA[A. P.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Avaliação de custos da operação de extração da madeira com forwarder]]></article-title>
<source><![CDATA[Cerne]]></source>
<year>2016</year>
<volume>22</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>27-34</page-range></nlm-citation>
</ref>
<ref id="B34">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Santos]]></surname>
<given-names><![CDATA[S. L. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Machado]]></surname>
<given-names><![CDATA[C. C.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Análise técnico-econômica do processamento de madeira de eucalipto em áreas planas, utilizando o processador]]></article-title>
<source><![CDATA[Revista Árvore]]></source>
<year>1995</year>
<volume>19</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>346-57</page-range></nlm-citation>
</ref>
<ref id="B35">
<nlm-citation citation-type="">
<collab>SAS Institute Inc.</collab>
<source><![CDATA[SAS/STAT user's guide]]></source>
<year>1999</year>
</nlm-citation>
</ref>
<ref id="B36">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Schettino]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Minette]]></surname>
<given-names><![CDATA[L. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Souza]]></surname>
<given-names><![CDATA[A. P.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Correlação entre volumetria de florestas de eucalipto e produtividade e custos de máquinas de colheita de madeira]]></article-title>
<source><![CDATA[Revista Árvore]]></source>
<year>2015</year>
<volume>39</volume>
<numero>5</numero>
<issue>5</issue>
<page-range>935-42</page-range></nlm-citation>
</ref>
<ref id="B37">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Seixas]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
<name>
<surname><![CDATA[Castro]]></surname>
<given-names><![CDATA[G. P.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Extração]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Machado]]></surname>
<given-names><![CDATA[C.C.]]></given-names>
</name>
</person-group>
<source><![CDATA[Colheita Florestal]]></source>
<year>2014</year>
<page-range>106-61</page-range><publisher-loc><![CDATA[Viçosa ]]></publisher-loc>
<publisher-name><![CDATA[Editora UFV]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B38">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Shapiro]]></surname>
<given-names><![CDATA[S. S.]]></given-names>
</name>
<name>
<surname><![CDATA[Wilk]]></surname>
<given-names><![CDATA[M. B.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[An analysis of variance test for normality (complete samples)]]></article-title>
<source><![CDATA[Biometrika]]></source>
<year>1965</year>
<volume>52</volume>
<numero>3-4</numero>
<issue>3-4</issue>
<page-range>591-611</page-range></nlm-citation>
</ref>
<ref id="B39">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Szymczak]]></surname>
<given-names><![CDATA[D. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Brun]]></surname>
<given-names><![CDATA[E. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Reinert]]></surname>
<given-names><![CDATA[D. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Frigotto]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
<name>
<surname><![CDATA[Mazzalira]]></surname>
<given-names><![CDATA[C. C.]]></given-names>
</name>
<name>
<surname><![CDATA[Dal&#8217;Col Lúcio]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Marafiga]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Compactação do solo causada por tratores florestais na colheita de Pinus taeda L. na região sudoeste do Paraná]]></article-title>
<source><![CDATA[Revista Árvore]]></source>
<year>2014</year>
<volume>38</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>641-8</page-range></nlm-citation>
</ref>
<ref id="B40">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Trzesniowski]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Wozu Walderschliebung in Österreich]]></article-title>
<source><![CDATA[Österreichische Forstzeitung]]></source>
<year>1993</year>
<volume>104</volume>
<numero>7</numero>
<issue>7</issue>
<page-range>5-7</page-range></nlm-citation>
</ref>
<ref id="B41">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Tukey]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Comparing individual means in the analysis of variance]]></article-title>
<source><![CDATA[Biometrics]]></source>
<year>1949</year>
<volume>5</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>99-114</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
