<?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>2071-0054</journal-id>
<journal-title><![CDATA[Revista Ciencias Técnicas Agropecuarias]]></journal-title>
<abbrev-journal-title><![CDATA[Rev Cie Téc Agr]]></abbrev-journal-title>
<issn>2071-0054</issn>
<publisher>
<publisher-name><![CDATA[Universidad Agraria de La Habana]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2071-00542022000400009</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Affectations Caused to Mechanized Harvest by Weeds of Woody Consistency]]></article-title>
<article-title xml:lang="es"><![CDATA[Afectaciones causadas a la cosecha mecanizada por malezas de consistencia leñosa]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Martínez-Ramírez]]></surname>
<given-names><![CDATA[Rigoberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[González-Cueto]]></surname>
<given-names><![CDATA[Omar]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Zuaznábar-Zuaznábar]]></surname>
<given-names><![CDATA[Rafael]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto de Investigaciones de la Caña de Azúcar (INICA)  ]]></institution>
<addr-line><![CDATA[Boyeros La Habana]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Central &#8220;Marta Abreu&#8221; de las Villas Dpto. de Ingeniería Agrícola ]]></institution>
<addr-line><![CDATA[Santa Clara Villa Clara]]></addr-line>
<country>Cuba</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2022</year>
</pub-date>
<volume>31</volume>
<numero>4</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S2071-00542022000400009&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S2071-00542022000400009&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S2071-00542022000400009&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT Weeds cause severe damage to crops with large economic losses. In Cuba, in the latter, a group of woody weeds have invaded agro-ecosystems, mainly those linked to sugarcane activity, as a consequence of inadequate crop management. The present work was carried out with the objective of determining the effects caused to the mechanized harvest by the species A. procera, of woody consistency, in &#8220;Eulalio García&#8221; Sugarcane Production Farm, in Mayabeque Province in western Cuba. Blocks and fields were selected in which strips formed by 10 furrows were established, spaced at 1.6 m, which were consecutively numbered for random selection in the sample formation process, which was constituted with 30% of the fringes formed in each field. The time lost due to the obstruction of the weeds was evaluated by measuring the time elapsed from the moment the cutting activity was interrupted by the appearance of the obstacle until its restart once it had been overcome. Statistical processing included the calculation of central tendency and dispersion statistics and analysis of variance. Significant differences were found in the number of obstacles between fields and strips due to the heterogeneous distribution of plants in the area. The average time used to clear the obstacles was 26 seconds and the total time in the entire test was 0.29 hours.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN Las malezas causan severas afectaciones en los cultivos con cuantiosas pérdidas económicas. En Cuba en los últimos años varias especies de malezas de consistencia leñosas han invadido los agro-ecosistemas, principalmente los vinculados a la actividad cañera, como consecuencia del inadecuado manejo del cultivo. Es por ello que se realizó el presente trabajo con el objetivo de determinar las afectaciones causadas a la cosecha mecanizada por la especie A. procera, de consistencia leñosa, en la unidad productora de caña Eulalio García, en la provincia Mayabeque en el occidente de Cuba. Se seleccionaron bloques y campos en los que se establecieron franjas formadas por 10 surcos, espaciados a 1,6 m, las que fueron enumeradas consecutivamente para su selección al azar en el proceso de formación de la muestra, la que se constituyó con el 30% de las franjas constituidas en cada campo. Se evaluó el tiempo perdido por obstrucción de las malezas mediante la medición del tiempo transcurrido desde el momento de la interrupción de la actividad de corte por la aparición del obstáculo hasta su reinicio una vez superado este. El procesamiento estadístico contempló el cálculo de los estadígrafos de tendencia central y de dispersión y análisis de varianza. Se encontraron diferencias significativas en el número de obstáculos entre los campos y franjas debido a la heterogénea distribución de las plantas en el área. El tiempo promedio empleado en salvar un obstáculo fue de 26 segundos y el tiempo total en toda la prueba fue de 0,29 horas.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Lost Time]]></kwd>
<kwd lng="en"><![CDATA[Fuel Consumption]]></kwd>
<kwd lng="en"><![CDATA[KTP-2M Harvester]]></kwd>
<kwd lng="en"><![CDATA[Sugarcane]]></kwd>
<kwd lng="es"><![CDATA[Tiempo perdido]]></kwd>
<kwd lng="es"><![CDATA[consumo de combustible]]></kwd>
<kwd lng="es"><![CDATA[cosechadora KTP-2M]]></kwd>
<kwd lng="es"><![CDATA[caña de azúcar]]></kwd>
</kwd-group>
</article-meta>
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