<?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>1405-3195</journal-id>
<journal-title><![CDATA[Agrociencia]]></journal-title>
<abbrev-journal-title><![CDATA[Agrociencia]]></abbrev-journal-title>
<issn>1405-3195</issn>
<publisher>
<publisher-name><![CDATA[Colegio de Postgraduados]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1405-31952016000600701</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Cambios en la ganadería doble propósito en el trópico seco del Estado de México]]></article-title>
<article-title xml:lang="en"><![CDATA[Changes in dual purpose livestock farming system in the dry tropic of Estado de Mexico]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Nájera-Garduño]]></surname>
<given-names><![CDATA[Adriana de L.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Piedra-Matias]]></surname>
<given-names><![CDATA[Rocio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Albarrán-Portillo]]></surname>
<given-names><![CDATA[Benito]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García-Martínez]]></surname>
<given-names><![CDATA[Anastacio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma del Estado de México Centro Universitario UAEM Temascaltepec ]]></institution>
<addr-line><![CDATA[Temascaltepec Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2016</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2016</year>
</pub-date>
<volume>50</volume>
<numero>6</numero>
<fpage>701</fpage>
<lpage>710</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1405-31952016000600701&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1405-31952016000600701&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1405-31952016000600701&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen La ganadería es una actividad económica importante en zonas rurales, aunque en años recientes ha presentado cambios importantes, debido a ajustes socioeconómicos. Uno de estos cambios es criar ganado para cumplir dos metas de producción en lugar de una. El objetivo de este estudio fue analizar los cambios en unidades de producción (UP) con ganado doble propósito (DP) en el sur del Estado de México. Mediante seguimientos técnico-económicos, en 2006 se obtuvo información de 50 ganaderos elegidos con muestreo aleatorio. Las variables evaluadas fueron 14 de estructura y manejo (abandono de la actividad ganadera, disponibilidad de mano de obra, alimentación, superficie y tamaño de hato) y 14 económicas obtenidas con encuestas estructuradas. Todos los ganaderos aportaron información confiable para validar los datos que fueron contrastados con los registros en la UP y con informantes clave y estadísticas oficiales para las variables económicas. Las mismas variables se evaluaron en la misma muestra en 2013. El método estadístico usado fue una prueba t de Student para la comparación de valores promedio de las 28 variables entre las fechas. Durante el periodo de siete años 56 % de los ganaderos abandonaron la actividad y la mano de obra disminuyó 42 % (p&#8804;0.05). La superficie y el tamaño del hato se mantuvo (p&gt;0.05). Los cambios en la alimentación y en el ingreso total por vaca y superficie (ha) fueron significativos (p&#8804;0.05). Las UP DP cambiaron su estructura, el uso de la tierra, la alimentación, el manejo y la gestión de las UP y, por tanto, la organización y orientación de la producción del ganado. La tendencia indica que los cambios en la ganadería del sur del Estado de México continuarán.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Livestock farming is an important economic activity in rural areas, although it has presented changes due to socioeconomic adjustments. One of these changes is to raise livestock to achieve two production goals, rather than one. The aim of this study was to analyze the changes in production units (PU) with dual-purpose (DP) livestock in Southern Estado de Mexico. In 2006, with technical and economic follow-ups, information was obtained from 50 livestock farmers chosen by random sampling. Fourteen structure and management variables were evaluated (abandonment of livestock activity, labour availability, feeding, surface and size of herd), along with 14 economic variables, all of which were obtained with structured surveys. All the livestock farmers provided reliable information for the validation of the data, which were also contrasted with the records in the PU and with key informers and official statistics for the economic variables. Such variables were evaluated in the same sample in 2013. The statistical method used was a Student t test, for the comparison of average values of the 28 variables between dates. During the seven-year period, 56 % of the livestock farmers abandoned the activity and labour fell by 42 % (p&#8804;0.05). The surface and size of the herd remained equal (p&gt;0.05). The changes in the feeding and total income per cow and surface (ha) were significant (p&#8804;0.05). The PU DP changed their structure, land use, feeding, management of the PU&#8217;s and therefore, the organization and orientation of livestock production. Tendencies indicate that the changes in livestock farming in southern Estado de México will continue.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Bovinos]]></kwd>
<kwd lng="es"><![CDATA[unidades de producción]]></kwd>
<kwd lng="es"><![CDATA[cambios]]></kwd>
<kwd lng="es"><![CDATA[trópico seco]]></kwd>
<kwd lng="es"><![CDATA[doble propósito]]></kwd>
<kwd lng="en"><![CDATA[Bovines]]></kwd>
<kwd lng="en"><![CDATA[production units]]></kwd>
<kwd lng="en"><![CDATA[changes]]></kwd>
<kwd lng="en"><![CDATA[dry tropic]]></kwd>
<kwd lng="en"><![CDATA[dual-purpose]]></kwd>
</kwd-group>
</article-meta>
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