<?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>2007-1124</journal-id>
<journal-title><![CDATA[Revista mexicana de ciencias pecuarias]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. de cienc. pecuarias]]></abbrev-journal-title>
<issn>2007-1124</issn>
<publisher>
<publisher-name><![CDATA[Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-11242019000400933</article-id>
<article-id pub-id-type="doi">10.22319/rmcp.v10i4.4927</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Óptimos técnicos para la producción de leche y carne en el sistema bovino de doble propósito del trópico mexicano]]></article-title>
<article-title xml:lang="en"><![CDATA[Technical optimum milk and meat production levels in dual-purpose cattle systems in tropical Mexico]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bautista Martínez]]></surname>
<given-names><![CDATA[Yuridia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Espinosa García]]></surname>
<given-names><![CDATA[José Antonio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Herrera Haro]]></surname>
<given-names><![CDATA[José Guadalupe]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Martínez Castañeda]]></surname>
<given-names><![CDATA[Francisco Ernesto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vaquera Huerta]]></surname>
<given-names><![CDATA[Humberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Estrada Drouaillet]]></surname>
<given-names><![CDATA[Benigno]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Granados Rivera]]></surname>
<given-names><![CDATA[Lorenzo Danilo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma de Tamaulipas Facultad de Medicina Veterinaria y Zootecnia ]]></institution>
<addr-line><![CDATA[ Tamaulipas]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Nacional de Investigaciones Forestales Agrícolas y Pecuarias Centro Nacional de Investigación Disciplinaria en Fisiología y Mejoramiento Animal ]]></institution>
<addr-line><![CDATA[ Querétaro]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Colegio de Postgraduados Campus Montecillo ]]></institution>
<addr-line><![CDATA[Texcoco Edo. México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Autónoma del Estado de México  ]]></institution>
<addr-line><![CDATA[Toluca Edo. México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias Campo Experimental General Terán ]]></institution>
<addr-line><![CDATA[ Nuevo León]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2019</year>
</pub-date>
<volume>10</volume>
<numero>4</numero>
<fpage>933</fpage>
<lpage>950</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-11242019000400933&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-11242019000400933&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-11242019000400933&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El objetivo de este estudio fue estimar y analizar los resultados obtenidos de una función de producción de leche y carne en unidades de producción del sistema de doble propósito (DP). Los datos se obtuvieron a través de encuestas mensuales, donde se registró información de producción de leche, carne, ingresos y egresos económicos, durante 12 meses. Las funciones se estimaron por el método indirecto de regresión lineal con datos transformados para una función Cobb-Douglas. La función para leche mostró que los insumos alimento y vacas explican el 91 % de la producción, con coeficientes de elasticidad de 0.34 y 0.5, productos marginales de 0.75 y 892.2 con valores de $4.03 y $4,800.2 respectivamente. Los insumos utilizados para la producción de leche se encuentran en la etapa II de producción con rendimientos marginales decrecientes, mientras que para la producción de carne los insumos alimento y vacas explican el 72 % de la producción, con coeficientes de elasticidades de producción de -0.20 y 1.11 respectivamente; el alimento se ubicó en la etapa III de producción con rendimientos marginales negativos, y el insumo vacas se encontró en la etapa I con rendimientos marginales crecientes. La suma de los coeficientes de ambas funciones que fueron 0.92 y 0.91 por ser menores a uno, tienen rendimientos decrecientes a escala. El nivel óptimo técnico de producción fue de 488.97 L diarios y 10 becerros al año. Los insumos para producción de leche se están utilizando de forma racional, pero se debe evaluar la cantidad de alimento utilizada para producción de carne, ya que refleja que es sobre utilizado.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Inputs directly affect profitability in livestock production, although what effects they have vary in response to production system and input type. An analysis was done of the results from a milk and meat production function using data from dual-purpose system (DP) production units in three locations in tropical Mexico. Data were collected through monthly surveys and covered milk production, meat production, income and financial costs over a twelve-month period. The functions were estimated by the indirect linear regression method with transformed data for a Cobb-Douglas function. The milk function showed the feed and cows inputs to explain 91 % of production. Elasticity coefficients were 0.34 for feed and 0.5 for cows. Marginal products were 0.75 for milk and 892.2 for cows, with values &#8203;&#8203;of $ 4.03 L for milk and $ 4,800.20 per cow. Both inputs are in stage II of production with diminishing marginal returns. For meat production both the feed and cows&#8217; inputs explained 72 % of production, with elasticities of production coefficients of -0.20 for feed and 1.11 for cows. Feed was in stage III of production with negative marginal returns, but the cows input was in stage I with increasing marginal returns. The sum of the coefficients was less than one for both functions (0.92 for feed, 0.91 for cows), indicating decreasing returns to scale. The optimum technical production levels were 488.97 L milk per day and 10 calves per year. In the studied producers the inputs for milk production were being used rationally, although in meat production feed appears to be overused and should be evaluated.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Cobb-Douglas]]></kwd>
<kwd lng="es"><![CDATA[Elasticidad]]></kwd>
<kwd lng="es"><![CDATA[Producto marginal]]></kwd>
<kwd lng="es"><![CDATA[Rendimientos a escala y Óptimo técnico]]></kwd>
<kwd lng="en"><![CDATA[Cobb-Douglas, Elasticity, Marginal product, Returns to scale]]></kwd>
<kwd lng="en"><![CDATA[technical optimum]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<label>1</label><nlm-citation citation-type="">
<collab>SIAP. Servicio de Información Agroalimentaria y Pesquera</collab>
<source><![CDATA[Resumen Nacional Pecuario]]></source>
<year>2018</year>
</nlm-citation>
</ref>
<ref id="B2">
<label>2</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rojo]]></surname>
<given-names><![CDATA[RR]]></given-names>
</name>
<name>
<surname><![CDATA[Vázquez]]></surname>
<given-names><![CDATA[AJF]]></given-names>
</name>
<name>
<surname><![CDATA[Pérez]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Mendoza]]></surname>
<given-names><![CDATA[MGD]]></given-names>
</name>
<name>
<surname><![CDATA[Salem]]></surname>
<given-names><![CDATA[AZM]]></given-names>
</name>
<name>
<surname><![CDATA[Albarrán]]></surname>
<given-names><![CDATA[PB]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Dual-purpose cattle production in Mexico]]></article-title>
<source><![CDATA[Trop Anim Health Prod]]></source>
<year>2009</year>
<volume>41</volume>
<numero>5</numero>
<issue>5</issue>
<page-range>715-21</page-range></nlm-citation>
</ref>
<ref id="B3">
<label>3</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Orantes]]></surname>
<given-names><![CDATA[ZMÁ]]></given-names>
</name>
<name>
<surname><![CDATA[Platas]]></surname>
<given-names><![CDATA[RD]]></given-names>
</name>
<name>
<surname><![CDATA[Córdova]]></surname>
<given-names><![CDATA[AV]]></given-names>
</name>
<name>
<surname><![CDATA[Santos]]></surname>
<given-names><![CDATA[LD]]></given-names>
</name>
<name>
<surname><![CDATA[Carmen]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Córdova]]></surname>
<given-names><![CDATA[AA.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Caracterización de la ganadería de doble propósito en una región de Chiapas, México]]></article-title>
<source><![CDATA[Ecosistemas y recursos agropecuarios]]></source>
<year>2014</year>
<volume>1</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>49-58</page-range></nlm-citation>
</ref>
<ref id="B4">
<label>4</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Albarrán]]></surname>
<given-names><![CDATA[PB]]></given-names>
</name>
<name>
<surname><![CDATA[Rebollar]]></surname>
<given-names><![CDATA[RS]]></given-names>
</name>
<name>
<surname><![CDATA[García]]></surname>
<given-names><![CDATA[MA]]></given-names>
</name>
<name>
<surname><![CDATA[Rojo]]></surname>
<given-names><![CDATA[RR]]></given-names>
</name>
<name>
<surname><![CDATA[Avilés]]></surname>
<given-names><![CDATA[NF]]></given-names>
</name>
<name>
<surname><![CDATA[Arriaga]]></surname>
<given-names><![CDATA[JCM.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Socioeconomic and productive characterization of dual-purpose farms oriented to milk production in a subtropical region of Mexico]]></article-title>
<source><![CDATA[Trop Anim Health Prod]]></source>
<year>2015</year>
<volume>47</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>519-23</page-range></nlm-citation>
</ref>
<ref id="B5">
<label>5</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Vishnoi S]]></surname>
<given-names><![CDATA[Pramendra]]></given-names>
</name>
<name>
<surname><![CDATA[Gupta V]]></surname>
<given-names><![CDATA[Pooniya R.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Milk production function and resource use efficiency in Jaipur District of Rajasthan]]></article-title>
<source><![CDATA[Afr J Agric Res]]></source>
<year>2015</year>
<numero>10-32</numero>
<issue>10-32</issue>
<page-range>3200-5</page-range></nlm-citation>
</ref>
<ref id="B6">
<label>6</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bravo]]></surname>
<given-names><![CDATA[UBE]]></given-names>
</name>
<name>
<surname><![CDATA[Rieger]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Alternative production frontier methodologies and dairy farm efficiency]]></article-title>
<source><![CDATA[JAE]]></source>
<year>1990</year>
<volume>41</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>215-26</page-range></nlm-citation>
</ref>
<ref id="B7">
<label>7</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Cuevas]]></surname>
<given-names><![CDATA[RV]]></given-names>
</name>
<name>
<surname><![CDATA[Loiza]]></surname>
<given-names><![CDATA[MA]]></given-names>
</name>
<name>
<surname><![CDATA[Astego]]></surname>
<given-names><![CDATA[CH]]></given-names>
</name>
<name>
<surname><![CDATA[Moreno]]></surname>
<given-names><![CDATA[GT]]></given-names>
</name>
<name>
<surname><![CDATA[Borja]]></surname>
<given-names><![CDATA[BM]]></given-names>
</name>
<name>
<surname><![CDATA[Reyes]]></surname>
<given-names><![CDATA[JJE]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Análisis de la función de producción de leche en el sistema bovinos doble propósito en Ahome, Sinaloa]]></article-title>
<source><![CDATA[Rev Mex Cienc Pecu]]></source>
<year>2018</year>
<volume>9</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>376-86</page-range></nlm-citation>
</ref>
<ref id="B8">
<label>8</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Morales]]></surname>
<given-names><![CDATA[HJL]]></given-names>
</name>
<name>
<surname><![CDATA[Gonzales]]></surname>
<given-names><![CDATA[RFDJ]]></given-names>
</name>
<name>
<surname><![CDATA[Hernández]]></surname>
<given-names><![CDATA[MJ.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Función de producción de la ganadería de carne en la zona sur del Estado de México]]></article-title>
<source><![CDATA[Rev Mex Cienc Pecu]]></source>
<year>2018</year>
</nlm-citation>
</ref>
<ref id="B9">
<label>9</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Pech]]></surname>
<given-names><![CDATA[MV]]></given-names>
</name>
<name>
<surname><![CDATA[Santos]]></surname>
<given-names><![CDATA[FJ]]></given-names>
</name>
<name>
<surname><![CDATA[Montes]]></surname>
<given-names><![CDATA[PR.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Función de producción de la ganadería de doble propósito de la zona oriente del estado de Yucatán, México]]></article-title>
<source><![CDATA[Téc Pecu Méx]]></source>
<year>2002</year>
<volume>40</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>187-92</page-range></nlm-citation>
</ref>
<ref id="B10">
<label>10</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Debertin]]></surname>
<given-names><![CDATA[DL.]]></given-names>
</name>
</person-group>
<source><![CDATA[Agricultural production economics]]></source>
<year>1982</year>
<edition>2nd</edition>
<publisher-loc><![CDATA[New York, USA ]]></publisher-loc>
<publisher-name><![CDATA[MacMillan]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B11">
<label>11</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Vargas]]></surname>
<given-names><![CDATA[BBE.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[La Función de producción Cobb - Douglas]]></article-title>
<source><![CDATA[Revista de Difusión Cultural y Científica de la Universidad La Salle en Bolivia]]></source>
<year>2014</year>
<volume>8</volume>
<numero>8</numero>
<issue>8</issue>
<page-range>67-74</page-range></nlm-citation>
</ref>
<ref id="B12">
<label>12</label><nlm-citation citation-type="">
<collab>CNA. Comisión nacional del agua</collab>
<source><![CDATA[Normales climatológicas]]></source>
<year>2017</year>
<publisher-loc><![CDATA[México ]]></publisher-loc>
</nlm-citation>
</ref>
<ref id="B13">
<label>13</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Griliches]]></surname>
<given-names><![CDATA[Z.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Estimates of the Aggregate Agricultural Production Function from cross-sectional data]]></article-title>
<source><![CDATA[J Farm Econom]]></source>
<year>1963</year>
<volume>45</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>419-28</page-range></nlm-citation>
</ref>
<ref id="B14">
<label>14</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ghebremariam]]></surname>
<given-names><![CDATA[WK]]></given-names>
</name>
<name>
<surname><![CDATA[Ortmann]]></surname>
<given-names><![CDATA[GF]]></given-names>
</name>
<name>
<surname><![CDATA[Nsahlai]]></surname>
<given-names><![CDATA[IV.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A production function analysis of commercial dairy farms in the Highlands of Eritrea using ridge regression]]></article-title>
<source><![CDATA[JAE]]></source>
<year>2006</year>
<volume>45</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>225-41</page-range></nlm-citation>
</ref>
<ref id="B15">
<label>15</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Monke]]></surname>
<given-names><![CDATA[EA]]></given-names>
</name>
<name>
<surname><![CDATA[Pearson]]></surname>
<given-names><![CDATA[SR.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The policy analysis matrix for agricultural development]]></article-title>
<source><![CDATA[Policy Anal]]></source>
<year>1989</year>
</nlm-citation>
</ref>
<ref id="B16">
<label>16</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Quiroz]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Granados]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Barrón]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Espejel]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Espinosa]]></surname>
<given-names><![CDATA[JA.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Estructura de los hatos bovinos en Tabasco]]></article-title>
<source><![CDATA[AICA]]></source>
<year>2014</year>
<numero>4</numero>
<issue>4</issue>
<page-range>252-3</page-range></nlm-citation>
</ref>
<ref id="B17">
<label>17</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Mahajan]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<source><![CDATA[Economic analysis of rural and pere urban farm in Ludhiana District of Punjab]]></source>
<year>2008</year>
<publisher-name><![CDATA[Deemed University]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B18">
<label>18</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sinhg]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<source><![CDATA[Economic analysis of milk production in Varanasi District of Utta Pradesh]]></source>
<year>2008</year>
<publisher-loc><![CDATA[India ]]></publisher-loc>
<publisher-name><![CDATA[Deemed University]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B19">
<label>19</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ashish]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Bhadauria]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Production function analysis on member dairy cooperative society for milch cow in Distric Etawah (U.P)]]></article-title>
<source><![CDATA[IJEAB]]></source>
<year>2017</year>
<volume>2</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>23-9</page-range></nlm-citation>
</ref>
<ref id="B20">
<label>20</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Mackle]]></surname>
<given-names><![CDATA[TR]]></given-names>
</name>
<name>
<surname><![CDATA[Parr]]></surname>
<given-names><![CDATA[CR]]></given-names>
</name>
<name>
<surname><![CDATA[Stakelum]]></surname>
<given-names><![CDATA[GK]]></given-names>
</name>
<name>
<surname><![CDATA[Bryant]]></surname>
<given-names><![CDATA[AM]]></given-names>
</name>
<name>
<surname><![CDATA[MacMillan]]></surname>
<given-names><![CDATA[KL.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Feed conversion efficiency, daily pasture intake, and milk production of primiparous Friesian and Jersey cows calved at two different liveweights]]></article-title>
<source><![CDATA[N Z J Agric Res]]></source>
<year>1996</year>
<volume>39</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>357-70</page-range></nlm-citation>
</ref>
<ref id="B21">
<label>21</label><nlm-citation citation-type="confpro">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Cursack]]></surname>
<given-names><![CDATA[AM]]></given-names>
</name>
<name>
<surname><![CDATA[Castignani]]></surname>
<given-names><![CDATA[MI]]></given-names>
</name>
<name>
<surname><![CDATA[Osan]]></surname>
<given-names><![CDATA[O]]></given-names>
</name>
<name>
<surname><![CDATA[Castignani]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
</person-group>
<source><![CDATA[Función de producción en sistemas lecheros de alta producción de la Cuenca Central Santafesina, Argentina]]></source>
<year>2010</year>
<conf-name><![CDATA[ 11ºCongreso Panamericano de la Leche]]></conf-name>
<conf-loc>Brasil </conf-loc>
</nlm-citation>
</ref>
<ref id="B22">
<label>22</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rebollar]]></surname>
<given-names><![CDATA[RS.]]></given-names>
</name>
</person-group>
<source><![CDATA[La función Cobb-Douglas de la producción semi -intensiva de leche en el sur del Estado de México. Análisis económico]]></source>
<year>2018</year>
<volume>XXXIII</volume>
<numero>82</numero>
<issue>82</issue>
<publisher-name><![CDATA[UNAM]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B23">
<label>23</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Pérez]]></surname>
<given-names><![CDATA[HP]]></given-names>
</name>
<name>
<surname><![CDATA[Becerril]]></surname>
<given-names><![CDATA[PCM]]></given-names>
</name>
<name>
<surname><![CDATA[Lamothe]]></surname>
<given-names><![CDATA[ZC]]></given-names>
</name>
<name>
<surname><![CDATA[Torres]]></surname>
<given-names><![CDATA[HG]]></given-names>
</name>
<name>
<surname><![CDATA[López]]></surname>
<given-names><![CDATA[OS]]></given-names>
</name>
<name>
<surname><![CDATA[Gallegos]]></surname>
<given-names><![CDATA[SJ.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Efecto del amamantamiento retrasado en la actividad posparto de las vacas y en los becerros de doble propósito]]></article-title>
<source><![CDATA[Interciencia]]></source>
<year>2006</year>
<volume>31</volume>
<page-range>748-52</page-range></nlm-citation>
</ref>
<ref id="B24">
<label>24</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Pérez]]></surname>
<given-names><![CDATA[HP]]></given-names>
</name>
<name>
<surname><![CDATA[Solarís]]></surname>
<given-names><![CDATA[MF]]></given-names>
</name>
<name>
<surname><![CDATA[García]]></surname>
<given-names><![CDATA[WM]]></given-names>
</name>
<name>
<surname><![CDATA[Osorio]]></surname>
<given-names><![CDATA[AM]]></given-names>
</name>
<name>
<surname><![CDATA[Gallegos]]></surname>
<given-names><![CDATA[SJ]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Comportamiento productivo y reproductivo de vacas de doble propósito en dos sistemas de amamantamiento en trópico]]></article-title>
<source><![CDATA[Arch Latinoam Prod Anim]]></source>
<year>2001</year>
<volume>9</volume>
<page-range>79-85</page-range></nlm-citation>
</ref>
<ref id="B25">
<label>25</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Camacho]]></surname>
<given-names><![CDATA[VJH]]></given-names>
</name>
<name>
<surname><![CDATA[Cervantes]]></surname>
<given-names><![CDATA[EF]]></given-names>
</name>
<name>
<surname><![CDATA[Palacios]]></surname>
<given-names><![CDATA[RMI]]></given-names>
</name>
<name>
<surname><![CDATA[Rosales]]></surname>
<given-names><![CDATA[NF]]></given-names>
</name>
<name>
<surname><![CDATA[Vargas]]></surname>
<given-names><![CDATA[CJM.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Factores determinantes del rendimiento en unidades de producción de lechería familiar]]></article-title>
<source><![CDATA[Rev Mex Cienc Pecu]]></source>
<year>2017</year>
<volume>8</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>23-9</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
