<?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>S1405-31952018000600841</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Producción de diez variedades de alfalfa (Medicago sativa L.) a cuatro años de establecidas]]></article-title>
<article-title xml:lang="en"><![CDATA[Production of ten varieties of alfalfa (Medicago sativa L.) after four years of being established]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Álvarez-Vázquez]]></surname>
<given-names><![CDATA[Perpetuo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hernández-Garay]]></surname>
<given-names><![CDATA[Alfonso]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mendoza-Pedroza]]></surname>
<given-names><![CDATA[Sergio Iban]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rojas-García]]></surname>
<given-names><![CDATA[Adelaido Rafael]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Wilson-García]]></surname>
<given-names><![CDATA[Claudia Yanet]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Alejos-de la Fuente]]></surname>
<given-names><![CDATA[José Isidro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Colegio de Postgraduados Campus Montecillo Ganadería]]></institution>
<addr-line><![CDATA[Montecillo Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Autónoma Chapingo  ]]></institution>
<addr-line><![CDATA[ Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Autónoma de Guerrero Facultad de Medicina Veterinaria y Zootecnia ]]></institution>
<addr-line><![CDATA[ Guerrero]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Autónoma Chapingo  ]]></institution>
<addr-line><![CDATA[ Guerrero]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2018</year>
</pub-date>
<volume>52</volume>
<numero>6</numero>
<fpage>841</fpage>
<lpage>851</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1405-31952018000600841&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1405-31952018000600841&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1405-31952018000600841&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen La alfalfa (Medicago sativa L.) es la especie forrajera más usada para alimentar al ganado bovino lechero en México. El objetivo de este estudio fue evaluar la producción de diez variedades de alfalfa, cosechadas en intervalos de corte definidos estacionalmente. La hipótesis fue que al menos una de las variedades tiene comportamiento productivo aceptable. Las variedades se distribuyeron en 40 parcelas de 9 x 7 m, en un diseño completamente al azar, con cuatro repeticiones. El estudio se realizó en el CP-Campus Montecillo, México, de septiembre de 2011 a septiembre de 2012. Las variables evaluadas fueron rendimiento de forraje (RF), composición botánica y morfológica (CBM), relación hoja:tallo (R:H/T), densidad poblacional de tallos (DT) y densidad de plantas (DP). La variedad Júpiter mostró RF 14 510 kg MS ha-1, R:H/T 1.8, DT 578 tallos m-2 y DP 18 plantas m-2 mayores y San Miguelito valores menores en RF (7,890 kg MS ha-1), DT (282 tallos m-2) y DP (8 plantas m-2). RF promedio fue (3,508 kg MS ha-1) mayor en verano y en otoño, y menor en invierno (2,214 kg MS ha-1 promedio). En otoño e invierno presentaron R:H/T, DT y DP mayores (1.5, 546 tallos m-2 y 20 plantas m-2 en promedio). En contraste, en primavera-verano R:H/T, DT y DP fueron menores (1.0, 371 tallos m-2 y 12 plantas m-2 en promedio). RF anual fue 56 %. Las malezas tuvieron la aportación mayor (43 %) y el material muerto (9 %) la menor. Júpiter fue la más productiva y el verano contribuyó más al RF anual. La edad de la pradera ocasionó una invasión mayor de malezas y una presencia menor de alfalfa.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Alfalfa (Medicago sativa L.) is the forage species most commonly used to feed dairy cattle in Mexico. The objective of this study was to evaluate the production of ten varieties of alfalfa, harvested at cutting intervals defined seasonally. The varieties were distributed in 40 plots (9 x 7 m), and the experimental design was completely randomized with four repetitions. The study was performed at the Colegio de Postgraduados, Campus Montecillo, Texcoco, Mexico, from September 2011 to September 2012. The variables evaluated were forage yield (FY), botanical and morphological composition (BMC), leaf:stem ratio (R:L/S), population density of stems (SD) and plant density (PD). The Júpiter variety showed the higher values for FY (14 510 kg DM ha-1), R:L/S (1.8), SD (578 stems m-2) and PD (18 plants m-2), and San Miguelito the lower values for FY (7,890 kg DM ha-1), SD (282 stems m-2) and PD (8 plants m-2). The average FY was (3,508 kg DM ha-1) higher in summer and fall, and lower in winter (2,214 kg DM ha-1 average). In fall and winter they presented higher R:L/S, SD and PD (1.5, 546 stems m-2 and 20 plants m-2 in average). In contrast, in spring-summer, R:L/S, SD and PD were lower (1.0, 371 stems m-2 and 12 plants m-2 in average). The annual FY was 56 %. The undergrowth had the highest contribution (43 %) and the dead material (9 %), the lowest. Júpiter was the most productive variety and summer contributed most to the annual FY. The age of the grassland caused a higher invasion of undergrowth and a lower presence of alfalfa.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[rendimiento de forraje]]></kwd>
<kwd lng="es"><![CDATA[composición botánica y morfológica]]></kwd>
<kwd lng="es"><![CDATA[densidad de tallos]]></kwd>
<kwd lng="es"><![CDATA[densidad de plantas]]></kwd>
<kwd lng="en"><![CDATA[forage yield]]></kwd>
<kwd lng="en"><![CDATA[botanical and morphological composition]]></kwd>
<kwd lng="en"><![CDATA[stem density]]></kwd>
<kwd lng="en"><![CDATA[plant density]]></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[Alarcón]]></surname>
<given-names><![CDATA[Z, B.]]></given-names>
</name>
<name>
<surname><![CDATA[Ortega N.]]></surname>
<given-names><![CDATA[G. C.]]></given-names>
</name>
<name>
<surname><![CDATA[Gonzales M.]]></surname>
<given-names><![CDATA[S. S.]]></given-names>
</name>
<name>
<surname><![CDATA[Cervantes M., R.]]></surname>
<given-names><![CDATA[T]]></given-names>
</name>
<name>
<surname><![CDATA[O]]></surname>
<given-names><![CDATA[Venegas]]></given-names>
</name>
</person-group>
<source><![CDATA[Manual de la selección genética y molecular, producción de semilla de alfalfa en el Valle del Mezquital, Hidalgo.]]></source>
<year>2011</year>
<publisher-loc><![CDATA[México ]]></publisher-loc>
<publisher-name><![CDATA[Fundación Hidalgo Produce A.C]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B2">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Améndola]]></surname>
<given-names><![CDATA[M. R. D.]]></given-names>
</name>
<name>
<surname><![CDATA[Castillo E.]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Martínez H]]></surname>
<given-names><![CDATA[P. A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Perfiles por país del recurso pastura/forraje]]></article-title>
<source><![CDATA[Organización de las Naciones Unidas para la Alimentación y la Agricultura]]></source>
<year>2005</year>
</nlm-citation>
</ref>
<ref id="B3">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Cinar]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Hatipoglu]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Forage yield and botanical composition of mixtures of some perennial warm season grasses with alfalfa (Medicago sativa L.) under mediterranean conditions]]></article-title>
<source><![CDATA[Turk. J. Field Crops]]></source>
<year>2014</year>
<volume>19</volume>
<page-range>13-8</page-range></nlm-citation>
</ref>
<ref id="B4">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[García]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
</person-group>
<source><![CDATA[Modificaciones al Sistema de Clasificación Climática de Koppen]]></source>
<year>2004</year>
<edition>4</edition>
<publisher-loc><![CDATA[México, D. F. ]]></publisher-loc>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B5">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Halim]]></surname>
<given-names><![CDATA[R. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Buxton R]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Hattendorf J.]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Carlson E.]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Water-stress effects on alfalfa quality after adjustments for maturity differences]]></article-title>
<source><![CDATA[Agron. J.]]></source>
<year>1989</year>
<volume>81</volume>
<page-range>18-94</page-range></nlm-citation>
</ref>
<ref id="B6">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Hernández-Garay]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Matthew]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Tiller size-density compensation in ryegrass miniature swards subject to differing defoliation heights and a proposed productivity index]]></article-title>
<source><![CDATA[Grass Forage Sci.]]></source>
<year>1999</year>
<volume>154</volume>
<page-range>347-56</page-range></nlm-citation>
</ref>
<ref id="B7">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Lamb]]></surname>
<given-names><![CDATA[J. F. S.]]></given-names>
</name>
<name>
<surname><![CDATA[Hans-Joachim J.]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Heathcliffe]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Growth environment, harvest management and germplasm impacts on potential ethanol and crude protein yield in alfalfa]]></article-title>
<source><![CDATA[Biomass Bioenergy]]></source>
<year>2014</year>
<volume>63</volume>
<page-range>114-25</page-range></nlm-citation>
</ref>
<ref id="B8">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Mendoza]]></surname>
<given-names><![CDATA[P. S. I.]]></given-names>
</name>
<name>
<surname><![CDATA[Hernández G.]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Pérez P.]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Quero C.]]></surname>
<given-names><![CDATA[A. R.]]></given-names>
</name>
<name>
<surname><![CDATA[Escalante]]></surname>
<given-names><![CDATA[J. A. S.]]></given-names>
</name>
<name>
<surname><![CDATA[Zaragoza R.]]></surname>
<given-names><![CDATA[E.J. L.]]></given-names>
</name>
<name>
<surname><![CDATA[Ramírez R.]]></surname>
<given-names><![CDATA[O.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Respuesta productiva de la alfalfa a diferentes frecuencias de corte]]></article-title>
<source><![CDATA[Rev. Mex. Ciencias Pec.]]></source>
<year>2010</year>
<volume>1</volume>
<page-range>287-96</page-range></nlm-citation>
</ref>
<ref id="B9">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Milic]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Karagic]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Vasiljevic]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Mikic]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Milo&#353;evic]]></surname>
<given-names><![CDATA[B]]></given-names>
</name>
<name>
<surname><![CDATA[Katic]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Breeding and improvement of quality traits in alfalfa (Medicago sativa L.)]]></article-title>
<source><![CDATA[Genetika]]></source>
<year>2014</year>
<volume>46</volume>
<page-range>11-8</page-range></nlm-citation>
</ref>
<ref id="B10">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Morales]]></surname>
<given-names><![CDATA[A. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Jiménez L.]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Velasco V.]]></surname>
<given-names><![CDATA[V. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Villegas A.]]></surname>
<given-names><![CDATA[Y]]></given-names>
</name>
<name>
<surname><![CDATA[Enríquez del V.]]></surname>
<given-names><![CDATA[J. R.]]></given-names>
</name>
<name>
<surname><![CDATA[Hernández G.]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Evaluación de 14 variedades de alfalfa con fertirriego en la mixteca de Oaxaca]]></article-title>
<source><![CDATA[Téc. Pecu. Méx.]]></source>
<year>2006</year>
<volume>44</volume>
<page-range>277-88</page-range></nlm-citation>
</ref>
<ref id="B11">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ortíz]]></surname>
<given-names><![CDATA[S., C.]]></given-names>
</name>
</person-group>
<source><![CDATA[Colección de Monolitos. Departamento de génesis de suelos. Edafología]]></source>
<year>1997</year>
<publisher-loc><![CDATA[Montecillo, Texcoco, Estado de México ]]></publisher-loc>
<publisher-name><![CDATA[IRENAT]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B12">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rivas]]></surname>
<given-names><![CDATA[J. M. A.]]></given-names>
</name>
<name>
<surname><![CDATA[López C.]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Hernández G.]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Pérez J]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Efecto de tres regímenes de cosecha en el comportamiento productivo de cinco variedades comerciales de alfalfa (Medicago sativa L.)]]></article-title>
<source><![CDATA[Téc. Pecu. Méx.]]></source>
<year>2005</year>
<volume>43</volume>
<page-range>79-92</page-range></nlm-citation>
</ref>
<ref id="B13">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rojas]]></surname>
<given-names><![CDATA[G. A. R.]]></given-names>
</name>
<name>
<surname><![CDATA[Hernández G.]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Joaquín, C.]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Mendoza]]></surname>
<given-names><![CDATA[S. I.]]></given-names>
</name>
<name>
<surname><![CDATA[Guerrero R.]]></surname>
<given-names><![CDATA[P., J. D.]]></given-names>
</name>
<name>
<surname><![CDATA[Zaragoza R.]]></surname>
<given-names><![CDATA[J. L.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Comportamiento productivo y rendimiento de forraje de cinco variedades de alfalfa]]></article-title>
<source><![CDATA[2da Reunión Internacional conjunta de manejo de pastizales y producción animal]]></source>
<year>2012</year>
<page-range>336-40</page-range><publisher-loc><![CDATA[Zacatecas, México ]]></publisher-loc>
</nlm-citation>
</ref>
<ref id="B14">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rojas]]></surname>
<given-names><![CDATA[G. A. R.]]></given-names>
</name>
<name>
<surname><![CDATA[Hernández G]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Joaquín C]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[de los A. Maldonado P.]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Mendoza P.]]></surname>
<given-names><![CDATA[S. I.]]></given-names>
</name>
<name>
<surname><![CDATA[Álvarez V]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Joaquin T.]]></surname>
<given-names><![CDATA[B. M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Comportamiento productivo de cinco variedades de alfalfa]]></article-title>
<source><![CDATA[Rev. Mex. Cienc. Agríc.]]></source>
<year>2016</year>
<volume>7</volume>
<page-range>1855-66</page-range></nlm-citation>
</ref>
<ref id="B15">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rojas-García]]></surname>
<given-names><![CDATA[A. R.]]></given-names>
</name>
<name>
<surname><![CDATA[Torres-Salado]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
<name>
<surname><![CDATA[Joaquín-Cancino]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Hernández-Garay]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[de los Á. Maldonado-Peralta]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Sánchez-Santillán]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Componentes del rendimiento en variedades de alfalfa (Medicago sativa L.)]]></article-title>
<source><![CDATA[Agrociencia]]></source>
<year>2017</year>
<volume>51</volume>
<page-range>697-708</page-range></nlm-citation>
</ref>
<ref id="B16">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Salinas]]></surname>
<given-names><![CDATA[C. S.]]></given-names>
</name>
</person-group>
<source><![CDATA[Pasado, presente y futuro de la alfalfa (Medicago sativa L.) en México.]]></source>
<year>2005</year>
<publisher-name><![CDATA[Semillas Berentsen. Departamento de Investigación y Desarrollo.]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B17">
<nlm-citation citation-type="book">
<collab>SAS, Institute</collab>
<source><![CDATA[SAS/STAT® 9.2. User´s Guide Release.]]></source>
<year>2009</year>
<publisher-loc><![CDATA[USA ]]></publisher-loc>
<publisher-name><![CDATA[Cary, NC: SAS Institute Inc.]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B18">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sevilla]]></surname>
<given-names><![CDATA[G. H.]]></given-names>
</name>
<name>
<surname><![CDATA[Pasinato, A.]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[García J.]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Producción de forraje y densidad de plantas de alfalfa irrigada comparando diferentes densidades de siembra]]></article-title>
<source><![CDATA[Arch. Latinoam. Prod. Animal]]></source>
<year>2002</year>
<volume>10</volume>
<page-range>164-70</page-range></nlm-citation>
</ref>
<ref id="B19">
<nlm-citation citation-type="">
<collab>SIAP</collab>
<source><![CDATA[Servicio de Información Agroalimentaria y Pesquera]]></source>
<year>2014</year>
</nlm-citation>
</ref>
<ref id="B20">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Teixeira]]></surname>
<given-names><![CDATA[E. I.]]></given-names>
</name>
<name>
<surname><![CDATA[Derrick J.]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Hamish B.]]></surname>
<given-names><![CDATA[B]]></given-names>
</name>
<name>
<surname><![CDATA[Fletcher L.]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The dynamics of lucerne (Medicago sativa L.) yield components in response to defoliation frequency]]></article-title>
<source><![CDATA[Eur. J. Agron.]]></source>
<year>2007</year>
<volume>26</volume>
<page-range>394-400</page-range></nlm-citation>
</ref>
<ref id="B21">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Török]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[András]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[Valkó]]></surname>
<given-names><![CDATA[O]]></given-names>
</name>
<name>
<surname><![CDATA[Deák]]></surname>
<given-names><![CDATA[B]]></given-names>
</name>
<name>
<surname><![CDATA[Lukács]]></surname>
<given-names><![CDATA[B]]></given-names>
</name>
<name>
<surname><![CDATA[Tóthmérész]]></surname>
<given-names><![CDATA[B]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Lucerne-dominated fields recover native grass diversity without intensive management actions.]]></article-title>
<source><![CDATA[J. Appl. Ecol.]]></source>
<year>2010</year>
<volume>48</volume>
<page-range>257-64</page-range></nlm-citation>
</ref>
<ref id="B22">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ventroni]]></surname>
<given-names><![CDATA[L. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Volenec J.]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Cangiano A.]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Fall dormancy and cutting frequency impact on alfalfa yield and yield components]]></article-title>
<source><![CDATA[Field Crop. Res.]]></source>
<year>2010</year>
<volume>119</volume>
<page-range>252-9</page-range></nlm-citation>
</ref>
<ref id="B23">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Villegas]]></surname>
<given-names><![CDATA[A. Y.]]></given-names>
</name>
<name>
<surname><![CDATA[Hernández G.]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Pérez P.]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[López C]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Herrera H.]]></surname>
<given-names><![CDATA[J. G.]]></given-names>
</name>
<name>
<surname><![CDATA[Enriquez Q.]]></surname>
<given-names><![CDATA[J. F.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Patrones estacionales de crecimiento de dos variedades de alfalfa (Medicago sativa L.)]]></article-title>
<source><![CDATA[Téc. Pecu. Méx.]]></source>
<year>2004</year>
<volume>42</volume>
<page-range>145-58</page-range></nlm-citation>
</ref>
<ref id="B24">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Villegas]]></surname>
<given-names><![CDATA[A. Y.]]></given-names>
</name>
<name>
<surname><![CDATA[Hernández G.]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Martínez H.]]></surname>
<given-names><![CDATA[P. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Pérez P]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Herrera H]]></surname>
<given-names><![CDATA[J. G.]]></given-names>
</name>
<name>
<surname><![CDATA[López C.]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Rendimiento de forraje de variedades de alfalfa en dos calendarios de corte.]]></article-title>
<source><![CDATA[Rev. Fitotec. Mex.]]></source>
<year>2006</year>
<volume>29</volume>
<page-range>369-72</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
