<?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>S1405-31952017000300315</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Influencia de las especies leñosas en la dinámica de arvenses en sistemas agroforestales en Yucatán, México]]></article-title>
<article-title xml:lang="en"><![CDATA[Influence of woody species in the dynamics of weeds in agroforestry systems in Yucatan, Mexico]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Tzuc-Martínez]]></surname>
<given-names><![CDATA[Rodrigo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Casanova-Lugo]]></surname>
<given-names><![CDATA[Fernando]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Caamal-Maldonado]]></surname>
<given-names><![CDATA[Arturo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Tun-Garrido]]></surname>
<given-names><![CDATA[Juan]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[González-Valdivia]]></surname>
<given-names><![CDATA[Noel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cetzal-Ix]]></surname>
<given-names><![CDATA[William]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Autónoma de Yucatán  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Tecnológico de la Zona Maya  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Instituto Tecnológico de Chiná  ]]></institution>
<addr-line><![CDATA[Campeche ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>05</month>
<year>2017</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>05</month>
<year>2017</year>
</pub-date>
<volume>51</volume>
<numero>3</numero>
<fpage>315</fpage>
<lpage>328</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1405-31952017000300315&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1405-31952017000300315&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1405-31952017000300315&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Los factores limitantes para la producción de maíz en Yucatán, México son la reducción en el rendimiento y aumento constante de especies arvenses. Una estrategia para enfrentar esos problemas es desarrollar esquemas productivos diversificados, como los sistemas agroforestales (SAF). En nuestro estudio se determinó la dinámica de la cobertura y biomasa de arvenses en un SAF integrado por árboles forrajeros y maíz durante dos ciclos de cultivo (CC). Para ello se evaluaron Leucaena leucocephala, Guazuma ulmifolia, y Moringa oleifera asociadas a maíz, y un monocultivo de esta especie en una parcela, con un diseño de bloques completos al azar y tres repeticiones. La cobertura, biomasa, riqueza y densidad de arvenses se midieron al inicio, a la mitad y al final de dos CC. Las arvenses recolectadas estaban en cuadros de 50x50 cm, distribuidas aleatoriamente en las unidades experimentales; luego, se separaron por especie y secaron. Con los datos se usó un ANDEVA y cuando hubo significancia se realizó la prueba de Tukey (p&#8804;0.05). Al inicio del primer CC, el SAF Guazuma + maíz tuvo menor (41%) cobertura de arvenses y Moringa + maíz fue mayor a la mitad y al final (71 y 49%). Al inicio del segundo CC el sistema Guazuma + maíz tuvo menor cobertura de arvenses y al final, Guazuma + maíz y Leucaena + maíz fueron menores (54 y 48%). En ambos CC la biomasa de arvenses en los SAF fue casi la mitad que en maíz, en ambos CC la biomasa de arvenses en los SAF fue casi la mitad que en maíz en monocultivo. Al final de ambos CC el sistema Guazuma + maíz tuvo menor riqueza que en monocultivo de maíz. En los dos CC, al inicio y al final la densidad de arvenses fue mayor en el monocultivo. Dieciocho familias botánicas se identificaron y 21% de ellas son leguminosas. La supresión de arvenses en los SAF fue 23 a 36%. Las especies leñosas en SAF reducen la cobertura y biomasa de arvenses en comparación con el maíz en monocultivo.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The factors that limit maize production in Yucatán, México are decreasing yields and a constant increase of weedy species. A strategy to deal with these problems is to develop diversified productive schemes, such as agroforestry systems (SAF). This study determined the cover dynamics and biomass of weeds in an SAF composed of forage trees and maize during two cropping cycles (CC). Leucaena leucocephala, Guazuma ulmifolia, and Moringa oleifera, associated with maize, and a plot of maize monocrop were evaluated with a complete random block design with three replications. Weed cover, biomass, diversity and density were measured at the beginning, middle and end of the two CC. The weeds were collected in squares delimited by 50x50 cm frames distributed randomly in each experimental unit, separated by species and dried. With this data, an ANOVA was performed, and when significance was detected, the Tukey test (p&#8804;0.05) was used. At the beginning of the first CC, the SAF Guazuma + maize had lower weed cover (41%), while Moringa + maize was higher at the middle and end (71 and 49%). At the beginning of the second CC, the Guazuma + maize SAF had less weed cover, and Guazuma + maize and Leucaena + maize were lower (54 and 48%). In both CC, weed biomass in the SAF was almost half that of monocropped maize. At the end of both CC, the Guazuma + maize system had less weed diversity than the maize monocrop. At the beginning and end of the two CC, weed density was greater in the monocrop. Eighteen botanical families were identified and, of these, 21% were leguminous. The suppression of weeds in the SAF was 23 to 36%. Woody species in SAF reduce weed cover and biomass, relative to maize monocrop.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Arvenses]]></kwd>
<kwd lng="es"><![CDATA[sistemas agroforestales]]></kwd>
<kwd lng="es"><![CDATA[cobertura]]></kwd>
<kwd lng="es"><![CDATA[biomasa]]></kwd>
<kwd lng="es"><![CDATA[supresión]]></kwd>
<kwd lng="en"><![CDATA[Weeds]]></kwd>
<kwd lng="en"><![CDATA[agroforestry systems]]></kwd>
<kwd lng="en"><![CDATA[cover]]></kwd>
<kwd lng="en"><![CDATA[biomass]]></kwd>
<kwd lng="en"><![CDATA[suppression]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ayala-Sánchez]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Krishnamurthy]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
<name>
<surname><![CDATA[Basulto-Graniel]]></surname>
<given-names><![CDATA[J. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Leos-Rodríguez]]></surname>
<given-names><![CDATA[J. A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Native tree legumes for improvement of slash-and-burn maize system in Yucatan, Mexico]]></article-title>
<source><![CDATA[Terra Latinoam]]></source>
<year>2007</year>
<volume>25</volume>
<page-range>195-202</page-range></nlm-citation>
</ref>
<ref id="B2">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bainard]]></surname>
<given-names><![CDATA[L. D]]></given-names>
</name>
<name>
<surname><![CDATA[Koch]]></surname>
<given-names><![CDATA[A. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Gordon]]></surname>
<given-names><![CDATA[A. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Klironomos]]></surname>
<given-names><![CDATA[J. N.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Growth response of crops to soil microbial communities from conventional monocropping and tree-based intercropping systems]]></article-title>
<source><![CDATA[Plant Soil]]></source>
<year>2013</year>
<volume>363</volume>
<page-range>345-56</page-range></nlm-citation>
</ref>
<ref id="B3">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Balandier]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Collet]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Miller]]></surname>
<given-names><![CDATA[J. H.]]></given-names>
</name>
<name>
<surname><![CDATA[Reynolds]]></surname>
<given-names><![CDATA[P. E.]]></given-names>
</name>
<name>
<surname><![CDATA[Zedaker]]></surname>
<given-names><![CDATA[S. M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Designing forest vegetation management strategies based on the mechanisms and dynamics of crop tree competition by neighboring vegetation]]></article-title>
<source><![CDATA[Forestry]]></source>
<year>2006</year>
<volume>79</volume>
<page-range>3-27</page-range></nlm-citation>
</ref>
<ref id="B4">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Barbier]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Gosselin]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
<name>
<surname><![CDATA[Balandier]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Influence of tree species on understory vegetation diversity and mechanisms involved a critical review for temperate and boreal forests]]></article-title>
<source><![CDATA[For. Ecol. Manage]]></source>
<year>2008</year>
<volume>254</volume>
<page-range>1-15</page-range></nlm-citation>
</ref>
<ref id="B5">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bautista]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Palacio-Aponte]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Quintana]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[Zinck]]></surname>
<given-names><![CDATA[J. A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Spatial distribution and development of soils in tropical karst areas from the Peninsula of Yucatan, Mexico]]></article-title>
<source><![CDATA[Geomorphology]]></source>
<year>2011</year>
<volume>135</volume>
<page-range>308-21</page-range></nlm-citation>
</ref>
<ref id="B6">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bellon]]></surname>
<given-names><![CDATA[M. R]]></given-names>
</name>
<name>
<surname><![CDATA[Hodson]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[Hellin]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Assessing the vulnerability of traditional maize seed systems in Mexico to climate change]]></article-title>
<source><![CDATA[Proc. Natl. Acad. Sci]]></source>
<year>2011</year>
<volume>108</volume>
<page-range>13432-7</page-range></nlm-citation>
</ref>
<ref id="B7">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Blanco]]></surname>
<given-names><![CDATA[Y]]></given-names>
</name>
<name>
<surname><![CDATA[Leyva]]></surname>
<given-names><![CDATA[Á]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Abundancia y diversidad de especies de arvenses en el cultivo de maíz (Zea mays, L.) Precedido de un barbecho transitorio después de la papa (Solanum tuberosum L.)]]></article-title>
<source><![CDATA[Cultivos Trop]]></source>
<year>2010</year>
<volume>31</volume>
<page-range>12-6</page-range></nlm-citation>
</ref>
<ref id="B8">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Caamal-Maldonado]]></surname>
<given-names><![CDATA[J. A]]></given-names>
</name>
<name>
<surname><![CDATA[Jiménez-Osornio]]></surname>
<given-names><![CDATA[J. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Torres-Barragán]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Anaya]]></surname>
<given-names><![CDATA[A. L.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The use allelopathic legume cover and mulch species for weed control in cropping systems]]></article-title>
<source><![CDATA[Agron. J.]]></source>
<year>2001</year>
<volume>93</volume>
<page-range>27-36</page-range></nlm-citation>
</ref>
<ref id="B9">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Caamal-Maldonado]]></surname>
<given-names><![CDATA[J. A]]></given-names>
</name>
<name>
<surname><![CDATA[Casanova-Lugo]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
<name>
<surname><![CDATA[González-Moreno]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Caamal-Caamal]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Xiu-Canché]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[Navarro]]></surname>
<given-names><![CDATA[A. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Castillo-Caamal]]></surname>
<given-names><![CDATA[J. B.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Producción de alimento, forraje y servicios ambientales de sistemas agroforestales en Yucatán, México]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Castelán]]></surname>
<given-names><![CDATA[O]]></given-names>
</name>
<name>
<surname><![CDATA[Álvarez-Macías]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Bernués-Jal]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Ku-Vera]]></surname>
<given-names><![CDATA[J. C.]]></given-names>
</name>
<name>
<surname><![CDATA[Silveira]]></surname>
<given-names><![CDATA[V.]]></given-names>
</name>
</person-group>
<source><![CDATA[Avances de Investigación en Producción Animal en Iberoamérica]]></source>
<year>2012</year>
<page-range>79-104</page-range><publisher-loc><![CDATA[México ]]></publisher-loc>
<publisher-name><![CDATA[Ediciones de la UADY]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B10">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Casanova-Lugo]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Petit-Aldana]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Solorio-Sánchez]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
<name>
<surname><![CDATA[Parsons]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[Ramírez-Avilés]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Forage yield and quality of Leucaena leucocephala and Guazuma ulmifolia in mixed and pure fodder banks systems in Yucatan, Mexico]]></article-title>
<source><![CDATA[Agrofor. Syst]]></source>
<year>2014</year>
<volume>88</volume>
<page-range>29-39</page-range></nlm-citation>
</ref>
<ref id="B11">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Casanova-Lugo]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Ramírez-Avilés]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
<name>
<surname><![CDATA[Solorio-Sánchez]]></surname>
<given-names><![CDATA[F. J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Effect of pruning interval on foliage and root biomass in forage tree species in monoculture and in association]]></article-title>
<source><![CDATA[Trop. Subtrop. Agroecosyst]]></source>
<year>2010</year>
<volume>12</volume>
<page-range>33-41</page-range></nlm-citation>
</ref>
<ref id="B12">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Charudattan]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Biological control of weeds by means of plant pathogens: Significance for integrated weed management in modern agro-ecology]]></article-title>
<source><![CDATA[BioControl]]></source>
<year>2001</year>
<volume>46</volume>
<page-range>229-60</page-range></nlm-citation>
</ref>
<ref id="B13">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Cummings]]></surname>
<given-names><![CDATA[J. A]]></given-names>
</name>
<name>
<surname><![CDATA[Parker]]></surname>
<given-names><![CDATA[I. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Gilbert]]></surname>
<given-names><![CDATA[G. S.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Allelopathy: a tool for weed management in forest restoration]]></article-title>
<source><![CDATA[Plant Ecol]]></source>
<year>2012</year>
<volume>213</volume>
<page-range>1975-89</page-range></nlm-citation>
</ref>
<ref id="B14">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ferrari]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Ferrari]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Ferrari]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
</person-group>
<source><![CDATA[CobCal v 2.1]]></source>
<year>2006</year>
<publisher-loc><![CDATA[Paraguay ]]></publisher-loc>
<publisher-name><![CDATA[Instituto Nacional de Tecnología Agropecuaria]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B15">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gallegos-Pérez]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Caamal-Maldonado]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Casanova-Lugo]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
<name>
<surname><![CDATA[Tzuc-Martínez]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Rendimiento de forraje de especies arbóreas en sistemas agroforestales y su uso como abono verde para el maíz]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Chay-Canul]]></surname>
<given-names><![CDATA[A.J]]></given-names>
</name>
<name>
<surname><![CDATA[Casanova-Lugo]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
</person-group>
<source><![CDATA[La contribución del sector pecuario a la seguridad alimentaria en México]]></source>
<year>2013</year>
<page-range>943-6</page-range><publisher-loc><![CDATA[Villahermosa, Tabasco, México ]]></publisher-loc>
<publisher-name><![CDATA[UJAT]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B16">
<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 de Köppen]]></source>
<year>1988</year>
<publisher-loc><![CDATA[D.F ]]></publisher-loc>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B17">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Graefe]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
</person-group>
<source><![CDATA[Crop and Soil Variability in Traditional and Modern Mayan Maize Cultivation of Yucatán, Mexico]]></source>
<year>2003</year>
<publisher-name><![CDATA[Kassel University Press]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B18">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gutiérrez-Báez]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Zamora-Crescencio]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Especies leñosas de la selva baja caducifolia de Xmatkuil, Yucatán, México]]></article-title>
<source><![CDATA[Foresta Veracruzana]]></source>
<year>2012</year>
<volume>14</volume>
<page-range>9-14</page-range></nlm-citation>
</ref>
<ref id="B19">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Jama]]></surname>
<given-names><![CDATA[B]]></given-names>
</name>
<name>
<surname><![CDATA[Getahun]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Ngugi]]></surname>
<given-names><![CDATA[D. N.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Shading effects of alley cropped Leucaena leucocephala on weed biomass and maize yield at Mtwapa, Coast Province, Kenya]]></article-title>
<source><![CDATA[Agrofor. Syst]]></source>
<year>1991</year>
<volume>13</volume>
<page-range>1-11</page-range></nlm-citation>
</ref>
<ref id="B20">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Latournerie]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Tuxill]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Yupit-Moo]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<name>
<surname><![CDATA[Arias-Reyes]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
<name>
<surname><![CDATA[Alejo]]></surname>
<given-names><![CDATA[J. C.]]></given-names>
</name>
<name>
<surname><![CDATA[Jarvis]]></surname>
<given-names><![CDATA[D. I.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Traditional Maize Storage Methods of Mayan Farmers in Yucatan, Mexico: Implications for seed selection and crop diversity]]></article-title>
<source><![CDATA[Biodivers. Conserv]]></source>
<year>2006</year>
<volume>15</volume>
<page-range>1771-95</page-range></nlm-citation>
</ref>
<ref id="B21">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Lin]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Tsuzuki]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<name>
<surname><![CDATA[Dong]]></surname>
<given-names><![CDATA[Y.]]></given-names>
</name>
<name>
<surname><![CDATA[Terao]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
<name>
<surname><![CDATA[Xuan]]></surname>
<given-names><![CDATA[T. D.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Potential biological control of weeds in rice fields by allelopathy of dwarf lilyturf plants]]></article-title>
<source><![CDATA[Biocontrol]]></source>
<year>2004</year>
<volume>49</volume>
<page-range>187-96</page-range></nlm-citation>
</ref>
<ref id="B22">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Pacini]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Wossink]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Giesen]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Vazzana]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Huirne]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Evaluation of sustainability of organic, integrated and conventional farming systems: a farm and field-scale analysis]]></article-title>
<source><![CDATA[Agric. Ecosyst. Environ]]></source>
<year>2003</year>
<volume>95</volume>
<page-range>273-88</page-range></nlm-citation>
</ref>
<ref id="B23">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rippin]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Haggar]]></surname>
<given-names><![CDATA[J. P.]]></given-names>
</name>
<name>
<surname><![CDATA[Kass]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[Kopke]]></surname>
<given-names><![CDATA[U.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Alley cropping and mulching with Erythrina poeppigiana (Walp.) O. F. Cook and Gliricidia sepium (Jacq.) Walp.: effects on maize/weed competition]]></article-title>
<source><![CDATA[Agrofor. Syst]]></source>
<year>1994</year>
<volume>25</volume>
<page-range>119-34</page-range></nlm-citation>
</ref>
<ref id="B24">
<nlm-citation citation-type="book">
<collab>SAS</collab>
<source><![CDATA[Statistical Analysis System, Users]]></source>
<year>2004</year>
<publisher-loc><![CDATA[Cary, N.C. USA ]]></publisher-loc>
<publisher-name><![CDATA[SAS Institute]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B25">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Segura-Rosel]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Casanova-Lugo]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
<name>
<surname><![CDATA[Solorio-Sánchez]]></surname>
<given-names><![CDATA[F. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Chay-Canul]]></surname>
<given-names><![CDATA[A. J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Association of woody species in fodder banks: influence on litter production, decomposition and nitrogen release]]></article-title>
<source><![CDATA[Trop. Subtrop. Agroecosyst]]></source>
<year>2012</year>
<volume>15</volume>
<page-range>61-9</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
