<?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>0187-5779</journal-id>
<journal-title><![CDATA[Terra Latinoamericana]]></journal-title>
<abbrev-journal-title><![CDATA[Terra Latinoam]]></abbrev-journal-title>
<issn>0187-5779</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Mexicana de la Ciencia del Suelo A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0187-57792017000100051</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Procesos físicos del suelo en la reserva ecológica del Pedregal de San Ángel de Ciudad Universitaria: atributos para su conservación]]></article-title>
<article-title xml:lang="en"><![CDATA[Physical processes of soil in Pedregal de San Angel ecological reserve: attributes for conservation]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Castellanos Vargas]]></surname>
<given-names><![CDATA[Iván]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García Calderón]]></surname>
<given-names><![CDATA[Norma E.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cano Santana]]></surname>
<given-names><![CDATA[Zenón]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional Autónoma de México Departamento de Ecología y Recursos Naturales Facultad de Ciencias]]></institution>
<addr-line><![CDATA[Cd. de México ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional Autónoma de México Departamento de Ecología y Recursos Naturales Facultad de Ciencias]]></institution>
<addr-line><![CDATA[Cd. de México ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Nacional Autónoma de México Unidad Multidisciplinaria de Docencia e Investigación Facultad de Ciencias]]></institution>
<addr-line><![CDATA[ Querétaro]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2017</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2017</year>
</pub-date>
<volume>35</volume>
<numero>1</numero>
<fpage>51</fpage>
<lpage>64</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0187-57792017000100051&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0187-57792017000100051&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0187-57792017000100051&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: La Reserva Ecológica del Pedregal de San Ángel de Ciudad Universitaria (REPSA-CU) alberga una fracción del derrame original de lava del volcán Xitle y actualmente el suelo y la comunidad vegetal son afectados por la fragmentación del paisaje, el depósito de residuos de relleno (como cascajo y otros materiales) y las construcciones irregulares. Se realizó una descripción de las principales propiedades físicas del suelo en sitios con topografía contrastante (planos abiertos conservados y perturbados, grietas y hondonadas). Se encontró un efecto significativo de la topografía sobre las propiedades edáficas. La materia orgánica mostró correlaciones positivas con la porosidad, la arcilla y la humedad; y mostró correlaciones negativas con la densidad aparente y real, la compactación, la acidez y el contenido de arena. El porcentaje de materia orgánica fue el atributo más importante para la clasificación y el ordenamiento canónico de los sitios. Los planos abiertos perturbados siguieron una trayectoria edafogénica diferente de los sitios conservados y asemejan Urbanosoles. Se sugiere la implementación de estrategias encaminadas a lograr su restauración ecológica. La clasificación del suelo de esta reserva corresponde a tres órdenes probables: 1) Entisol háplico, por la edad geológica de su deposición y los procesos de pedogénesis en curso; 2) Leptosol lítico vítrico, por la recurrencia de afloramientos rocosos lávicos de origen magmático y 3) Andosol vítrico por la naturaleza de su material parental y predominancia de arenas. Se concluye que el suelo de la REPSA-CU es incipiente y actualmente los horizontes de diagnóstico están en proceso de desarrollo. La importancia ambiental de su suelo radica en su capacidad de filtración y retención de agua; su porosidad y compactación le permiten ser un banco de semillas y hábitat de diversas especies de insectos. La fragilidad de los agregados edáficos y la predominancia textural de arena representaron un factor latente de erosión.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Summary: The Pedregal de San Angel Ecological Reserve at Ciudad Universitaria (PSAER-CU) has a fraction of the original lava spill of Xitle volcano and currently the soil and plant community are affected by the landscape fragmentation, construction waste filler (such as rubble and other materials) and irregular constructions. A description of the main physical properties of soil in sites with contrasting topography (open preserved and disturbed planes, rifts and hollows) was made. A significant effect of topography on edaphic properties was found. Organic matter fraction showed positive correlations with the percentages fractions of porosity, clay and moisture, and also showed negative correlations with the bulk and particle densities values, compaction, acidity and sand content. The percentage of organic matter was the most important attribute for the analysis classification of sites. The disturbed open plots followed a different edaphogenic path from the conserved sites and resembled Urbanosols. It is suggested the implementation of strategies aimed at achieving its ecological restoration. The soil classification corresponds to three probable orders: 1) Haplic Entisol by the recent geological age of deposition and currently underway pedogenesis processes; 2) Vitric Lithic Leptosol by the recurrence of magmatic rock outcrops and 3) Vitric Andosol by the nature of the parent material and textural predominance of sands. It is concluded that the soil of the PSAER-CU is incipient and currently the diagnostic horizons are in development process. Soil environmental importance lies in its capacity of water filtration and retention; its porosity and compaction allow it to be a seed bank and habitat of diverse insect species. Fragility of edaphic aggregates and the textural predominance of sand represented a latent erosion factor.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[porosidad]]></kwd>
<kwd lng="es"><![CDATA[restauración ecológica]]></kwd>
<kwd lng="es"><![CDATA[textura]]></kwd>
<kwd lng="es"><![CDATA[Xitle]]></kwd>
<kwd lng="en"><![CDATA[porosity]]></kwd>
<kwd lng="en"><![CDATA[ecological restoration]]></kwd>
<kwd lng="en"><![CDATA[texture]]></kwd>
<kwd lng="en"><![CDATA[Xitle]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Soil aggregation some facts and fallacies as seen by microbiologist]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Allison]]></surname>
<given-names><![CDATA[F. E.]]></given-names>
</name>
</person-group>
<source><![CDATA[Soil Sci]]></source>
<year>1968</year>
<volume>106</volume>
<page-range>136-43</page-range></nlm-citation>
</ref>
<ref id="B2">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Proyecto para la creación de una reserva en el Pedregal de San Ángel]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Álvares]]></surname>
<given-names><![CDATA[S. F.]]></given-names>
</name>
<name>
<surname><![CDATA[Carabias L.]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Meave C.]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Moreno C.]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[Nava F.]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[Rodríguez Z.]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
<name>
<surname><![CDATA[Tovar G.]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Valiente B.]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<source><![CDATA[Cuadernos de Ecología]]></source>
<year>1982</year>
<numero>1</numero>
<issue>1</issue>
<publisher-loc><![CDATA[México, D. F. ]]></publisher-loc>
<publisher-name><![CDATA[Facultad de Ciencias]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B3">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Water flow and conductivity into capillary and non-capillary pores of soils]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Amer]]></surname>
<given-names><![CDATA[A. M.]]></given-names>
</name>
</person-group>
<source><![CDATA[J. Soil Sci. Plant Nutr]]></source>
<year>2012</year>
<volume>12</volume>
<page-range>99-112</page-range></nlm-citation>
</ref>
<ref id="B4">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Arango-Galván]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Cutz-Pool]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
<name>
<surname><![CDATA[Cano-Santana]]></surname>
<given-names><![CDATA[Z.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Estructura de la comunidad de colémbolos del mantillo]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Lot]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Cano-Santana]]></surname>
<given-names><![CDATA[Z.]]></given-names>
</name>
</person-group>
<source><![CDATA[Biodiversidad del ecosistema del Pedregal de San Ángel]]></source>
<year>2009</year>
<page-range>395-402</page-range><publisher-loc><![CDATA[México, D. F. ]]></publisher-loc>
<publisher-name><![CDATA[UNAM]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B5">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Baver]]></surname>
<given-names><![CDATA[L. D.]]></given-names>
</name>
<name>
<surname><![CDATA[Gardner]]></surname>
<given-names><![CDATA[W. H.]]></given-names>
</name>
<name>
<surname><![CDATA[Gardner]]></surname>
<given-names><![CDATA[W. R.]]></given-names>
</name>
</person-group>
<source><![CDATA[Física de suelos]]></source>
<year>1980</year>
<publisher-loc><![CDATA[México ]]></publisher-loc>
<publisher-name><![CDATA[U. T. E. H. A.]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B6">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Penetration of light into soil and its role in the control of seed germination]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bliss]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[Smith]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
</person-group>
<source><![CDATA[Plant Cell Environ]]></source>
<year>1985</year>
<volume>8</volume>
<page-range>475-83</page-range></nlm-citation>
</ref>
<ref id="B7">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Classification of soils in urban/industrial agglomerations in Germany and recommendations for the WRB]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Blume]]></surname>
<given-names><![CDATA[H. P.]]></given-names>
</name>
<name>
<surname><![CDATA[Giani]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
</person-group>
<source><![CDATA[Euras. Soil Sci]]></source>
<year>2005</year>
<volume>38</volume>
<page-range>72-4</page-range></nlm-citation>
</ref>
<ref id="B8">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[The hydrometer as a new method for the mechanical analysis of soils]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bouyoucos]]></surname>
<given-names><![CDATA[G. J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Soil Sci]]></source>
<year>1927</year>
<volume>23</volume>
<page-range>343-54</page-range></nlm-citation>
</ref>
<ref id="B9">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Brady]]></surname>
<given-names><![CDATA[N. C.]]></given-names>
</name>
<name>
<surname><![CDATA[Weil]]></surname>
<given-names><![CDATA[R. R.]]></given-names>
</name>
</person-group>
<source><![CDATA[The nature and properties of soils. Prentice Hall]]></source>
<year>2002</year>
<publisher-loc><![CDATA[NJ, USA ]]></publisher-loc>
<publisher-name><![CDATA[Upper Saddle River]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B10">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Restoration of ecosystem services and biodiversity: Con&#64258;icts and opportunities]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bullock]]></surname>
<given-names><![CDATA[J. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Aronson]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Newton]]></surname>
<given-names><![CDATA[A. C.]]></given-names>
</name>
<name>
<surname><![CDATA[Pywell]]></surname>
<given-names><![CDATA[R. F.]]></given-names>
</name>
<name>
<surname><![CDATA[Rey-Benayas]]></surname>
<given-names><![CDATA[J. M.]]></given-names>
</name>
</person-group>
<source><![CDATA[Trends Ecol. Evol]]></source>
<year>2011</year>
<volume>26</volume>
<page-range>541-9</page-range></nlm-citation>
</ref>
<ref id="B11">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Buol]]></surname>
<given-names><![CDATA[S.W.]]></given-names>
</name>
<name>
<surname><![CDATA[Southard]]></surname>
<given-names><![CDATA[R. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Graham]]></surname>
<given-names><![CDATA[R. C.]]></given-names>
</name>
<name>
<surname><![CDATA[McDaniel]]></surname>
<given-names><![CDATA[P. A.]]></given-names>
</name>
</person-group>
<source><![CDATA[Soil genesis and classification]]></source>
<year>2003</year>
<publisher-loc><![CDATA[NJ, USA ]]></publisher-loc>
<publisher-name><![CDATA[Wiley-Blackwell]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B12">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Recompaction of a coastal loamy sand after deep tillage as a function of subsequent cumulative rainfall]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Busscher]]></surname>
<given-names><![CDATA[W. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Bauer]]></surname>
<given-names><![CDATA[P. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Frederick]]></surname>
<given-names><![CDATA[J. R.]]></given-names>
</name>
</person-group>
<source><![CDATA[Soil Tillage Res]]></source>
<year>2002</year>
<volume>68</volume>
<page-range>49-57</page-range></nlm-citation>
</ref>
<ref id="B13">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Species richness, spatial variation, and abundance of the soil seed bank of a secondary tropical rain forest]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Butler]]></surname>
<given-names><![CDATA[B. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Chazdon]]></surname>
<given-names><![CDATA[R. L.]]></given-names>
</name>
</person-group>
<source><![CDATA[Biotropica]]></source>
<year>1998</year>
<volume>30</volume>
<page-range>214-22</page-range></nlm-citation>
</ref>
<ref id="B14">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Soil binding properties of mucilage produced by a basidiomycete fungus in a model system]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Caesar-Tonthat]]></surname>
<given-names><![CDATA[T. C.]]></given-names>
</name>
</person-group>
<source><![CDATA[Mycol. Res.]]></source>
<year>2002</year>
<volume>106</volume>
<page-range>930-7</page-range></nlm-citation>
</ref>
<ref id="B15">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Sucesión primaria en derrames volcánicos: El caso del Xitle]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Cano-Santana]]></surname>
<given-names><![CDATA[Z.]]></given-names>
</name>
<name>
<surname><![CDATA[Meave]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Ciencias]]></source>
<year>1996</year>
<volume>41</volume>
<page-range>58-68</page-range></nlm-citation>
</ref>
<ref id="B16">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Carrillo]]></surname>
<given-names><![CDATA[T. C.]]></given-names>
</name>
</person-group>
<source><![CDATA[El Pedregal de San Ángel]]></source>
<year>1995</year>
<publisher-loc><![CDATA[México, D. F. ]]></publisher-loc>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B17">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Soil quality for sustainable land management: organic matter and aggregation interactions that maintain soil functions]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Carter]]></surname>
<given-names><![CDATA[M. R.]]></given-names>
</name>
</person-group>
<source><![CDATA[Agron. J.]]></source>
<year>2002</year>
<volume>94</volume>
<page-range>38-47</page-range></nlm-citation>
</ref>
<ref id="B18">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Castellanos]]></surname>
<given-names><![CDATA[J. Z.]]></given-names>
</name>
<name>
<surname><![CDATA[Uvalle-Bueno]]></surname>
<given-names><![CDATA[J. X.]]></given-names>
</name>
<name>
<surname><![CDATA[Santelises]]></surname>
<given-names><![CDATA[A. Aguilar]]></given-names>
</name>
</person-group>
<source><![CDATA[Manual de interpretación de análisis de suelos y aguas]]></source>
<year>2000</year>
<publisher-loc><![CDATA[México, D. F. ]]></publisher-loc>
<publisher-name><![CDATA[Instituto de Capacitación para la Productividad Agrícola. México]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B19">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Dinámica y conservación de la &#64258;ora del matorral xerófilo de la Reserva Ecológica del Pedregal de San Ángel (D. F., México)]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Castillo-Argüero]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Montes-Cartas]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Romero-Romero]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Martínez-Orea]]></surname>
<given-names><![CDATA[Y.]]></given-names>
</name>
<name>
<surname><![CDATA[Guadarrama-Chávez]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[Sánchez-Gallén]]></surname>
<given-names><![CDATA[I.]]></given-names>
</name>
<name>
<surname><![CDATA[Núñez-Castillo]]></surname>
<given-names><![CDATA[O.]]></given-names>
</name>
</person-group>
<source><![CDATA[Bol. Soc. Bot. Méx]]></source>
<year>2004</year>
<volume>74</volume>
<page-range>51-75</page-range></nlm-citation>
</ref>
<ref id="B20">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Castillo-Argüero]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Martínez-Orea]]></surname>
<given-names><![CDATA[Y.]]></given-names>
</name>
<name>
<surname><![CDATA[Meave]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Hernández-Apolinar]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Núñez-Castillo]]></surname>
<given-names><![CDATA[O.]]></given-names>
</name>
<name>
<surname><![CDATA[Santibáñez-Andrade]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Guadarrama-Chávez]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Flora; susceptibilidad de la comunidad a la invasión de malezas nativas y exóticas]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Lot]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Cano-Santana]]></surname>
<given-names><![CDATA[Z.]]></given-names>
</name>
</person-group>
<source><![CDATA[Biodiversidad del ecosistema del Pedregal de San Ángel]]></source>
<year>2009</year>
<page-range>107-33</page-range><publisher-loc><![CDATA[México, D. F. ]]></publisher-loc>
<publisher-name><![CDATA[UNAM]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B21">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Castillo-Argüero]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Martínez-Orea]]></surname>
<given-names><![CDATA[Y.]]></given-names>
</name>
<name>
<surname><![CDATA[Romero-Romero]]></surname>
<given-names><![CDATA[M. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Guadarrama-Chávez]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[Núñez-Castillo]]></surname>
<given-names><![CDATA[O.]]></given-names>
</name>
<name>
<surname><![CDATA[Sánchez-Gallén]]></surname>
<given-names><![CDATA[I.]]></given-names>
</name>
<name>
<surname><![CDATA[Meave]]></surname>
<given-names><![CDATA[J. A.]]></given-names>
</name>
</person-group>
<source><![CDATA[La Reserva Ecológica del Pedregal de San Ángel: Aspectos florísticos y ecológicos]]></source>
<year>2007</year>
<publisher-loc><![CDATA[México, D. F. ]]></publisher-loc>
<publisher-name><![CDATA[Departamento de Ecología y Recursos Naturales]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B22">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Certini]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Scalenghe]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<source><![CDATA[Soils: Basic concepts and future challenges]]></source>
<year>2006</year>
<publisher-loc><![CDATA[Cambridge ]]></publisher-loc>
<publisher-name><![CDATA[Cambridge University Press]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B23">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Seed entrapment in alpine ecosystems: Effects of soil particle size and diaspore morphology]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Chambers]]></surname>
<given-names><![CDATA[J. C.]]></given-names>
</name>
<name>
<surname><![CDATA[MacMahon]]></surname>
<given-names><![CDATA[J. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Haefner]]></surname>
<given-names><![CDATA[J. H.]]></given-names>
</name>
</person-group>
<source><![CDATA[Ecology]]></source>
<year>1991</year>
<volume>72</volume>
<page-range>1668-77</page-range></nlm-citation>
</ref>
<ref id="B24">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Degradation of soil structure due to coalescence of aggregates in no-till, no-traffic beds in irrigated crops]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Cockroft]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
<name>
<surname><![CDATA[Olsson]]></surname>
<given-names><![CDATA[K. A.]]></given-names>
</name>
</person-group>
<source><![CDATA[Aust. J. Soil Res.]]></source>
<year>2000</year>
<volume>38</volume>
<page-range>61-70</page-range></nlm-citation>
</ref>
<ref id="B25">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Cuanalo de la Cerda]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
</person-group>
<source><![CDATA[Manual para la descripción de perf iles de suelo en el campo]]></source>
<year>1990</year>
<publisher-loc><![CDATA[Estado de México, México ]]></publisher-loc>
<publisher-name><![CDATA[Centro de Edafología]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B26">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Effect of soil depth on seedling emergence in tropical soil seed-bank investigations]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Dalling]]></surname>
<given-names><![CDATA[J. W.]]></given-names>
</name>
<name>
<surname><![CDATA[Swaine]]></surname>
<given-names><![CDATA[M. D.]]></given-names>
</name>
<name>
<surname><![CDATA[Garwood]]></surname>
<given-names><![CDATA[N. C.]]></given-names>
</name>
</person-group>
<source><![CDATA[Funct. Ecol]]></source>
<year>1995</year>
<volume>9</volume>
<page-range>119-21</page-range></nlm-citation>
</ref>
<ref id="B27">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Olivines their pseudomorphs and secondary products]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Delvigne]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Bisdom]]></surname>
<given-names><![CDATA[E. B. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Sleeman]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Stoops]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
</person-group>
<source><![CDATA[Pedologie]]></source>
<year>1979</year>
<volume>29</volume>
<page-range>247-309</page-range></nlm-citation>
</ref>
<ref id="B28">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Las lavas del Pedregal de San Ángel]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Enciso de la Vega]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<source><![CDATA[CONACyT. Ciencia y Desarrollo]]></source>
<year>1979</year>
<volume>25</volume>
<page-range>89-93</page-range></nlm-citation>
</ref>
<ref id="B29">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gandoy-Bernasconi]]></surname>
<given-names><![CDATA[W.]]></given-names>
</name>
</person-group>
<source><![CDATA[Manual de laboratorio para el manejo físico de los suelos: Temporal y riego, parcela y cuenca]]></source>
<year>1991</year>
<publisher-loc><![CDATA[Chapingo, Estado de México, México ]]></publisher-loc>
<publisher-name><![CDATA[Universidad Autónoma Chapingo]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B30">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Variación de la velocidad de infiltración media en seis ecosistemas inalterados]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[García-Hernández]]></surname>
<given-names><![CDATA[M. A.]]></given-names>
</name>
<name>
<surname><![CDATA[García-Hernández]]></surname>
<given-names><![CDATA[M. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Castellanos-Vargas]]></surname>
<given-names><![CDATA[I.]]></given-names>
</name>
<name>
<surname><![CDATA[Cano-Santana]]></surname>
<given-names><![CDATA[Z.]]></given-names>
</name>
<name>
<surname><![CDATA[Peláez-Rocha]]></surname>
<given-names><![CDATA[C. M.]]></given-names>
</name>
</person-group>
<source><![CDATA[Terra Latinoamericana]]></source>
<year>2008</year>
<volume>26</volume>
<page-range>21-7</page-range></nlm-citation>
</ref>
<ref id="B31">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gardiner]]></surname>
<given-names><![CDATA[D. T.]]></given-names>
</name>
<name>
<surname><![CDATA[Miller]]></surname>
<given-names><![CDATA[R. W.]]></given-names>
</name>
</person-group>
<source><![CDATA[Soils in our environment]]></source>
<year>2004</year>
<publisher-loc><![CDATA[Upper Saddle River, NJ, USA ]]></publisher-loc>
<publisher-name><![CDATA[Pearson Education]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B32">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Image analysis and three-dimensional modelling of pores in soil aggregates]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Glasbey]]></surname>
<given-names><![CDATA[C. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Horgan]]></surname>
<given-names><![CDATA[G. W.]]></given-names>
</name>
<name>
<surname><![CDATA[Darbyshire]]></surname>
<given-names><![CDATA[J. F.]]></given-names>
</name>
</person-group>
<source><![CDATA[J. Soil Sci]]></source>
<year>1991</year>
<volume>42</volume>
<page-range>479-86</page-range></nlm-citation>
</ref>
<ref id="B33">
<nlm-citation citation-type="book">
<collab>GDF</collab>
<source><![CDATA[Atlas geográfico del suelo de conservación del Distrito Federal]]></source>
<year>2012</year>
<publisher-loc><![CDATA[México ]]></publisher-loc>
<publisher-name><![CDATA[Secretaría del Medio Ambiente]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B34">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Differences in soil properties in adjacent stands of Scots pine, Norway spruce and silver birch in SW Sweden]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Hansson]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
<name>
<surname><![CDATA[Olsson]]></surname>
<given-names><![CDATA[B. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Olsson]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Johansson]]></surname>
<given-names><![CDATA[U.]]></given-names>
</name>
<name>
<surname><![CDATA[Kleja]]></surname>
<given-names><![CDATA[D. B.]]></given-names>
</name>
</person-group>
<source><![CDATA[For. Ecol. Manage]]></source>
<year>2011</year>
<volume>262</volume>
<page-range>522-30</page-range></nlm-citation>
</ref>
<ref id="B35">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Soil landscape systems: A model of soil genesis]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Huggett]]></surname>
<given-names><![CDATA[R. J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Geoderma]]></source>
<year>1975</year>
<volume>13</volume>
<page-range>1-22</page-range></nlm-citation>
</ref>
<ref id="B36">
<nlm-citation citation-type="book">
<collab>IUSS</collab>
<collab>Working Group WRB</collab>
<source><![CDATA[World reference base for soil resources 2006]]></source>
<year>2006</year>
<numero>103</numero>
<issue>103</issue>
<publisher-loc><![CDATA[Rome ]]></publisher-loc>
<publisher-name><![CDATA[FAO]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B37">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Jastrow]]></surname>
<given-names><![CDATA[J. D.]]></given-names>
</name>
<name>
<surname><![CDATA[Miller]]></surname>
<given-names><![CDATA[R. M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Soil aggregate stabilization and carbon sequestration: Feedbacks through organomineral associations]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Lal]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Kimble]]></surname>
<given-names><![CDATA[J. K.]]></given-names>
</name>
<name>
<surname><![CDATA[Follet]]></surname>
<given-names><![CDATA[R. F.]]></given-names>
</name>
<name>
<surname><![CDATA[Stewart]]></surname>
<given-names><![CDATA[B. A.]]></given-names>
</name>
</person-group>
<source><![CDATA[Soil processes and the Carbon Cycle]]></source>
<year>1998</year>
<page-range>207-23</page-range><publisher-loc><![CDATA[Boca Raton, FL, USA ]]></publisher-loc>
<publisher-name><![CDATA[CRC Press]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B38">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Short-term responses of soil decomposer and plant communities to stump harvesting in boreal forests]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Kataja-aho]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Fritze]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
<name>
<surname><![CDATA[Haimi]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
</person-group>
<source><![CDATA[For. Ecol. Manage]]></source>
<year>2011</year>
<volume>262</volume>
<page-range>379&#8209;388</page-range></nlm-citation>
</ref>
<ref id="B39">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[The chemical variability of some common igneous rocks]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Le Maitre]]></surname>
<given-names><![CDATA[R. W.]]></given-names>
</name>
</person-group>
<source><![CDATA[J. Petrol]]></source>
<year>1976</year>
<volume>17</volume>
<page-range>589-98</page-range></nlm-citation>
</ref>
<ref id="B40">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[The major features of an infestation by the invasive weed legume gorse (Ulex europaeus) on volcanic soils in Hawaii]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Leary]]></surname>
<given-names><![CDATA[J. K.]]></given-names>
</name>
<name>
<surname><![CDATA[Hue]]></surname>
<given-names><![CDATA[N. V.]]></given-names>
</name>
<name>
<surname><![CDATA[Singleton]]></surname>
<given-names><![CDATA[P. W.]]></given-names>
</name>
<name>
<surname><![CDATA[Borthakur]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
</person-group>
<source><![CDATA[Biol. Fertil. Soils]]></source>
<year>2006</year>
<volume>42</volume>
<page-range>215-23</page-range></nlm-citation>
</ref>
<ref id="B41">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Lot]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Cano-Santana]]></surname>
<given-names><![CDATA[Z.]]></given-names>
</name>
</person-group>
<source><![CDATA[Biodiversidad del ecosistema del Pedregal de San Ángel]]></source>
<year>2009</year>
<publisher-loc><![CDATA[México, D. F. ]]></publisher-loc>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B42">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[McCarthy]]></surname>
<given-names><![CDATA[D. F.]]></given-names>
</name>
</person-group>
<source><![CDATA[Essentials of soil mechanics and foundations: Basic geotechnics]]></source>
<year>2007</year>
<publisher-loc><![CDATA[Upper Saddle River, NJ, USA ]]></publisher-loc>
<publisher-name><![CDATA[Pearson Prentice Hall]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B43">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Soil sampling for soil testing]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[McIntrye]]></surname>
<given-names><![CDATA[G. A.]]></given-names>
</name>
</person-group>
<source><![CDATA[J. Aust. Inst. Agric. Sci]]></source>
<year>1967</year>
<volume>33</volume>
<page-range>309-20</page-range></nlm-citation>
</ref>
<ref id="B44">
<nlm-citation citation-type="book">
<collab>Munsell color</collab>
<source><![CDATA[Munsell soil color chart]]></source>
<year>1992</year>
<publisher-loc><![CDATA[Grand Rapids, MI, USA ]]></publisher-loc>
<publisher-name><![CDATA[Munsell Color Company]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B45">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Earthworm humic matter produces auxin-like effects on Daucus carota cell growth and nitrate metabolism]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Muscolo]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Bovalo]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
<name>
<surname><![CDATA[Gionfriddo]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
<name>
<surname><![CDATA[Nardi]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<source><![CDATA[Soil Biol. Biochem]]></source>
<year>1999</year>
<volume>31</volume>
<page-range>1303-11</page-range></nlm-citation>
</ref>
<ref id="B46">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Use of arthropod diversity and abundance to evaluate cropping systems]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Olfert]]></surname>
<given-names><![CDATA[O.]]></given-names>
</name>
<name>
<surname><![CDATA[Johnson]]></surname>
<given-names><![CDATA[G. D.]]></given-names>
</name>
<name>
<surname><![CDATA[Brandt]]></surname>
<given-names><![CDATA[S. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Thomas]]></surname>
<given-names><![CDATA[A. G.]]></given-names>
</name>
</person-group>
<source><![CDATA[Agron. J.]]></source>
<year>2002</year>
<volume>94</volume>
<page-range>210-6</page-range></nlm-citation>
</ref>
<ref id="B47">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ordóñez]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<name>
<surname><![CDATA[Alzate]]></surname>
<given-names><![CDATA[Antonio]]></given-names>
</name>
</person-group>
<source><![CDATA[El Pedregal de San Ángel; apuntes para la petrología del Valle de México]]></source>
<year>1890</year>
<volume>4</volume>
<page-range>115</page-range><publisher-name><![CDATA[Mem. Soc. Cient.]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B48">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ottonello]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
</person-group>
<source><![CDATA[Principles of geochemistry]]></source>
<year>1997</year>
<publisher-loc><![CDATA[New York, NY, USA ]]></publisher-loc>
<publisher-name><![CDATA[Columbia University Press]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B49">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Paul]]></surname>
<given-names><![CDATA[E. A.]]></given-names>
</name>
</person-group>
<source><![CDATA[Soil microbiology ecology and biochemistry]]></source>
<year>2007</year>
<publisher-loc><![CDATA[New York, NY, USA ]]></publisher-loc>
<publisher-name><![CDATA[Academic Press]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B50">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Peralta H.]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Prado M.]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Los límites y la cartografía]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Lot]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Cano-Santana]]></surname>
<given-names><![CDATA[.]]></given-names>
</name>
</person-group>
<source><![CDATA[Biodiversidad del ecosistema del Pedregal de San Ángel]]></source>
<year>2009</year>
<page-range>27-42</page-range><publisher-loc><![CDATA[México, D. F. ]]></publisher-loc>
<publisher-name><![CDATA[UNAM]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B51">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[The supramolecular structure of humic substances a novel understanding of humus chemistry and implications in soil science]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Piccolo]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<source><![CDATA[Adv. Agron.]]></source>
<year>2002</year>
<volume>75</volume>
<page-range>57-134</page-range></nlm-citation>
</ref>
<ref id="B52">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Redondo Arámburo]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<source><![CDATA[Manual de edafología general]]></source>
<year>1988</year>
<publisher-loc><![CDATA[México ]]></publisher-loc>
<publisher-name><![CDATA[Universidad Autónoma de Sinaloa]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B53">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Vegetación del Pedregal de San Ángel (D.F., México)]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rzedowski]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<source><![CDATA[An. Esc. Nac. Cienc. Biol.]]></source>
<year>1954</year>
<volume>8</volume>
<page-range>59&#8209;129</page-range></nlm-citation>
</ref>
<ref id="B54">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rzedowski]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Vegetación de México]]></source>
<year>1978</year>
<publisher-loc><![CDATA[México, D. F. ]]></publisher-loc>
<publisher-name><![CDATA[Limusa]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B55">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[La heterogeneidad ambiental en un matorral xeróf ilo]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Santibáñez-Andrade]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Castillo-Argüero]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Zavala-Hurtado]]></surname>
<given-names><![CDATA[J. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Orea]]></surname>
<given-names><![CDATA[Y. Martínez]]></given-names>
</name>
<name>
<surname><![CDATA[Apolinar]]></surname>
<given-names><![CDATA[M. Hernández]]></given-names>
</name>
</person-group>
<source><![CDATA[Bol. Soc. Bot. Méx.]]></source>
<year>2009</year>
<volume>85</volume>
<page-range>71-9</page-range></nlm-citation>
</ref>
<ref id="B56">
<nlm-citation citation-type="confpro">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Schmitter V.]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
</person-group>
<source><![CDATA[Investigación petrológica en las lavas del Pedregal de San Ángel]]></source>
<year>1953</year>
<conf-name><![CDATA[ Congreso Científico Mexicano: Ciencias físicas y matemáticas, Vol. III]]></conf-name>
<conf-loc>D. F., México </conf-loc>
<page-range>218-37</page-range></nlm-citation>
</ref>
<ref id="B57">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Influence of acidity on growth and biochemistry of Pennisetum clandestinum]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sidari]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Panuccio]]></surname>
<given-names><![CDATA[M. R.]]></given-names>
</name>
<name>
<surname><![CDATA[Muscolo]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<source><![CDATA[Biol. Plant.]]></source>
<year>2004</year>
<volume>48</volume>
<page-range>133-6</page-range></nlm-citation>
</ref>
<ref id="B58">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Siebe]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[La erupción del volcán Xitle y las lavas del Pedregal hace 1670 ± 35 años AP y sus implicaciones]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Lot]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Cano-Santana]]></surname>
<given-names><![CDATA[Z.]]></given-names>
</name>
</person-group>
<source><![CDATA[Biodiversidad del ecosistema del Pedregal de San Ángel]]></source>
<year>2009</year>
<page-range>43-9</page-range><publisher-loc><![CDATA[México, D. F. ]]></publisher-loc>
<publisher-name><![CDATA[UNAM]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B59">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Ecología hipotética de la Reserva del Pedregal de San Ángel]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Soberón M.]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Rosas M.]]></surname>
<given-names><![CDATA[M. C.]]></given-names>
</name>
<name>
<surname><![CDATA[Jiménez C.]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
</person-group>
<source><![CDATA[Cienc. Des.]]></source>
<year>1991</year>
<volume>17</volume>
<page-range>25-38</page-range></nlm-citation>
</ref>
<ref id="B60">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sokal]]></surname>
<given-names><![CDATA[R. R.]]></given-names>
</name>
<name>
<surname><![CDATA[Rohlf]]></surname>
<given-names><![CDATA[F. J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Biometry: The principles and practice of statistics in biological research]]></source>
<year>1995</year>
<publisher-loc><![CDATA[New York, NY, USA ]]></publisher-loc>
<publisher-name><![CDATA[W. H. Freeman]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B61">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sparks]]></surname>
<given-names><![CDATA[D. L.]]></given-names>
</name>
</person-group>
<source><![CDATA[Environmental soil chemistry]]></source>
<year>2003</year>
<publisher-loc><![CDATA[London ]]></publisher-loc>
<publisher-name><![CDATA[Academic Press]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B62">
<nlm-citation citation-type="book">
<collab>StatSoft, Inc.</collab>
<source><![CDATA[Electronic Statistics Textbook]]></source>
<year>2008</year>
<publisher-loc><![CDATA[Tulsa. Oklahoma ]]></publisher-loc>
<publisher-name><![CDATA[StatSoft Corporation]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B63">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Organic matter and water-stable aggregates in soil]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Tisdall]]></surname>
<given-names><![CDATA[J. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Oades]]></surname>
<given-names><![CDATA[J. M.]]></given-names>
</name>
</person-group>
<source><![CDATA[J. Soil Sci.]]></source>
<year>1982</year>
<volume>33</volume>
<page-range>141-63</page-range></nlm-citation>
</ref>
<ref id="B64">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Troeh]]></surname>
<given-names><![CDATA[F. R.]]></given-names>
</name>
<name>
<surname><![CDATA[Thompson]]></surname>
<given-names><![CDATA[L. M.]]></given-names>
</name>
</person-group>
<source><![CDATA[Soils and soil fertility]]></source>
<year>2005</year>
<publisher-loc><![CDATA[New York, NY, USA ]]></publisher-loc>
<publisher-name><![CDATA[Wiley-Blackwell]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B65">
<nlm-citation citation-type="book">
<collab>USDA</collab>
<source><![CDATA[Soil taxonomy. A basic system of soil classif ication for making and interpreting soil surveys]]></source>
<year>1999</year>
<numero>436</numero>
<issue>436</issue>
<publisher-loc><![CDATA[Washington, DC, USA ]]></publisher-loc>
<publisher-name><![CDATA[USDA]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B66">
<nlm-citation citation-type="book">
<collab>USDA</collab>
<source><![CDATA[Predicting soil erosion by water: A guide to conservation planning in the revised universal soil loss equation]]></source>
<year>1997</year>
<numero>703</numero>
<issue>703</issue>
<publisher-loc><![CDATA[Washington, DC, USA ]]></publisher-loc>
<publisher-name><![CDATA[USDA]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B67">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[van Reeuwijk]]></surname>
<given-names><![CDATA[L. P.]]></given-names>
</name>
</person-group>
<source><![CDATA[Procedures for soil analysis]]></source>
<year>2006</year>
<publisher-loc><![CDATA[Wageningen, The Netherlands ]]></publisher-loc>
<publisher-name><![CDATA[ISRIC]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B68">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Relationships of soil microarthropod biomass with organic matter and pore size distribution in soils under different land use]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Vreeken-Buijs]]></surname>
<given-names><![CDATA[M. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Hassink]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Brussaard]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
</person-group>
<source><![CDATA[Soil Biol. Biochem]]></source>
<year>1998</year>
<volume>30</volume>
<page-range>97-106</page-range></nlm-citation>
</ref>
<ref id="B69">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Tubos de explosión en el Pedregal de San Ángel]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Waitz]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[Wittich]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
</person-group>
<source><![CDATA[Bol. Soc. Geol.]]></source>
<year>1911</year>
<volume>7</volume>
<page-range>169-75</page-range><publisher-loc><![CDATA[Mex ]]></publisher-loc>
</nlm-citation>
</ref>
<ref id="B70">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Methods of soil analysis]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Walkley]]></surname>
<given-names><![CDATA[M. S.]]></given-names>
</name>
<name>
<surname><![CDATA[Black]]></surname>
<given-names><![CDATA[C. A.]]></given-names>
</name>
</person-group>
<source><![CDATA[Soil Sci]]></source>
<year>1934</year>
<volume>37</volume>
<page-range>29-35</page-range></nlm-citation>
</ref>
<ref id="B71">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Volcanic ashes: Time markers in soil parent materials of the southern plains]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ward]]></surname>
<given-names><![CDATA[P. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Carter]]></surname>
<given-names><![CDATA[B. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Weaver]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
</person-group>
<source><![CDATA[Soil Sci. Soc. Am. J.]]></source>
<year>1993</year>
<volume>57</volume>
<page-range>453-60</page-range></nlm-citation>
</ref>
<ref id="B72">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Wittich]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<name>
<surname><![CDATA[Alzate]]></surname>
<given-names><![CDATA[Antonio]]></given-names>
</name>
</person-group>
<source><![CDATA[Los fenómenos microvolcánicos en el Pedregal de San Ángel]]></source>
<year>1919</year>
<volume>38</volume>
<page-range>101-5</page-range><publisher-name><![CDATA[Mem. Soc. Cient.]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B73">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Total synthesis of fulvic acid]]></article-title>
<person-group person-group-type="author">
<name>
<surname><![CDATA[Yamauchi]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Katayama]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Todoroki]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
<name>
<surname><![CDATA[Watanabe]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
</person-group>
<source><![CDATA[J. Chem. Soc. Chem. Commun]]></source>
<year>1984</year>
<volume>23</volume>
<page-range>1565-6</page-range></nlm-citation>
</ref>
<ref id="B74">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Young]]></surname>
<given-names><![CDATA[D. A.]]></given-names>
</name>
</person-group>
<source><![CDATA[Mind over magma the story of igneous petrology]]></source>
<year>2003</year>
<page-range>Princeton- USA</page-range><publisher-name><![CDATA[Princeton University Press]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B75">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Zar]]></surname>
<given-names><![CDATA[J. H.]]></given-names>
</name>
</person-group>
<source><![CDATA[Biostatistical analysis]]></source>
<year>2010</year>
<publisher-loc><![CDATA[Upper Saddle River, NJ, USA ]]></publisher-loc>
<publisher-name><![CDATA[Pearson Prentice-Hall]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B76">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Antonio-Garcés]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Restauración ecológica de la zona de amortiguamiento 8 de la Reserva Ecológica del Pedregal de San Ángel, D. F. (México)]]></source>
<year>2008</year>
<publisher-name><![CDATA[Facultad de Ciencias, Universidad Nacional Autónoma de México]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B77">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Castellanos-Vargas]]></surname>
<given-names><![CDATA[I.]]></given-names>
</name>
</person-group>
<source><![CDATA[Ecología de la oviposición de Sphenarium purpurascens (Orthoptera: Pyrgomorphidae) en la Reserva del Pedregal de San Ángel, México, D.F.]]></source>
<year>2001</year>
<publisher-name><![CDATA[Facultad de Ciencias, Universidad Nacional Autónoma de México]]></publisher-name>
</nlm-citation>
</ref>
</ref-list>
</back>
</article>
