<?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>0120-0135</journal-id>
<journal-title><![CDATA[Revista de Ciencias Agrícolas]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Cienc. Agr.]]></abbrev-journal-title>
<issn>0120-0135</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Nariño]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0120-01352020000100070</article-id>
<article-id pub-id-type="doi">10.22267/rcia.203701.128</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Physical properties of soil in the early stage of an agroforestry system in the High Andean zone]]></article-title>
<article-title xml:lang="es"><![CDATA[Propiedades físicas del suelo en la etapa de establecimiento de un sistema agroforestal en la zona Alto Andina]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Muñoz-Rodríguez]]></surname>
<given-names><![CDATA[M-Alonso]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Delgado-Vargas]]></surname>
<given-names><![CDATA[Iván A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Guerrero J.]]></surname>
<given-names><![CDATA[Jennyfer Cristina]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Andrade B.]]></surname>
<given-names><![CDATA[Anyi Valeria]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Nariño  ]]></institution>
<addr-line><![CDATA[Pasto ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Nariño  ]]></institution>
<addr-line><![CDATA[Pasto ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad de Nariño  ]]></institution>
<addr-line><![CDATA[Pasto ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad de Nariño  ]]></institution>
<addr-line><![CDATA[Pasto ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2020</year>
</pub-date>
<volume>37</volume>
<numero>1</numero>
<fpage>70</fpage>
<lpage>79</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0120-01352020000100070&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0120-01352020000100070&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0120-01352020000100070&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT In Nariño, Colombia, land use has generated some problems such as erosion, compaction, lack of fertility, among others, so it is necessary to search for alternatives to mitigate these impacts. The objective of this study was to evaluate some physical properties of the soil in an agroforest system with Morella pubescens (Humb. &amp; Bonpl. ex Willd.) Wilbur with Smallanthus sonchifolius (Poepp.) H.Rob, in the experimental farm of Botana, in the city of Pasto, Nariño, where the bulk density, real density, total porosity, structural stability properties and distribution of aggregates were analyzed. The datas were obtained in two phases: f1 and f2 before and after agroforestry system implementation, respectively. A randomized complete block design with three treatments and three replications were used. The treatments corresponded to plant densities, T1: S sonchifoliuos, sowed to 1x1m, T2:0.8x0.8m y T3:0.5x0.5m, with three replications. M pusescens was stablished to 4x4m between plants and 9 m between rows and the control (f1). The statistics have differences between f1 (control) and f2 (treatments), to the structural stability properties and distribution of aggregates. The ground suffered a structural stability change to stable lightly (0.97 D.P.M) in f1 to a stable moderate (2.53 D.P.M), in f2. The distribution of aggregates passed to 60% in f1 to 70.3% in f2, with a media aggregation status. The different agroforest systems management could help, in the long term, by improving the structure of the ground through the vegetal material of arboreal component, the application of a minimum farming and the addition of organic matter.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN En Nariño, Colombia, el cambio de uso del suelo ha generado problemas de erosión, compactación, pérdida de la capa fértil del suelo, entre otros, siendo necesario buscar alternativas que minimicen estos impactos. El estudio se realizó con el objetivo de evaluar algunas de las propiedades físicas del suelo en un sistema agroforestal con Morella pubescens (Humb. &amp; Bonpl. ex Willd.) Wilbur, en asocio con Smallanthus sonchifolius Poepp.) H.Rob, en la Granja Experimental Botana, municipio de Pasto, donde se analizó la densidad aparente, densidad real, porosidad total, distribución de agregados y estabilidad estructural del suelo. Los datos se obtuvieron en dos fases; fase 1 (f1) y fase 2 (f2) antes y después de la implementación del sistema agroforestal, respectivamente. Se utilizó un diseño de bloques completos al azar con tres tratamientos y tres repeticiones. Los tratamientos correspondieron a densidades de siembra T1: S. sonchifolius sembrado a 1x1m, T2:0.8x0.8m y T3:0.5x0.5m. M. pubescens fue establecido a 4 x 4m entre plántulas y a 9m entre líneas de M. pubescens y el testigo. Se presentaron diferencias estadísticas significativas entre f1 (testigo) y f2 (tratamientos), para las propiedades estabilidad estructural y distribución de agregados. El suelo sufrió un cambio en la estabilidad estructural pasando de ligeramente estable (0.97 D.P.M) en f1 a moderadamente estable (2.53 D.P.M), en f2. La distribución de agregados pasó de un 60% en f1 a un 70.3% en la f2. El manejo de sistemas agroforestales puede contribuir a mediano y largo plazo en la mejora de la estructura del suelo mediante la incorporación del material vegetal del componente arbóreo, la aplicación de una labranza mínima y la adición de materia orgánica.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[apparent density]]></kwd>
<kwd lng="en"><![CDATA[aggregate distribution]]></kwd>
<kwd lng="en"><![CDATA[structural stability]]></kwd>
<kwd lng="en"><![CDATA[Morella pubescens]]></kwd>
<kwd lng="en"><![CDATA[Smallanthus sonchifolius]]></kwd>
<kwd lng="es"><![CDATA[Densidad aparente]]></kwd>
<kwd lng="es"><![CDATA[distribución de agregados]]></kwd>
<kwd lng="es"><![CDATA[estabilidad estructural]]></kwd>
<kwd lng="es"><![CDATA[Morella pubescens]]></kwd>
<kwd lng="es"><![CDATA[Smallanthus sonchifolius.]]></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[Alvarado]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
<name>
<surname><![CDATA[López]]></surname>
<given-names><![CDATA[V.]]></given-names>
</name>
<name>
<surname><![CDATA[Castillo]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Pérdida de suelo por erosión hídrica en diferentes sistemas de producción con papa Solanum tuberosum L]]></article-title>
<source><![CDATA[Revista de Ciencias Agrícolas]]></source>
<year>2011</year>
<volume>28</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>64-72</page-range></nlm-citation>
</ref>
<ref id="B2">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Benavides]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<name>
<surname><![CDATA[Morales]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
<name>
<surname><![CDATA[Navia]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Propiedades físicas y contenido de materia orgánica en diferentes usos del suelo en Samaniego, Colombia]]></article-title>
<source><![CDATA[Revista Agroforestería Neotropical]]></source>
<year>2015</year>
<volume>5</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>27-41</page-range></nlm-citation>
</ref>
<ref id="B3">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bouyoucos]]></surname>
<given-names><![CDATA[G.S.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Directions for making mechanical analysis of soil by hydrometer method]]></article-title>
<source><![CDATA[Soil Science]]></source>
<year>1936</year>
<volume>42</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>225-8</page-range></nlm-citation>
</ref>
<ref id="B4">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Burbano]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[El suelo y su relación con los servicios ecosistémicos y la seguridad alimentaria]]></article-title>
<source><![CDATA[Revista de Ciencias Agrícolas]]></source>
<year>2016</year>
<volume>33</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>117-24</page-range></nlm-citation>
</ref>
<ref id="B5">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Buenaver]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Rodríguez]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Determinación de la estabilidad de agregados del suelo en diferentes agroescosistemas del Departamento de Norte de Santander]]></article-title>
<source><![CDATA[Suelos ecuatoriales, Sociedad Colombiana de la Ciencia del Suelo]]></source>
<year>2016</year>
<volume>46</volume>
<numero>1 y 2</numero>
<issue>1 y 2</issue>
<page-range>42-50</page-range></nlm-citation>
</ref>
<ref id="B6">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bronick]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Lal]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Soil structure and management: areview]]></article-title>
<source><![CDATA[Geoderma]]></source>
<year>2005</year>
<volume>124</volume>
<numero>1 y 2</numero>
<issue>1 y 2</issue>
<page-range>3-22</page-range></nlm-citation>
</ref>
<ref id="B7">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Calderón]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Fandiño]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[Chávez]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
</person-group>
<source><![CDATA[El Yacón: una alternativa para el sector agrícola colombiano]]></source>
<year>2017</year>
<page-range>77</page-range><publisher-loc><![CDATA[Colombia, Bogotá ]]></publisher-loc>
<publisher-name><![CDATA[Universidad de la Salle]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B8">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Chaves]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Delgado]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Manual de Prácticas de Laboratorio Suelos Generales]]></source>
<year>2015</year>
<page-range>173</page-range><publisher-loc><![CDATA[Pasto ]]></publisher-loc>
<publisher-name><![CDATA[Editorial Universitaria-Universidad de Nariño]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B9">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Cherubin]]></surname>
<given-names><![CDATA[M.R.]]></given-names>
</name>
<name>
<surname><![CDATA[Chavarro-Bermeo]]></surname>
<given-names><![CDATA[J.P.]]></given-names>
</name>
<name>
<surname><![CDATA[Silva-Olaya]]></surname>
<given-names><![CDATA[A. M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Agroforestry systems improve soil physical quality in northwestern Colombian Amazon]]></article-title>
<source><![CDATA[Agroforestry Systems]]></source>
<year>2019</year>
<volume>93</volume>
<numero>5</numero>
<issue>5</issue>
<page-range>1741-53</page-range></nlm-citation>
</ref>
<ref id="B10">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Di rienzo]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Casanoves]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
<name>
<surname><![CDATA[Balzarini]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[González]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
<name>
<surname><![CDATA[Tablada]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Robledo]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
</person-group>
<source><![CDATA[Infostat versión. Grupo Infostat]]></source>
<year>2010</year>
</nlm-citation>
</ref>
<ref id="B11">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gaspar]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
<name>
<surname><![CDATA[Navas]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Vertical and lateral distributions of 137Cs in cultivated and uncultivated soils on Mediterranean hillslopes]]></article-title>
<source><![CDATA[Journal Geoderma]]></source>
<year>2013</year>
<page-range>207-8</page-range></nlm-citation>
</ref>
<ref id="B12">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gaviria]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
<name>
<surname><![CDATA[Herrera]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
</person-group>
<source><![CDATA[Propiedades físicas del Suelo en el Arreglo Agroforestal Laurel de Cera Morella pubescens H.B.K con Choco Lupinus mutabilis L. en el Municipio de Pasto]]></source>
<year>2013</year>
<page-range>28</page-range><publisher-loc><![CDATA[Colombia, Pasto ]]></publisher-loc>
<publisher-name><![CDATA[Universidad de Nariño]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B13">
<nlm-citation citation-type="book">
<collab>IGAC</collab>
<source><![CDATA[Estudio general de suelos del Nororiente del Departamento de Nariño]]></source>
<year>1986</year>
<page-range>558</page-range><publisher-loc><![CDATA[Bogotá ]]></publisher-loc>
<publisher-name><![CDATA[IGAC]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B14">
<nlm-citation citation-type="book">
<collab>IGAC</collab>
<source><![CDATA[Métodos Analíticos de Laboratorio de Suelos]]></source>
<year>1990</year>
<page-range>502</page-range><publisher-loc><![CDATA[Bogotá ]]></publisher-loc>
<publisher-name><![CDATA[IGAC]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B15">
<nlm-citation citation-type="book">
<collab>IGAC</collab>
<source><![CDATA[Estudio general de los suelos y zonificación de tierras del departamento de Nariño]]></source>
<year>2004</year>
<publisher-loc><![CDATA[Colombia, Bogotá ]]></publisher-loc>
<publisher-name><![CDATA[IGAC]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B16">
<nlm-citation citation-type="book">
<collab>IGAC</collab>
<source><![CDATA[Métodos Analíticos de Laboratorios de Suelos]]></source>
<year>2006</year>
<page-range>674</page-range><publisher-loc><![CDATA[Colombia, Bogotá ]]></publisher-loc>
<publisher-name><![CDATA[Imprenta Nacional de Colombia]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B17">
<nlm-citation citation-type="book">
<collab>IDEAM</collab>
<source><![CDATA[Reporte Técnico Estación Meteorológica Botana]]></source>
<year>2010</year>
<page-range>1</page-range><publisher-loc><![CDATA[Pasto, Nariño ]]></publisher-loc>
<publisher-name><![CDATA[IDEAM]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B18">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Lal]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Shukla]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<source><![CDATA[Principles of Soil Physics]]></source>
<year>2004</year>
<publisher-loc><![CDATA[Marcel Dekker, New York ]]></publisher-loc>
<publisher-name><![CDATA[CRC Press]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B19">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Leyva]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Baldoquin]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Reyes]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Propiedades de los suelos en diferentes usos agropecuarios, Las Tunas, Cuba]]></article-title>
<source><![CDATA[Revista de Ciencias Agrícolas]]></source>
<year>2018</year>
<volume>35</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>36-47</page-range></nlm-citation>
</ref>
<ref id="B20">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Martínez]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<name>
<surname><![CDATA[Fuentes]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Acevedo]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Carbono orgánico y propiedades del suelo]]></article-title>
<source><![CDATA[Revista de la ciencia del suelo y nutrición vegetal]]></source>
<year>2008</year>
<volume>8</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>68-96</page-range></nlm-citation>
</ref>
<ref id="B21">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Méndez]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[Becerra]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
<name>
<surname><![CDATA[Hernández]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
<name>
<surname><![CDATA[Diaz]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Muñoz]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Incidencia de la mecanización del suelo en el crecimiento vegetativo de papaya (Carica papaya L.)]]></article-title>
<source><![CDATA[Revista de Ciencias Agrícolas]]></source>
<year>2016</year>
<volume>33</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>53-63</page-range></nlm-citation>
</ref>
<ref id="B22">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Molina]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[Moreno]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<source><![CDATA[Evaluación de propiedades físico-químicas en diferentes usos y manejos de suelo, región altoandina de Pasto]]></source>
<year>2017</year>
<page-range>36</page-range><publisher-loc><![CDATA[Pasto ]]></publisher-loc>
<publisher-name><![CDATA[Universidad de Nariño]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B23">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Molina]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Narváez]]></surname>
<given-names><![CDATA[W.]]></given-names>
</name>
<name>
<surname><![CDATA[Muñoz]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Sistema agroforestal laurel de cera Myrica pubescens H.B.K, intercalado con cultivos transitorios en el municipio de Pasto. Botana.]]></article-title>
<source><![CDATA[Revista de Ciencias Agrícolas]]></source>
<year>2000</year>
<volume>17</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>166-75</page-range></nlm-citation>
</ref>
<ref id="B24">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Morales]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
</person-group>
<source><![CDATA[Utilización de árboles fijadores de nitrógeno Escallonia pendula y Alnus acuminata para la recuperación de suelos erosionados]]></source>
<year>2018</year>
<page-range>84</page-range><publisher-loc><![CDATA[Colombia ]]></publisher-loc>
<publisher-name><![CDATA[Universidad Nacional Abierta y A distancia - UNAD]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B25">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Nieto]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Ramos Veintimilla]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Galarza Rosales]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Sistemas agroforestales aplicables en la Sierra ecuatoriana. Resultados de una década de experiencias de campo]]></source>
<year>2004</year>
<page-range>195</page-range><publisher-loc><![CDATA[Ecuador, Quito ]]></publisher-loc>
<publisher-name><![CDATA[Instituto Nacional Autónomo de Investigaciones Agropecuarias - INIAP]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B26">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Novillo]]></surname>
<given-names><![CDATA[I.]]></given-names>
</name>
<name>
<surname><![CDATA[Carrillo]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Cargua]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Moreira]]></surname>
<given-names><![CDATA[V.]]></given-names>
</name>
<name>
<surname><![CDATA[Albán]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
<name>
<surname><![CDATA[Morales]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Propiedades físicas del suelo en diferentes sistemas agrícolas en la provincia de Los Ríos, Ecuador]]></article-title>
<source><![CDATA[Revista Temas Agrarios]]></source>
<year>2017</year>
<volume>23</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>177-87</page-range></nlm-citation>
</ref>
<ref id="B27">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ramírez]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Vélez]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Evaluación preliminar del arreglo agroforestal en líneas de Laurel de cera Myrica pubescens con Papa Solanum tuberosum y Ajo Allium sativum en la vereda Botana]]></source>
<year>2002</year>
<page-range>17</page-range><publisher-loc><![CDATA[Colombia, San Juan de Pasto ]]></publisher-loc>
<publisher-name><![CDATA[Universidad de Nariño]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B28">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rojas]]></surname>
<given-names><![CDATA[W.]]></given-names>
</name>
<name>
<surname><![CDATA[Parra]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Implementación de un modelo de cultivo de yacón (Smallanthus sonchifolius) para el aprovechamiento medicinal y alimenticio-vereda Julumito, municipio de Popayán, departamento del Cauca]]></source>
<year>2018</year>
<page-range>106</page-range><publisher-loc><![CDATA[Popayán, Colombia ]]></publisher-loc>
<publisher-name><![CDATA[Universidad Nacional Abierta y A distancia - UNAD]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B29">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sáenz]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Hay mucho que investigar en las raíces y tubérculos andinos]]></article-title>
<source><![CDATA[Revista de Medicina Veterinaria]]></source>
<year>2019</year>
<volume>38</volume>
<page-range>7-13</page-range></nlm-citation>
</ref>
<ref id="B30">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Six]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Bossuyt]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Denef]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A history of research on the link between (micro) aggregates, soil biota, and soil organic matter dynamics]]></article-title>
<source><![CDATA[Soil &amp; Tillage Research]]></source>
<year>2004</year>
<volume>79</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>7-31</page-range></nlm-citation>
</ref>
<ref id="B31">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Unigarro]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Carreño]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<source><![CDATA[Métodos químicos y físicos para el análisis de suelos]]></source>
<year>2005</year>
<page-range>72</page-range><publisher-loc><![CDATA[San Juan de Pasto ]]></publisher-loc>
<publisher-name><![CDATA[Universidad de Nariño]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B32">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Urbano]]></surname>
<given-names><![CDATA[M. F.]]></given-names>
</name>
<name>
<surname><![CDATA[Pantoja]]></surname>
<given-names><![CDATA[M. F.]]></given-names>
</name>
<name>
<surname><![CDATA[Delgado]]></surname>
<given-names><![CDATA[I. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Cabrera]]></surname>
<given-names><![CDATA[P. C.]]></given-names>
</name>
<name>
<surname><![CDATA[Benavides]]></surname>
<given-names><![CDATA[I. F.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The effect of green fertilizers on the ecological structure of soil invertebrate communities in an andisol of Southwestern Colombia]]></article-title>
<source><![CDATA[Revista de Biología Tropical]]></source>
<year>2019</year>
<volume>67</volume>
<numero>6</numero>
<issue>6</issue>
<page-range>1394-405</page-range></nlm-citation>
</ref>
<ref id="B33">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Volverás]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
<name>
<surname><![CDATA[Amézquita]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<name>
<surname><![CDATA[Campo]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Indicadores de calidad física del suelo de la zona cerealera andina del departamento de Nariño, Colombia]]></source>
<year>2016</year>
<volume>17</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>361-77</page-range><publisher-loc><![CDATA[Pasto ]]></publisher-loc>
<publisher-name><![CDATA[Corpoica Ciencia Tecnología Agropecuaria]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B34">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Whalen]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Chang]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Macroaggregate Charatacteristics in soils alter 25 annual manure applications]]></article-title>
<source><![CDATA[Soil Science Society of America]]></source>
<year>2002</year>
<volume>66</volume>
<page-range>1617-47</page-range></nlm-citation>
</ref>
<ref id="B35">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Yoder]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A direct method of agregate analysis of soil and study of physical nature of erosion losses]]></article-title>
<source><![CDATA[J. Am Soc. Agron]]></source>
<year>1936</year>
<volume>28</volume>
<numero>5</numero>
<issue>5</issue>
<page-range>337-51</page-range></nlm-citation>
</ref>
<ref id="B36">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Zuñiga]]></surname>
<given-names><![CDATA[O]]></given-names>
</name>
<name>
<surname><![CDATA[Osorio]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Cuero]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Peña]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Evaluación de tecnologías para la recuperación de suelos degradados por Salinidad]]></article-title>
<source><![CDATA[Rev.Fac.Nal.Agr.Medellín]]></source>
<year>2011</year>
<volume>64</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>5769-79</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
