<?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>1390-8596</journal-id>
<journal-title><![CDATA[LA GRANJA. Revista de Ciencias de la Vida ]]></journal-title>
<abbrev-journal-title><![CDATA[La Granja]]></abbrev-journal-title>
<issn>1390-8596</issn>
<publisher>
<publisher-name><![CDATA[Universidad Politécnica Salesiana]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1390-85962018000200043</article-id>
<article-id pub-id-type="doi">10.17163/lgr.n28.2018.03</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[VARIACIONES ALTITUDINALES EN IONES DE H Y AL EN EL CONTENIDO DE FE EN SUELOS DE LA SELVA AMAZÓNICA]]></article-title>
<article-title xml:lang="en"><![CDATA[ALTITUDINAL VARIATIONS IN H AND AL IONS INTERCHANGE ALONG WITH FE CONTENT IN AMAZONIAN RAINFOREST SOIL]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Singla]]></surname>
<given-names><![CDATA[Ankit]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bautista]]></surname>
<given-names><![CDATA[Gabriela]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Mátyás]]></surname>
<given-names><![CDATA[Bence]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Serrano]]></surname>
<given-names><![CDATA[Vanessa]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Morales Arteaga]]></surname>
<given-names><![CDATA[Juan]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sánchez]]></surname>
<given-names><![CDATA[Renato Gabriel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bracho Velásquez]]></surname>
<given-names><![CDATA[Rubén Darío]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ramírez-Cando]]></surname>
<given-names><![CDATA[Lenin J.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Ministerio de Agricultura & Asistencia del Productor  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>India</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Investigador independiente  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Ecuador</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Politécnica Salesiana  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Ecuador</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidad Politécnica Salesiana  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Ecuador</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Universidad Politécnica Salesiana  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Ecuador</country>
</aff>
<aff id="Af6">
<institution><![CDATA[,Investigador independiente  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Ecuador</country>
</aff>
<aff id="Af7">
<institution><![CDATA[,Universidad Politécnica Salesiana  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Ecuador</country>
</aff>
<aff id="Af8">
<institution><![CDATA[,Universidad Politécnica Salesiana  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Ecuador</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>02</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>02</month>
<year>2018</year>
</pub-date>
<volume>28</volume>
<numero>2</numero>
<fpage>43</fpage>
<lpage>51</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.senescyt.gob.ec/scielo.php?script=sci_arttext&amp;pid=S1390-85962018000200043&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.senescyt.gob.ec/scielo.php?script=sci_abstract&amp;pid=S1390-85962018000200043&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.senescyt.gob.ec/scielo.php?script=sci_pdf&amp;pid=S1390-85962018000200043&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Los suelos varían ampliamente en la Amazonia mostrando gran diversidad, diferentes características morfológicas y propiedades físico-químicas del suelo. Las investigaciones llevadas a cabo en relación a las propiedades del suelo en estas áreas ayudan al conocimiento general de los suelos nativos e inexplorados y proporcionan muestras de control para el estudio del suelo. En la literatura existen importantes investigaciones que estudian los bosques amazónicos en un entorno heterogéneo en relación con el suelo y la topografía. En el estudio actual se recolectaron muestras de suelo de 3 profundidades, 9 localidades y altitudes diferentes en la selva amazónica; y proporciona la visión sobre los efectos de la profundidad del suelo así como las variaciones altitudinales sobre el contenido de Fe y la acidez intercambiable (intercambio iónico H-al). Los resultados indicaron que la altitud, en comparación con la profundidad del suelo, puede desempeńar un papel importante en el contenido de Fe y la acidez intercambiable.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Soils vary broadly across Amazonia having a large diversity of soil types, morphological characteristics and physical- chemical soil properties. Research that examines the soil properties of these areas improve the general knowledge of native, unexplored soils and provides promising control samples for soil science. There are important investigations in the literature that examine the Amazonian forests grow in a heterogeneous environment in relation to soil and topography. In this study soil samples of 3 depths and from 9 different altitudinal locations of Amazonian rainforest were collected. The present study provides the insight about the effects of soil depth as well as altitudinal variations on Fe content and interchangeable acidity (H-Al ion interchange). This study indicated that altitude compared to soil depth can play major role in Fe content and Interchangeable acidity.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Selva tropical]]></kwd>
<kwd lng="es"><![CDATA[control del suelo]]></kwd>
<kwd lng="es"><![CDATA[suelo Amazónico]]></kwd>
<kwd lng="es"><![CDATA[variación altitudinal]]></kwd>
<kwd lng="es"><![CDATA[ion de H]]></kwd>
<kwd lng="es"><![CDATA[ion del Al]]></kwd>
<kwd lng="es"><![CDATA[contenido de Fe]]></kwd>
<kwd lng="en"><![CDATA[Rainforest]]></kwd>
<kwd lng="en"><![CDATA[Control soil]]></kwd>
<kwd lng="en"><![CDATA[Amazonian soil]]></kwd>
<kwd lng="en"><![CDATA[Altitudinal variation]]></kwd>
<kwd lng="en"><![CDATA[H ion]]></kwd>
<kwd lng="en"><![CDATA[Al ion]]></kwd>
<kwd lng="en"><![CDATA[Fe content]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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