<?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>S0120-01352022000100085</article-id>
<article-id pub-id-type="doi">10.22267/rcia.223901.171</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Geostatistical methods applied to soil fertility zoning]]></article-title>
<article-title xml:lang="es"><![CDATA[Métodos geo estadísticos aplicados a la zonificación de la fertilidad del suelo]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Albornoz-Bucheli]]></surname>
<given-names><![CDATA[Cesar]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Benavides-Cardona]]></surname>
<given-names><![CDATA[Carlos]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Muñoz-Guerrero]]></surname>
<given-names><![CDATA[Diego]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Nariño  ]]></institution>
<addr-line><![CDATA[ Nariño]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Nariño  ]]></institution>
<addr-line><![CDATA[ Nariño]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad de Nariño  ]]></institution>
<addr-line><![CDATA[ Nariño]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2022</year>
</pub-date>
<volume>39</volume>
<numero>1</numero>
<fpage>85</fpage>
<lpage>98</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0120-01352022000100085&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0120-01352022000100085&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0120-01352022000100085&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT In conventional agricultural production systems, soil management is generally carried out without considering the spatial variability of its properties. This situation generates not only soil degradation but also an increase in production costs associated with the management of this factor. The objective of this research was to evaluate, through geostatistical methods, the spatial variability of soil fertility in Botana Experimental Farm of Universidad de Nariño. Spatial variability maps were estimated using the ArcGIS 10 program, the Kriging interpolation method, and the optimal ranges of soil fertility for the Andean region as projection parameters for making decisions related to land use. The fertility zoning of the farm was established, classifying soil as having high, medium, and low fertility. Most of the experimental farm had low fertility soils (20.7ha), and only 3ha had good conditions. Statistical analysis indicated a high variability in soil chemical properties. Properties such as pH and bulk density showed low variability.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN En sistemas de producción agrícola convencional, generalmente el manejo de suelos se realiza sin considerar la variabilidad espacial de sus propiedades. Esta situación genera no solo degradación del mismo, sino también incremento en los costos de producción asociados al manejo de este factor. El objetivo de la presente investigación fue evaluar a través de métodos geo estadísticos la variabilidad espacial de la fertilidad de suelos en un área de uso agropecuario (Granja experimental Botana, Universidad de Nariño). Se realizó la estimación de mapas de variabilidad espacial, empleando el programa ArcGIS 10 y el método de interpolación Kriging, teniendo en cuenta los rangos óptimos de fertilidad de los suelos para la región andina como parámetros de proyección en la toma de decisiones relacionadas al uso del suelo en el área estudiada. Se estableció la zonificación de la fertilidad de los suelos seleccionados de la granja, clasificándolos en: suelos de fertilidad alta, media y baja. La mayor parte de la finca experimental presentó suelos de baja fertilidad (20,7ha) y solo 3ha, buenas condiciones al respecto. El análisis estadístico indicó una alta variabilidad en las propiedades químicas del suelo. Las propiedades como el pH y la densidad aparente mostraron una baja variabilidad.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[spatial variability]]></kwd>
<kwd lng="en"><![CDATA[soil physics]]></kwd>
<kwd lng="en"><![CDATA[interpolation]]></kwd>
<kwd lng="en"><![CDATA[soil analysis]]></kwd>
<kwd lng="en"><![CDATA[precision agriculture]]></kwd>
<kwd lng="es"><![CDATA[variabilidad espacial]]></kwd>
<kwd lng="es"><![CDATA[física del suelo]]></kwd>
<kwd lng="es"><![CDATA[interpolación]]></kwd>
<kwd lng="es"><![CDATA[análisis de suelo]]></kwd>
<kwd lng="es"><![CDATA[agricultura de precisión]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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