<?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>0120-2812</journal-id>
<journal-title><![CDATA[Acta Agronómica]]></journal-title>
<abbrev-journal-title><![CDATA[Acta Agron.]]></abbrev-journal-title>
<issn>0120-2812</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional de Colombia]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0120-28122007000100013</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Actividad de fosfatasa ácida en suelos cultivados con papa y praderas del corregimiento de Catambuco, Pasto-Colombia]]></article-title>
<article-title xml:lang="en"><![CDATA[Acid Fostatase Activity in soils croping with potato and pastures from the Catambuco, Pasto, Colombia]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gálviz Ch]]></surname>
<given-names><![CDATA[Carmen L.]]></given-names>
</name>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Burbano O]]></surname>
<given-names><![CDATA[Hernán]]></given-names>
</name>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bonilla C]]></surname>
<given-names><![CDATA[Carmen]]></given-names>
</name>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Nariño Facultad de Ciencias Agrarias ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional de Colombia  ]]></institution>
<addr-line><![CDATA[Palmira Valle]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2007</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2007</year>
</pub-date>
<volume>56</volume>
<numero>1</numero>
<fpage>13</fpage>
<lpage>16</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0120-28122007000100013&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0120-28122007000100013&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0120-28122007000100013&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN Con el objetivo de estimar y comparar la actividad de la fostatasa ácida (AFA) en suelos sembrados con papa y con pastos, se realizó la presente investigación en suelos del corregimiento de Catambuco, municipio de Pasto, Colombia (2.820 msnm, 12.4oC). La mayor actividad de la fosfatasa ácida ocurrió en pradera en época de invierno; además se encontraron altas correlaciones entre AFA y el contenido de materia orgánica. Para los factores épocas de muestreo y uso del suelo hubo diferencias estadísticas altamente significativas y para suelos cubiertos con pradera y con uso reciente en el cultivo de papa. La AFA alcanzó el mayor porcentaje en suelos cubiertos con pradera, frente a los suelos cultivados con papa, para las dos épocas evaluadas.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[SUMMARY To estimated the acid phosphatase activity (APA) in soil covered with potato and prairie in Catambuco, place Pasto, Colombia; located to 2820 msnm and with average temperature of 12.4oC. The acid phosphatase activity obtained the biggest values in soil covered with prairie in winter time, in addition to that, there were high correlations between the APA and the organic matter off the soil. In the factors sampling times and use of the soil, there were significance statistical differences, with the most significance in soil covered with prairie and with recent use in potato cultivation. The APA obtained the biggest percentage in soil covered with prairie, in front of the soil cultivated with potato for the two evaluated times.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Actividad fosfatasa ácida]]></kwd>
<kwd lng="es"><![CDATA[uso del terreno]]></kwd>
<kwd lng="es"><![CDATA[Solanum tuberosum]]></kwd>
<kwd lng="en"><![CDATA[Acid phosphatase activity]]></kwd>
<kwd lng="en"><![CDATA[use of land]]></kwd>
<kwd lng="en"><![CDATA[Solanum tuberosum]]></kwd>
</kwd-group>
</article-meta>
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