<?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>S0120-28122019000400265</article-id>
<article-id pub-id-type="doi">10.15446/acag.v68n4.78564</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Efecto de enmiendas agrícolas en las reservas de carbono y nitrógeno en Oxisoles de la Amazonía del Brasil]]></article-title>
<article-title xml:lang="en"><![CDATA[Effect of agricultural correctives in the stocks of carbon and nitrogen of Oxisol in the brazilian amazon]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Amorim-Silva do Sacramento]]></surname>
<given-names><![CDATA[José Augusto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Silva-Gomes]]></surname>
<given-names><![CDATA[Paulo Henrique da]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Costa-Veloso]]></surname>
<given-names><![CDATA[Carlos Alberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Silva3]]></surname>
<given-names><![CDATA[Arystides Resende]]></given-names>
</name>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Dantas]]></surname>
<given-names><![CDATA[Edilandia Farias]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Villacis-Fajardo]]></surname>
<given-names><![CDATA[Juan Daniel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidade Federal do Oeste do Pará Instituto de Biodiversidade e Florestas ]]></institution>
<addr-line><![CDATA[Santarém Pará]]></addr-line>
<country>Brazil</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Secretaria de Agricultura de Óbidos Prefeitura de Óbidos ]]></institution>
<addr-line><![CDATA[ Pará]]></addr-line>
<country>Brasil</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Embrapa Amazonia Oriental Centro de Pesquisa Agropecuário do Trópico Úmido ]]></institution>
<addr-line><![CDATA[Belém Pará]]></addr-line>
<country>Brazil</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Universidade Federal de Pernambuco Departamento de Energia Nuclear ]]></institution>
<addr-line><![CDATA[Recife Pernambuco]]></addr-line>
<country>Brazil</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Universidade Estadual do Amapá  ]]></institution>
<addr-line><![CDATA[Macapá Amapá]]></addr-line>
<country>Brasil</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2019</year>
</pub-date>
<volume>68</volume>
<numero>4</numero>
<fpage>265</fpage>
<lpage>270</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0120-28122019000400265&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0120-28122019000400265&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0120-28122019000400265&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen En un Oxisol Distrófico de textura arcillosa del campo experimental de la Empresa Brasileña de Producción Agropecuaria (Embrapa) en la ciudad de Belterra, estado de Pará (Brasil) se evalúo el efecto de los correctivos agrícolas (cal dolomita y yeso) en las reservas de carbono y nitrógeno en el suelo. Las muestras de suelo fueron tomadas en pequeñas calicatas de 0.60 x 0.60 x 0.60 en tres repeticiones y un diseño en bloques al azar con cinco tratamientos (cal/yeso -kg/ha) en sistemas agrícolas durante 5 años en rotación de maíz/soya bajo siembra directa (SSD). Los tratamientos (T), cal (GO)/yeso (GO), fueron: T1 (C0G0) = sin cal/sin yeso, T2 (C1G1) = 1000/500, T3 (C4G2) = 4000/1000, T4 (C4G2) = (4000/1000), más un testigo en bosque nativo (BNA) sin enmiendas. Las muestras fueron tomadas de 0 - 5; 5 - 10; 10 - 20; 20 - 40 e 40 - 60 cm de profundidad en el suelo. Los resultados mostraron que la aplicación de yeso más cal en sistema de siembra directa de cultivos comerciales maíz/soya aumenta la disponibilidad de nutrientes en las capas superiores del suelo hasta 20 cm de profundidad. Los mejores resultados en el perfil del suelo se obtuvieron con el tratamiento C4G2.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract In a clay-colored dystrophic Oxisol from the experimental field of the Brazilian Agricultural Production Company (EMBRAPA) in the city of Belterra, State of Para, the effect of the agricultural corrective measures (cal dolomitay and gypsum) on the carbon and nitrogen reserves was evaluated. ground. The soil samples were taken in small pits of 0.60 x 0.60 x 0.60 in three replications and a random block design with three replications and five treatments (lime / gypsum -kg / ha) in agricultural systems under direct seeding (SSD): Treatment 1 (C0G0) = no lime / no gypsum, Treatment 2 (C1G1) = 1000/500), Treatment 3 (C4G2) = 4000/1000), Treatment 4 (C4G2) = (4000/1000) plus a witness in forest Native (BNA) without amendments. The soil samples were taken every 10 cm up to 60 cm deep. The results showed that the application of gypsum and lime in the direct seeding system of commercial crops increases the availability of nutrients in the upper layers of the soil up to 20 cm deep. The best results in the soil profile were obtained with the C4G2 treatment.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Siembra directa]]></kwd>
<kwd lng="es"><![CDATA[bosque nativo]]></kwd>
<kwd lng="es"><![CDATA[atributos físicos y químicos]]></kwd>
<kwd lng="en"><![CDATA[No tillage]]></kwd>
<kwd lng="en"><![CDATA[native forest]]></kwd>
<kwd lng="en"><![CDATA[physical and chemical characteristics]]></kwd>
</kwd-group>
</article-meta>
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