<?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>2007-0934</journal-id>
<journal-title><![CDATA[Revista mexicana de ciencias agrícolas]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Mex. Cienc. Agríc]]></abbrev-journal-title>
<issn>2007-0934</issn>
<publisher>
<publisher-name><![CDATA[Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-09342017000400759</article-id>
<article-id pub-id-type="doi">10.29312/remexca.v8i4.5</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Efecto de las prácticas de agricultura de conservación en algunas propiedades químicas de los Vertisoles]]></article-title>
<article-title xml:lang="en"><![CDATA[Effect of conservation agriculture practices on some chemical properties of Vertisols]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Báez Pérez]]></surname>
<given-names><![CDATA[Aurelio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Limón Ortega]]></surname>
<given-names><![CDATA[Agustín]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[González Molina]]></surname>
<given-names><![CDATA[Lucila]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ramírez Barrientos]]></surname>
<given-names><![CDATA[César Eduardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bautista-Cruz]]></surname>
<given-names><![CDATA[Angélica]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,INIFAP Campo Experimental Bajío ]]></institution>
<addr-line><![CDATA[Celaya Guanajuato]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,INIFAP Campo Experimental Valle de México ]]></institution>
<addr-line><![CDATA[Texcoco Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Instituto Tecnológico del Valle de Morelia  ]]></institution>
<addr-line><![CDATA[Morelia Michoacán]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Instituto Politécnico Nacional CIIDIR ]]></institution>
<addr-line><![CDATA[Xoxocotlan Oaxaca]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>07</month>
<year>2017</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>07</month>
<year>2017</year>
</pub-date>
<volume>8</volume>
<numero>4</numero>
<fpage>759</fpage>
<lpage>772</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-09342017000400759&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-09342017000400759&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-09342017000400759&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El Bajío es una importante zona agrícola de México y entre sus suelos, los Vérticos tienen mayor potencial para la agricultura, pero el deterioro físico-químico ocasionado por las prácticas de agricultura intensiva ha repercutido en su fertilidad y la rentabilidad para la producción de granos. Las prácticas de agricultura de conservación (PAC) son una opción viable para revertir esta problemática. El objetivo de este estudio fue evaluar el pH, materia orgánica (MOS), tasa de acumulación de carbono orgánico (COS) y P-extratable Olsen en cinco Vertisoles: cuatro de Michoacán y uno de Guanajuato, con cuatro a ocho ciclos de cultivo continuos con PAC. Se evaluaron cinco prácticas agronómicas: (1) rotación gramínea-gramínea, todos los residuos de cosecha y uso de aguas negras; (2) rotación gramínea-leguminosas-gramínea, todos los residuos de cosecha y uso de aguas negras; (3) igual que 2, pero con agua de presa; (4) rotación gramínea-gramínea, 30% de residuos de cosecha y uso de agua de presa; y (5) rotación gramínea-gramínea, todos los residuos de cosecha y uso de agua de pozo. El pH fue alcalino antes de la implementación de las PAC, y disminuyó a ligeramente alcalino en función del tiempo de cultivo, principalmente en el estrato de 0-5 cm. La MOS aumentó entre 1.5 y 2%, después de ocho ciclos continuos con PAC. La tasa de acumulación de COS varió entre 1.5 y 7 t ha-1 año-1. La acumulación de P-Olsen mostró una baja correlación respecto al contenido de MOS (r= 0.44). La mayor concentración de P-Olsen se encontró en el estrato de 0-5 cm (hasta 47 ppm). Las PAC mejoraron las características químicas de los Vertisoles evaluados en este estudio.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract El Bajío is an important agricultural area of México and among its soils, the Vérticos have greater potential for agriculture, but the physical-chemical deterioration caused by intensive farming practices has had an impact on its fertility and profitability for grains production. Conservation agriculture practices (CAPs) are a viable option to reverse this problem. The objective of this paper was to evaluate pH, organic matter (MOS), organic carbon accumulation rate (COS), and P-extractable Olsen in five Vertisols: four from Michoacán and one from Guanajuato, with four to eight cycles of continuous cultivation with CAP. Five agronomic practices were evaluated: (1) grass-grass rotation, all crop residues and sewage use; (2) rotating grass-legume-grass, all crop residues and sewage use; (3) same as 2, but with dam water; (4) grass-grass rotation, 30% crop residues and use of dam water; and (5) grass-grass rotation, all crop residues and well water use. The pH was alkaline before the CAP implementation, and decreased to slightly alkaline as a function of the culture time, mainly in the stratum of 0-5 cm. The MOS increased between 1.5 and 2%, after eight continuous CAP cycles. The COS accumulation rate varied between 1.5 and 7 t ha-1 year-1. The accumulation of P-Olsen showed a low correlation with the MOS content (r= 0.44). The highest concentration of P-Olsen was found in the 0-5 cm stratum (up to 47 ppm). CAPs improved the chemical characteristics of the Vertisols evaluated in this study.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[agricultura de conservación]]></kwd>
<kwd lng="es"><![CDATA[carbono orgánico del suelo]]></kwd>
<kwd lng="en"><![CDATA[conservation agriculture]]></kwd>
<kwd lng="en"><![CDATA[soil organic carbon]]></kwd>
</kwd-group>
</article-meta>
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