<?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>2007-4026</journal-id>
<journal-title><![CDATA[Ingeniería agrícola y biosistemas]]></journal-title>
<abbrev-journal-title><![CDATA[Ing. agric. biosist.]]></abbrev-journal-title>
<issn>2007-4026</issn>
<publisher>
<publisher-name><![CDATA[Universidad Autónoma Chapingo]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-40262019000200097</article-id>
<article-id pub-id-type="doi">10.5154/r.inagbi.2017.11.017</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Nutrient balance in maize cropping systems and challenges for their sustainability]]></article-title>
<article-title xml:lang="es"><![CDATA[Balance de nutrientes en sistemas de cultivo de maíz y retos para su sustentabilidad]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Flores-Sánchez]]></surname>
<given-names><![CDATA[Diego]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Navarro-Garza]]></surname>
<given-names><![CDATA[Hermilio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pérez-Olvera]]></surname>
<given-names><![CDATA[María Antonia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Colegio de Postgraduados  ]]></institution>
<addr-line><![CDATA[ Estado de México]]></addr-line>
<country>Mexico</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>11</volume>
<numero>2</numero>
<fpage>97</fpage>
<lpage>109</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-40262019000200097&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-40262019000200097&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-40262019000200097&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract  Introduction: Nutrition management in the maize crop in Guanajuato, Mexico, is based on mineral fertilization, with high doses of nitrogen and reduced application of phosphorus and potassium.  Objective: To diagnose the management of mineral nutrition and residues from the maize cropping system, and identify opportunities for their efficient use.  Methodology: 68 maize farmers from the municipalities of Salvatierra and Valle de Santiago, Guanajuato, were surveyed. Plot soils were sampled, and yield, nutrient concentration and C mineralization were estimated. With the data obtained, graphs of the balance of N, P, K and C were made.  Results: Nutrition management and biomass production varied among farmers. Currently, P and K are not limiting factors, unlike N, since the soil only contributes 11 % of the total available nitrogen. Residue management showed that there is an imbalance between soil C mineralization and the incorporation of residues.  Study limitations: The analysis focused on only one agricultural cycle.  Originality: The focus of the study, including the graphical analysis, is scarcely applied in the region&#8217;s maize farming systems.  Conclusions: An integral vision is required for the management of organo-mineral nutrition and residues to contribute to their efficient and sustainable use.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen  Introducción:  El manejo de la nutrición en el cultivo de maíz en Guanajuato, México, se basa en la fertilización mineral, con altas dosis de nitrógeno, y reducida aplicación de fósforo y potasio.  Objetivo:  Diagnosticar el manejo de la nutrición mineral y de residuos del sistema de cultivo de maíz, e identificar oportunidades para su uso eficiente.  Metodología:  Se encuestaron 68 agricultores de maíz de los municipios de Salvatierra y Valle de Santiago, Guanajuato. Se muestrearon suelos de las parcelas, y se estimó el rendimiento, la concentración de nutrientes y la mineralización del C. Con los datos obtenidos se realizaron gráficas del balance de N, P, K y C.  Resultados:  El manejo de la nutrición y la producción de biomasa variaron entre los agricultores. Actualmente, el P y K no son factores limitantes, contrario al N, ya que el suelo solo aporta el 11 % del nitrógeno total disponible. El manejo de los residuos demostró que existe un desbalance entre la mineralización de C del suelo y la incorporación de residuos.  Limitaciones del estudio: El análisis se centró solo en un ciclo agrícola.  Originalidad:  El enfoque del estudio, incluyendo el análisis gráfico, es escasamente aplicado en los sistemas de cultivo de maíz de la región.  Conclusiones:  Se requiere una visión integral para el manejo de la nutrición órgano-mineral y gestión de los residuos para contribuir a su uso eficiente y sustentable.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[nitrogen]]></kwd>
<kwd lng="en"><![CDATA[phosphorus]]></kwd>
<kwd lng="en"><![CDATA[potassium]]></kwd>
<kwd lng="en"><![CDATA[carbon]]></kwd>
<kwd lng="en"><![CDATA[residues]]></kwd>
<kwd lng="en"><![CDATA[nutrient use efficiency]]></kwd>
<kwd lng="en"><![CDATA[Guanajuato]]></kwd>
<kwd lng="es"><![CDATA[nitrógeno]]></kwd>
<kwd lng="es"><![CDATA[fósforo]]></kwd>
<kwd lng="es"><![CDATA[potasio]]></kwd>
<kwd lng="es"><![CDATA[carbono]]></kwd>
<kwd lng="es"><![CDATA[residuos]]></kwd>
<kwd lng="es"><![CDATA[uso eficiente de nutrientes]]></kwd>
<kwd lng="es"><![CDATA[Guanajuato]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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