<?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>1405-3195</journal-id>
<journal-title><![CDATA[Agrociencia]]></journal-title>
<abbrev-journal-title><![CDATA[Agrociencia]]></abbrev-journal-title>
<issn>1405-3195</issn>
<publisher>
<publisher-name><![CDATA[Colegio de Postgraduados]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1405-31952017000800813</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Indicadores de calidad de suelo para evaluar su fertilidad]]></article-title>
<article-title xml:lang="en"><![CDATA[Soil quality indicators to evaluate soil fertility]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Estrada-Herrera]]></surname>
<given-names><![CDATA[I. Rayo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hidalgo-Moreno]]></surname>
<given-names><![CDATA[Claudia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Guzmán-Plazola]]></surname>
<given-names><![CDATA[Remigio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Almaraz Suárez]]></surname>
<given-names><![CDATA[J. José]]></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[Etchevers-Barra]]></surname>
<given-names><![CDATA[Jorge D.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Colegio de Postgraduados  ]]></institution>
<addr-line><![CDATA[Montecillo Estado de México]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2017</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2017</year>
</pub-date>
<volume>51</volume>
<numero>8</numero>
<fpage>813</fpage>
<lpage>831</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1405-31952017000800813&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1405-31952017000800813&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1405-31952017000800813&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen La Mixteca Alta Oaxaqueña, México (MAO), presenta niveles moderados a graves de degradación de suelo. La erosión hídrica y eólica son las principales causas de esa degradación, con pérdidas de suelo entre 50 y 200 Mg ha-1 año-1 y en algunas zonas puede ser mayor. Los indicadores de calidad (ICS) son herramientas útiles para evaluar el estado de la fertilidad del suelo y su degradación. El objetivo de este estudio fue generar indicadores de calidad (univariados) cuyos valores, comprendidos dentro de una escala única, permitan evaluar la fertilidad de suelos de la MAO y situarlos en un mapa temático de degradación. Las hipótesis fueron: 1) los atributos evaluados en este estudio funcionan como ICS y 2) los valores de los ICS que varían dentro de una escala única permiten comparar los estados de estos atributos. El valor de los indicadores permitirá proponer acciones correctivas del manejo agronómico de los suelos y evitar su degradación. Esta propuesta es de ejecución fácil, costo bajo, generación rápida, que usa información disponible en la literatura y puede apoyar políticas públicas regionales. Los atributos químicos y fisicoquímicos evaluados fueron: pH, materia orgánica (MO), P extraíble (Pex), bases de intercambio (Ca, Mg y K), capacidad de intercambio catiónico efectiva (CICE); además, uno biológico, el carbono en biomasa microbiana (CBM). Con estos atributos se definieron los indicadores de calidad, los valores de éstos y las clases de calidad de suelo en sitios agrícolas y degradados de cinco localidades de la MAO: Tonaltepec, Gavillera, Cerro Prieto, Nduayaco y Pericón, donde hubo apoyo de la comunidad. El muestreo fue completamente aleatorio. Los sitios de donde se obtuvieron las muestras para generar los ICS se georeferenciaron y ubicaron en un mapa temático de tipos de degradación. Los valores de los indicadores y las clases de calidad generados evidenciaron el precario estado de fertilidad de los suelos de la MAO. Su uso permitirá proponer medidas correctivas para mejorar la fertilidad actual de los suelos y evitar una mayor degradación.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The Mixteca Alta Oaxaqueña, Mexico (MAO), presents moderate to severe levels of soil degradation. Water and wind erosion are the main causes of this degradation, with soil losses between 50 and 200 Mg ha-1 year-1 and in some areas may be higher. Soil quality indicators (SQI) are useful tools for assessing the status of soil fertility and its degradation. The objective of this study was to generate (univariate) quality indicators whose values, included within a single scale, allow to evaluate the soil fertility of the MAO and place them on a thematic map of degradation. The hypotheses were: 1) the attributes evaluated in this study function as SQI, and 2) the SQI values that vary within a single scale allow to compare the states that these attributes maintain. The value of the indicators will allow to propose corrective actions of the agronomic management of the soils and avoid their degradation. This proposal is easy to implement, of low cost, fast generation, can use information available in the literature and support regional public policies. The chemical and physicochemical attributes evaluated were: pH, organic matter (OM), extractable P (Pex), exchange bases (Ca, Mg and K), effective cation exchange capacity (ECEC); plus a biological one, the carbon in microbial biomass (CBM). With these attributes, quality indicators, soil quality and soil quality classes were defined in agricultural and degraded sites in five localities of the MAO: Tonaltepec, Gavillera, Cerro Prieto, Nduayaco and Pericón, where there was support from the community. Sampling was completely randomized. The sites from where the samples were obtained to generate the SQI were georeferenced and located on a thematic map of degradation types. The values of the indicators and the quality classes generated evidenced the precarious state of fertility of the MAO soils. Its use will allow to propose corrective measures to improve the current fertility of soils and avoid further degradation.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[indicadores de calidad de suelo]]></kwd>
<kwd lng="es"><![CDATA[suelos degradados]]></kwd>
<kwd lng="es"><![CDATA[fertilidad suelos]]></kwd>
<kwd lng="es"><![CDATA[Mixteca Alta Oaxaqueña]]></kwd>
<kwd lng="en"><![CDATA[soil quality indicators]]></kwd>
<kwd lng="en"><![CDATA[degraded soils]]></kwd>
<kwd lng="en"><![CDATA[soil fertility]]></kwd>
<kwd lng="en"><![CDATA[Mixteca Alta Oaxaqueña]]></kwd>
</kwd-group>
</article-meta>
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