<?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>1405-3322</journal-id>
<journal-title><![CDATA[Boletín de la Sociedad Geológica Mexicana]]></journal-title>
<abbrev-journal-title><![CDATA[Bol. Soc. Geol. Mex]]></abbrev-journal-title>
<issn>1405-3322</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Geológica Mexicana A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1405-33222023000200111</article-id>
<article-id pub-id-type="doi">10.18268/bsgm2023v75n2a280323</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[El magnetismo y el color como indicadores de cambios en el suelo por quema agrícola]]></article-title>
<article-title xml:lang="en"><![CDATA[Magnetism and color as indicators of changes in soil by stubble burning]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Iniesta-Martínez]]></surname>
<given-names><![CDATA[Lizeth]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García-Ruiz]]></surname>
<given-names><![CDATA[Rafael]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sánchez]]></surname>
<given-names><![CDATA[Rufo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Goguitchaichvili]]></surname>
<given-names><![CDATA[Avto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bautista]]></surname>
<given-names><![CDATA[Francisco]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional Autónoma de México Centro de Investigaciones en Geografía Ambiental Laboratorio Universitario de Geofísica Ambiental]]></institution>
<addr-line><![CDATA[ Michoacán]]></addr-line>
<country>México</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional Autónoma de México Instituto de Geofísica Laboratorio Universitario de Geofísica Ambiental]]></institution>
<addr-line><![CDATA[ Michoacán]]></addr-line>
<country>México</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Juárez Autónoma de Tabasco División Académica de Ciencias Agropecuarias ]]></institution>
<addr-line><![CDATA[ Tabasco]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2023</year>
</pub-date>
<volume>75</volume>
<numero>2</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1405-33222023000200111&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1405-33222023000200111&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1405-33222023000200111&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN La quema agrícola es una práctica común en las plantaciones de caña de azúcar en México, se le atribuyen efectos positivos y negativos sobre el suelo. Sin embargo, no existe un consenso sobre los cambios que provoca la quema del suelo, por lo que es necesario estudiar este fenómeno a través de indicadores de bajo costo y rápido análisis. Las técnicas magnéticas y de color pueden ser métodos indirectos, rápidos y económicos que pueden ayudar a comprender los cambios químicos que la quema agrícola provoca en los suelos. Este trabajo tuvo como objetivo evaluar el color y la susceptibilidad magnética como indicadores de cambio en el suelo por efecto de la quema agrícola. El estudio se realizó en un Vertisol cultivado con caña de azúcar en Tabasco, México. Se tomaron muestras de suelo en diez sitios dentro de la parcela, en cada sitio se colectaron muestras cada dos centímetros hasta 20 cm de profundidad del suelo, antes y después de la quema agrícola. En total se analizaron 200 muestras de suelo. Durante las quemas, se registraron las temperaturas del suelo a 0, 2 y 5 cm de profundidad. Los parámetros e índices de color se analizaron con el sistema CIE-L*a*b*, y la susceptibilidad magnética de alta y baja frecuencia se midieron con un equipo Bartington MS2. Después de la quema agrícola, los suelos mostraron un aumento de los tonos oscuros a cuatro centímetros de profundidad. Los parámetros magnéticos también mostraron cambios en el suelo para los 4 cm de profundidad después de la quema agrícola. Los resultados muestran que el color y la susceptibilidad magnética son propiedades del suelo eficientes para identificar las modificaciones del suelo causadas por la quema agrícola. En este estudio de caso, el efecto de la quema agrícola en los cultivos de caña de azúcar fue de corto plazo y superficial en el Vertisol.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT Agricultural burning is a common practice in sugarcane plantations in Mexico that exerts positive and negative effects on the soil. However, there is no consensus on the soil changes caused by the burning, thus highlighting the need to study this phenomenon through low-cost and quick-to-analyze indicators. Magnetic and color techniques can be indirect, fast, and cheap methods that can help to understand the chemical changes that agricultural burning causes to soils. We aim to evaluate the color and magnetic susceptibility of the soil as indicators of changes caused by agricultural burning. The study was carried out on a Vertisol grown with sugarcane in Tabasco, Mexico. Soil samples were taken at ten sites within the plot, at each site soil samples were collected every two centimeters up to 20 cm of soil depth, before and after agricultural burning. In total, 200 soil samples were analyzed. Temperatures were recorded during agricultural burning at 0, 2, and 5 cm depths. The parameters and color indices were analyzed in the CIE-L*a*b* system in the soil samples, and the high and low-frequency magnetic susceptibility were measured with Bartington MS2 equipment. After agricultural burning, the soils showed increased dark tones at four centimeters depth. Also, magnetic parameters showed changes in soil for the 4 cm in depth after the agricultural burning. The results show that color and magnetic susceptibility are efficient soil properties for identifying soil modifications caused by agricultural burning. In this case study, the effect of agricultural burning on sugarcane crops was short-term and shallow in the soil.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Susceptibilidad Magnética]]></kwd>
<kwd lng="es"><![CDATA[CIE-L*a*b*]]></kwd>
<kwd lng="es"><![CDATA[RGB]]></kwd>
<kwd lng="es"><![CDATA[Índice de enrojecimiento]]></kwd>
<kwd lng="es"><![CDATA[Vertisol]]></kwd>
<kwd lng="en"><![CDATA[Magnetic Susceptibility]]></kwd>
<kwd lng="en"><![CDATA[CIE-L*a*b*]]></kwd>
<kwd lng="en"><![CDATA[RGB]]></kwd>
<kwd lng="en"><![CDATA[Redness Index,Vertisol]]></kwd>
</kwd-group>
</article-meta>
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