<?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>0187-5779</journal-id>
<journal-title><![CDATA[Terra Latinoamericana]]></journal-title>
<abbrev-journal-title><![CDATA[Terra Latinoam]]></abbrev-journal-title>
<issn>0187-5779</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Mexicana de la Ciencia del Suelo A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0187-57792014000300241</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Material particulado diseminado al realizer dos tipos de labranza en un suelo agrícola del Valle de Mesilla, Nuevo México.]]></article-title>
<article-title xml:lang="en"><![CDATA[Particulate matter menerated during disking and plowing in an agricultural soil of Mesilla Valley, New Mexico]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Shukla]]></surname>
<given-names><![CDATA[Manoj K.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Margez]]></surname>
<given-names><![CDATA[Juan Pedro Flores]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,New Mexico State University Department of Plant and Environmental Sciences ]]></institution>
<addr-line><![CDATA[Las Cruses Nuevo Mexico]]></addr-line>
<country>USA</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Autónoma de Ciudad Juárez  ]]></institution>
<addr-line><![CDATA[Ciudad Juárez Chihuahua]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2014</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2014</year>
</pub-date>
<volume>32</volume>
<numero>3</numero>
<fpage>241</fpage>
<lpage>249</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0187-57792014000300241&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0187-57792014000300241&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0187-57792014000300241&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: Las actividades agrícolas durante la preparación del terreno son una fuente importante de diseminación de material particulado (MP). Los objetivos del presente estudio fueron evaluar la dispersión de MP causada por actividades de labranza del suelo con diferentes implementos y velocidades del tractor, así como relacionar la dispersión de MP con las propiedades físicas del suelo. El suelo fue cultivado con algodonero durante 2008 y se dividió en seis parcelas de 5 × 20 m. Las actividades de labranza fueron rastreo con disco y con arado de cincel, a dos velocidades del tractor (4.8 y 6.5 km h-1). Se utilizaron tres muestreadores para medir el MP diseminado al aire en cada tratamiento. Se concluyó que una menor resistencia a la penetrabilidad y baja humedad del suelo contribuyeron a mayor MP dispersado en el rastreo con disco, mientras que la dispersión de MP con arado de cincel en condiciones similares, de baja humedad del suelo, podría estar más influenciada por la resistencia del suelo a la penetrabilidad y por la densidad aparente, lo cual puede explicarse a que el arado es a mayor profundidad de suelo que el rastreo. Se detectó efecto significativo del método de labranza y la velocidad del tractor en la dispersión de MP, lo cual fue favorecido por la predominancia de partículas finas del suelo (limo y arcilla), con un nivel de compactación intermedio y baja velocidad del viento. La concentración mayor de MP (1.272 ± 0.855 mg m-3) fue cuando se utilizó la rastra de discos a 6.5 km h-1 de velocidad del tractor, seguido por el mismo implemento a 4.8 km h-1, mientras que el arado de cincel mostró concentraciones más bajas. La dispersión de MP en suelos agrícolas no solo depende de la velocidad del tractor y tipo de implemento de labranza, sino también de una menor penetrabilidad y baja humedad en suelos de textura intermedia, lo cual podría tener utilidad en estudios de erosión durante vientos fuertes y formación de tolvaneras, o bien implicaciones en la salud humana durante la exposición de los trabajadores de campo al MP dispersado al aire.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: Agriculture is an important source of airborne particulate matter (PM). The objectives of this study were to measure PM emissions due to some agricultural operations and relate PM emission to soil physical properties. The agriculture field for the PM emission experiment was located at Plant Sciences Research Center (PSRC) of New Mexico State University about 12 km south of Las Cruces in the Messiah Valley, Dona Ana County of NM along the Rio Grande River (32º 11' 35.84" N and 106º 44' 08.75" W). A field planted to cotton during 2007 was subdivided into six plots 5 m by 20 m, separated by a 5 m × 5 m strip. The plots were disked using a Massey Fergusson disk plow and chiseled by a Johnson plow. The tillage operations were conducted at two speeds with average tractor speeds of 4.8 and 6.5 km h-1, respectively. Three samplers were used to measure the MP dispersed in air at each treatment. All six plots displayed low variability in sand, silt and clay contents, antecedent soil moisture content as well as penetration resistance. In conclusion, under disking conditions the low resistance to penetration and low soil moisture contributed to high MP dispersion. Significant effect on MP dispersion was detected for tillage method and tractor speed and was favored by large amounts of fine soil particles (clay and silt), an intermediate compaction level, and low wind speed. Disk plowing overturns the soil from deeper depths than chisel plowing. The higher concentration of MP (1.272 ± 0.855 mg m-3) was caused by disking at 6.5 km h1 tractor speed followed by the same tillage method at 4.8 km h-1, while the chisel plowing method resulted in lower concentrations. MP dispersion in agricultural soils depends on tractor speed and soil moisture for intermediate soil textures. MP emission can be useful for soil erosion studies during dust storms, or its implications for human health during field workers' exposure to MP dispersed to air.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[resistencia a la penetrabilidad]]></kwd>
<kwd lng="es"><![CDATA[polvo]]></kwd>
<kwd lng="es"><![CDATA[preparación de suelo]]></kwd>
<kwd lng="es"><![CDATA[implemento agrícola]]></kwd>
<kwd lng="en"><![CDATA[resistance to penetration]]></kwd>
<kwd lng="en"><![CDATA[dust dispersed]]></kwd>
<kwd lng="en"><![CDATA[soil preparation]]></kwd>
<kwd lng="en"><![CDATA[tillage]]></kwd>
</kwd-group>
</article-meta>
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