<?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>2301-1548</journal-id>
<journal-title><![CDATA[Agrociencia (Uruguay)]]></journal-title>
<abbrev-journal-title><![CDATA[Agrociencia Uruguay]]></abbrev-journal-title>
<issn>2301-1548</issn>
<publisher>
<publisher-name><![CDATA[Facultad de Agronomía - Instituto Nacional de Investigación Agropecuaria]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2301-15482019000200124</article-id>
<article-id pub-id-type="doi">10.31285/agro.23.102</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Estimación de la relación de pérdida de suelo para el cultivo de colza (Brassica napus) a partir del modelo USLE/RUSLE en Uruguay]]></article-title>
<article-title xml:lang="en"><![CDATA[Estimation of Soil Loss Ratio for Rapeseed Crop (Brassica napus) from the USLE/RUSLE Model in Uruguay]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Olivera]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ferreira]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pérez]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Clérici]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Ministerio de Ganadería Agricultura y Pesca Dirección General de Recursos Naturales División Suelos y Aguas]]></institution>
<addr-line><![CDATA[Montevideo ]]></addr-line>
<country>Uruguay</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de la República Facultad de Agronomía Departamento de Suelos y Aguas]]></institution>
<addr-line><![CDATA[Montevideo ]]></addr-line>
<country>Uruguay</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>23</volume>
<numero>2</numero>
<fpage>124</fpage>
<lpage>134</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.edu.uy/scielo.php?script=sci_arttext&amp;pid=S2301-15482019000200124&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.edu.uy/scielo.php?script=sci_abstract&amp;pid=S2301-15482019000200124&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.edu.uy/scielo.php?script=sci_pdf&amp;pid=S2301-15482019000200124&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: En Uruguay, desde 1981 existe un marco legal que declara de interés nacional promover y regular el uso y la conservación de los suelos y las aguas superficiales destinados a fines agropecuarios. En este marco se han implementado los «Planes de Uso y Manejo del Suelo» (PUMS) como norma técnica que regula el uso del suelo. En el cumplimiento de esta normativa, se estima la pérdida de suelo por erosión de determinado uso y manejo, con el programa EROSIÓN 6.0, basado en la USLE/RUSLE, en el que cada cultivo tiene su factor de Relación de Pérdida de Suelo (RPS). Para las condiciones de producción de Uruguay, el cultivo de colza (Brassica napus L.) no cuenta con el factor antes mencionado. El objetivo de este trabajo fue determinar la RPS de colza, para cada periodo del cultivo (PC). Durante cuatro años se recolectaron datos en chacras comerciales y experimentales ubicadas en el litoral oeste de Uruguay. Los valores promedio de RPS obtenidos para el PC1, PC2, PC3 y PC4 fueron 0,142, 0,079, 0,032 y 0,040, respectivamente. La variabilidad de los valores de RPS en PC1 y PC4 fue explicada por la cobertura del suelo por residuos (CR) solamente (RPSPC1= 0,6772 e-0,028CR y RPSPC4= 0,4221 - 0,0091CR + 0,00005CR2, respectivamente), mientras que en PC2 y PC3 fue explicada por la CR más la cobertura aérea (CobA) del propio cultivo (RPSPC2 = 0,38 - 0,0049CR + 0,000019CR2 - 0,000018CobA2 y RPSPC3 = 0,225 - 0,00237CR - 0,00084CobA + 0,00001CR2, respectivamente).]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Summary: In Uruguay, since 1981 there is a legal framework by which it is declared of national interest to promote and regulate the use and conservation of soils and surface waters destinated to agricultural purposes. In this framework, the «Land Use and Management Plans» (PUMS) have been implemented as a technical norm that regulates land use. In compliance with this regulation, the loss of soil due to erosion of certain use and management is estimated with the EROSION 6.0 program, based on the USLE/RUSLE, in which each crop has its Soil Loss Ratio factor (RPS). For the production conditions of Uruguay, the rapeseed crop (Brassica napus L.) does not have the aforementioned factor. The objective of this work was to determine the RPS of rapeseed, for each crop period (CP). For four years data was collected from commercial farms and experimental sites located on the western coast of Uruguay. The average RPS values obtained for PC1, PC2, PC3 and PC4 were 0.142, 0.079, 0.032 and 0.040, respectively. The variability of the RPS values in PC1 and PC4, was explained by the soil cover by residues (CR) only (RPSPC1 = 0.6772e-0.028CR and RPSPC4 = 0.4221 - 0.0091CR + 0.00005CR2, respectively), while in PC2 and PC3 it was explained by the CR more air coverage (CobA) of the crop itself (RPSPC2 = 0.38 - 0.0049CR + 0.000019CR2 - 0.000018CobA2 and RPSPC3 = 0.225 - 0, 00237CR - 0.00084CobA + 0.00001CR2, respectively).]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[RPS]]></kwd>
<kwd lng="es"><![CDATA[colza]]></kwd>
<kwd lng="es"><![CDATA[suelos]]></kwd>
<kwd lng="es"><![CDATA[erosión]]></kwd>
<kwd lng="es"><![CDATA[factor C]]></kwd>
<kwd lng="en"><![CDATA[SLR]]></kwd>
<kwd lng="en"><![CDATA[oilseed rape]]></kwd>
<kwd lng="en"><![CDATA[soils]]></kwd>
<kwd lng="en"><![CDATA[erosion]]></kwd>
<kwd lng="en"><![CDATA[C factor]]></kwd>
</kwd-group>
</article-meta>
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