<?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>0871-018X</journal-id>
<journal-title><![CDATA[Revista de Ciências Agrárias]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. de Ciências Agrárias]]></abbrev-journal-title>
<issn>0871-018X</issn>
<publisher>
<publisher-name><![CDATA[Sociedade de Ciências Agrárias de Portugal]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0871-018X2021000100001</article-id>
<article-id pub-id-type="doi">10.19084/rca.20001</article-id>
<title-group>
<article-title xml:lang="pt"><![CDATA[Determinação de atributos físicos de solos arenoso por meio de Georadar]]></article-title>
<article-title xml:lang="en"><![CDATA[Determination of physical attributes of sandy soils through Georadar]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Francelino]]></surname>
<given-names><![CDATA[Márcio Rocha]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Condé]]></surname>
<given-names><![CDATA[Viviane Flaviana]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Thomazini]]></surname>
<given-names><![CDATA[André]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Albuquerque]]></surname>
<given-names><![CDATA[Manoel Ricardo Abreu]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vianna]]></surname>
<given-names><![CDATA[João Hebert Moreira]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Santos]]></surname>
<given-names><![CDATA[Flavia Cristina dos]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidade Federal de Viçosa Departamento de Solo ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Brazil</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidade Federal de São João del-Rei Departamento de Ciências Agrárias ]]></institution>
<addr-line><![CDATA[Sete Lagoas ]]></addr-line>
<country>Brazil</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Embrapa Milho e Sorgo  ]]></institution>
<addr-line><![CDATA[Sete Lagoas ]]></addr-line>
<country>Brazil</country>
</aff>
<pub-date pub-type="pub">
<day>30</day>
<month>03</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>30</day>
<month>03</month>
<year>2021</year>
</pub-date>
<volume>44</volume>
<numero>1</numero>
<fpage>1</fpage>
<lpage>10</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_arttext&amp;pid=S0871-018X2021000100001&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_abstract&amp;pid=S0871-018X2021000100001&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.pt/scielo.php?script=sci_pdf&amp;pid=S0871-018X2021000100001&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Resumo A região central do Brasil é a sua atual fronteira agrícola, com rápida expansão das culturas de soja, café e algodão sob solos arenosos. Um dos grandes desafios de manejo desse tipo de solo é a redução da sua baixa fertilidade natural e manutenção da umidade. Esse trabalho teve o objetivo de avaliar a aplicabilidade do uso de Radar de Penetração do Solo (GPR) na determinação de atributos de solos arenosos da parte central do Brasil. O estudo foi realizado no sudeste do estado da Bahia, numa área de topografia plana e sob pastagem. Foram amostrados dois perfis completos, cujas amostras foram analisadas química e fisicamente. A leitura foi realizada em transectos com comprimento acima de 500m. Foi utilizado GPR equipado com antena de 400 MHz. Foram aplicadas as equações de Topp, Ledieu e Condé para determinação da umidade gravimétrica a partir de valores de constante dielétrica obtidas dos radargramas. Foi observado tratar-se de solos profundos, sem impedimentos físico e que apresenta aumento da umidade em profundidade.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The central region of Brazil is its current agricultural frontier, with rapid expansion of soy, coffee and cotton crops under sandy soils. One of the major management challenges for this type of soil is the reduction of its low natural fertility and maintenance of humidity. This work had the objective of evaluating the applicability of the use of Soil Penetration Radar (GPR) in the determination of attributes of sandy soils in the central part of Brazil. The study was carried out in the southeastern state of Bahia, in an area of flat relief and under pasture. Two complete profiles were sampled, whose samples were analyzed chemically and physically. The reading was performed in transects with lengths over 500m. GPR equipped with a 400 MHz antenna was used. The Topp, Ledieu and Condé equations were applied to determine the gravimetric humidity from the dielectric constant values obtained from the radargrams. It was observed that these are deep soils, without physical impediments and that there is an increase in humidity in depth.]]></p></abstract>
<kwd-group>
<kwd lng="pt"><![CDATA[Radar de penetração do solo]]></kwd>
<kwd lng="pt"><![CDATA[umidade do solo]]></kwd>
<kwd lng="pt"><![CDATA[constante dielétrica]]></kwd>
<kwd lng="en"><![CDATA[Ground penetration radar]]></kwd>
<kwd lng="en"><![CDATA[soil moisture]]></kwd>
<kwd lng="en"><![CDATA[dielectric constant]]></kwd>
</kwd-group>
</article-meta>
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