<?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>0379-3982</journal-id>
<journal-title><![CDATA[Revista Tecnología en Marcha]]></journal-title>
<abbrev-journal-title><![CDATA[Tecnología en Marcha]]></abbrev-journal-title>
<issn>0379-3982</issn>
<publisher>
<publisher-name><![CDATA[Instituto Tecnológico de Costa Rica]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0379-39822021000400028</article-id>
<article-id pub-id-type="doi">10.18845/tm.v34i4.5320</article-id>
<title-group>
<article-title xml:lang="pt"><![CDATA[Variabilidade espacial da palha de soja distribuída na colheita e sua relação com o estande final de aveia preta]]></article-title>
<article-title xml:lang="en"><![CDATA[Spatial variability of soybean straw distributed at harvest and its relationship with the final stand of black oats]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Tagliari-Balestrin]]></surname>
<given-names><![CDATA[Júlio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Peres-da-Rosa]]></surname>
<given-names><![CDATA[David]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cazaroto]]></surname>
<given-names><![CDATA[Bruno]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Acadêmico do curso de Agronomia do Instituto Federal de Educação, Ciência e Tecnologia do Rio Grande do Sul Campus Sertão ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Brasil</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Federal de Educação, Ciência e Tecnologia do Rio Grande do Sul Campus Sertão ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Brazil</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Instituto Federal de Educação, Ciência e Tecnologia do Rio Grande do Sul Campus Sertão ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Brazil</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2021</year>
</pub-date>
<volume>34</volume>
<numero>4</numero>
<fpage>28</fpage>
<lpage>37</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S0379-39822021000400028&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S0379-39822021000400028&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S0379-39822021000400028&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Resumen Objetivo desse trabalho foi avaliar o efeito da variabilidade espacial da distribuição da palha na colheita da soja na emergência de aveia preta em sistema plantio direto. O experimento foi conduzido em uma área agrícola de 2,6 ha, sendo avaliados a quantidade de palha (kg ha-1) de soja distribuida pela colhedora, e o estande final de aveia preta (plantas m-2). Foi empregado um gride amostral de 20 pontos, sendo 10 pontos no centro da colhedora e os outros 10 nas extremidades. Nos pontos no centro da colhedora, a quantidade de palha variou de 6.424 a 12.000 kg ha-1 ( = 8.788 ± 1.669 kg ha-1), já o estande final de plantas de aveia preta variou de 165 a 212 plantas m-2 ( = 191 ± 14 plantas m-2). Nos pontos relativos às extremidades, a quantidade de palha reduziu, variando de 1.697 a 3.394 kg ha-1 ( = 2.448 ± 588 kg ha-1), e estande final de plantas de aveia preta aumentou para 267 a 306 plantas m-2 ( = 285 ± 13 plantas m-2), ou seja, redução de 72,14% na quantidade de palha e um aumento de 49,21% no estande. As variáveis analisadas apresentaram correlação forte, negativa e significativa (r = - 0,887; P &#706; 0,05), desde modo, a colhedora empregada no estudo distribui a palha desuniforme, sendo que esta ação afeta o estande final da aveia preta.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The objective of this work was to evaluate the effect of spatial variability straw distribution on soybean harvest in the emergence of black oats in no-tillage system. The experiment was carried out in an agricultural area of 2.6 ha, being evaluated the amount of soybean straw (kg ha-1) distributed by the harvester, and the final stand of black oats (plants m-2). A 20-point sampling grid was used, 10 points in the center of the harvester and the other 10 at the ends. At the points in the center of the harvester, the amount of straw varied from 6,424 to 12,000 kg ha-1 ( = 8,788 ± 1,669 kg ha-1), while the final stand of black oat plants ranged from 165 to 212 plants m-2 ( = 191 ± 14 plants m-2). In the points related to the ends, the amount of straw reduce to 1,697 to 3,394 kg ha-1 ( = 2,448 ± 588 kg ha-1) and the final stand of black oat increase to 267 to 306 plants m-2 ( = 285 ± 13 plants m-2), that is, a reduction of 72.14% in the amount of straw and an increase of 49.21% in the stand. The variables analyzed showed a strong, negative and significant correlation (r = - 0.887; P &#706; 0.05), therefore, the combine used in this study distributes the uneven straw, and this action affects the final stand of black oats.]]></p></abstract>
<kwd-group>
<kwd lng="pt"><![CDATA[Plantio direto]]></kwd>
<kwd lng="pt"><![CDATA[colhedora]]></kwd>
<kwd lng="pt"><![CDATA[resíduo vegetal]]></kwd>
<kwd lng="pt"><![CDATA[variabilidade espacial]]></kwd>
<kwd lng="en"><![CDATA[No-tillage]]></kwd>
<kwd lng="en"><![CDATA[combine]]></kwd>
<kwd lng="en"><![CDATA[plant residue]]></kwd>
<kwd lng="en"><![CDATA[spatial variability]]></kwd>
</kwd-group>
</article-meta>
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