<?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>0120-2812</journal-id>
<journal-title><![CDATA[Acta Agronómica]]></journal-title>
<abbrev-journal-title><![CDATA[Acta Agron.]]></abbrev-journal-title>
<issn>0120-2812</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional de Colombia]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0120-28122020000300162</article-id>
<article-id pub-id-type="doi">10.15446/acag.v69n3.69401</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[ImageJ software as an alternative method for estimating leaf area in oats]]></article-title>
<article-title xml:lang="es"><![CDATA[Software ImageJ como método alternativo para estimar área foliar en avena]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Martin]]></surname>
<given-names><![CDATA[Thomas Newton]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Fipke]]></surname>
<given-names><![CDATA[Glauber Mongon]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Minussi Winck]]></surname>
<given-names><![CDATA[José Eduardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Márchese]]></surname>
<given-names><![CDATA[José Abramo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidade Federal de Santa María  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Brazil</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidade Federal do Pampa-Campus Itaqui  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Brazil</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidade Tecnológica Federal do Paraná Campus Pato Branco ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Brazil</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2020</year>
</pub-date>
<volume>69</volume>
<numero>3</numero>
<fpage>162</fpage>
<lpage>169</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0120-28122020000300162&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0120-28122020000300162&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0120-28122020000300162&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract The aim of this study was to compare two methods of estimating leaf area (leaf area meter LI-COR 3100 and ImageJ software) in oats. Renascem black oats and UTF Iguaqu white oats cultivars were evaluated. All the leaves of one plant per plot, with six repetitions, were evaluated every seven days to obtain five assessments for each cultivar. The leaves were identified and fixed on a white A4 sheet of paper with an indication of a known area (45 cm2), photographed and evaluated using a leaf area meter (LI-3100 - LI-COR). Leaf area was then estimated using ImageJ software. Estimates were obtained for standard deviation and coefficient of variation, and a simple linear regression equation was estimated based on the two estimation methods. Mean variances were tested using the &#8216;F&#8217;-test and the means compared by the &#8216;t&#8217;-test. There was no difference between the leaf areas found by both methods. In addition, they were highly correlated, and variances were homogeneous. We concluded that ImageJ software can be used instead of the leaf area meter on the two oat cultivars evaluated.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen El objetivo del estudio fue comparar dos métodos (Integrador del área foliar LI-COR 3100 y el software ImageJ para estimar el área foliar en el cultivo de avena   (Avena sativa L.). Para el efecto se evaluaron dos variedades de avena, una negra (Renascem) y otra blanca (UTF Iguaqu). Se utilizaron seis repeticiones (diseño completamente aleatorio), con la recolección de todas las hojas de una planta seleccionada al azar por parcela cada 7 días y un total de cinco evaluaciones para cada variedad. Las hojas cosechadas fueron identificadas y fijadas sobre una hoja A4 blanca, con una marca de área conocida (45 cm2), fotografiadas y evaluadas utilizando el integrador de área de la hoja (medidor de área LI3100 - LI-COR). Posteriormente en las mismas hojas se midieron las áreas foliares utilizando el software ImageJ. Con los datos obtenidos en cada método se calcularon la desviación estándar, el coeficiente de variación, y la ecuación de regresión lineal simple. Las varianzas de los valores se probaron con la prueba &#8216;F&#8217; y las medias se compararon con la prueba &#8216;t&#8217;. Al considerar todas las hojas evaluadas por ambos métodos, se encontró que las áreas de las hojas no difieren entre ellas cuando se comparan con los métodos propuestos. Además, tienen altas correlaciones y las variaciones son homogéneas. Como conclusiones, se encontró que el método que usa el software ImageJ puede ser utilizado para reemplazar el integrador del área de la hoja para las variedades de avena evaluados.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Avena strigosa Schreb.]]></kwd>
<kwd lng="en"><![CDATA[Avena sativa L.]]></kwd>
<kwd lng="en"><![CDATA[leaf area meter]]></kwd>
<kwd lng="en"><![CDATA[LI-COR 3100]]></kwd>
<kwd lng="es"><![CDATA[Avena strigosa Schreb.]]></kwd>
<kwd lng="es"><![CDATA[Avena sativa L.]]></kwd>
<kwd lng="es"><![CDATA[integrador del área foliar]]></kwd>
<kwd lng="es"><![CDATA[LI-COR 3100]]></kwd>
</kwd-group>
</article-meta>
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