<?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>1659-1321</journal-id>
<journal-title><![CDATA[Agronomía Mesoamericana]]></journal-title>
<abbrev-journal-title><![CDATA[Agron. Mesoam]]></abbrev-journal-title>
<issn>1659-1321</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Costa Rica]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1659-13212020000200291</article-id>
<article-id pub-id-type="doi">10.15517/am.v31i2.38387</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Flujos de metano en suelos con coberturas de pastos en el norte de Colombia]]></article-title>
<article-title xml:lang="en"><![CDATA[Methane fluxes in soils with pasture covers in the North of Colombia]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Espinosa-Carvajal]]></surname>
<given-names><![CDATA[Manuel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Contreras-Santos]]></surname>
<given-names><![CDATA[José Luis]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cadena-Torres]]></surname>
<given-names><![CDATA[Jorge]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Martínez-Atencia]]></surname>
<given-names><![CDATA[Judith del Carmen]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Jaramillo-Barrios]]></surname>
<given-names><![CDATA[Camilo Ignacio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Hurtado]]></surname>
<given-names><![CDATA[María del Pilar]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Corporación Colombiana de Investigación Agropecuaria (AGROSAVIA)  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Corporación Colombiana de Investigación Agropecuaria (AGROSAVIA)  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Corporación Colombiana de Investigación Agropecuaria (AGROSAVIA)  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Corporación Colombiana de Investigación Agropecuaria (AGROSAVIA)  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Corporación Colombiana de Investigación Agropecuaria (AGROSAVIA)  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af6">
<institution><![CDATA[,Universidad Nacional de Colombia  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Costa Rica</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2020</year>
</pub-date>
<volume>31</volume>
<numero>2</numero>
<fpage>291</fpage>
<lpage>309</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S1659-13212020000200291&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S1659-13212020000200291&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S1659-13212020000200291&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Introducción. Los sistemas tradicionales de producción ganadera en Colombia se basan en el establecimiento de pasturas en grandes extensiones de tierra, que generan gases de efecto invernadero, como el metano. Objetivo. El objetivo del presente estudio fue vigilar los flujos mensuales de metano que se producen en las praderas con tres cubiertas de suelo y tres niveles de fertilización de nitrógeno. Materiales y métodos. Se realizó un monitoreo a los flujos de metano durante un año comprendido entre noviembre de 2014 y noviembre de 2015, en un suelo Vertic Endoaquepts, ubicado en el Valle medio del río Sinú, Colombia. Se usó un diseño de bloques completos al azar, en arreglo en parcelas divididas, con dos repeticiones. Las parcelas principales constituidas por dos gramíneas (Brachiaria humidicola CIAT679 y Panicum maximum cv. Tanzania) y una con suelo descubierto, y las subparcelas por tres niveles de fertilización nitrogenada (0, 150, 300 kg N ha-1). Adicionalmente, se evaluaron las propiedades fisicoquímicas del suelo. Resultados. Durante la mayor parte del año (época de lluvias y seca) ocurrió oxidación de metano, asociado con la textura franca y porosidad del suelo en el área de estudio, que permitió la difusión libre de gases en el suelo. Los análisis de correlación mostraron estrecha relación entre los flujos de metano, porosidad, humedad, densidad aparente del suelo y la temperatura ambiente, sugiriendo a estos parámetros como los principales factores que afectan el flujo mensual de metano. Conclusiones. Los flujos de metano fueron independientes del tipo material vegetal y de la fertilización nitrogenada evaluada. Estos flujos dependieron de la época del año (seca y lluviosa) y exhibieron un balance anual negativo en el área de estudio, lo que sugiere que estos sistemas tienen las condiciones para comportarse como sumideros de metano durante la mayor parte del año.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Introduction. Traditional livestock production systems in Colombia are based on the establishment of pastures on large tracts of land, which generate greenhouse gases such as methane. Objective. The objective of the present study was to monitor the monthly methane fluxes that occur in meadows with three soil covers and three levels of nitrogen fertilization. Materials and methods. Methane fluxes were monitored for a year from November 2014 to November 2015, on a Vertic Endoaquepts soil, placed in the middle valley of the Sinu river, Colombia. A full block design was used at random, arranged in divided plots, with two replications. The main plots constituted of two grasses (Brachiaria humidicola CIAT679 and Panicum maximum cv. Tanzania) and one with bare soil, and the subplots by three nitrogen fertilization levels (0, 150, 300 kg N ha-1). Additionally, soil physicochemical properties were evaluated. Results. During most of the year (rainy and dry season) methane oxidation occurred, associated with the loam texture and porosity of the soil in the study area, which allowed the free diffusion of gases in the soil. Correlation analyzes showed a close relationship between methane fluxes, porosity, moisture, soil bulk density, and ambient temperature, suggesting these parameters as the main factors that affect the monthly methane flow. Conclusions. Methane fluxes were independent of the type of plant material and nitrogen fertilization evaluated. These flows depended on the time of year (dry and rainy) and exhibited a negative annual balance in the study area, which suggests that these systems have the conditions to behave as methane sinks during most of the year.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[gases de efecto invernadero]]></kwd>
<kwd lng="es"><![CDATA[propiedades del suelo]]></kwd>
<kwd lng="es"><![CDATA[Panicum]]></kwd>
<kwd lng="es"><![CDATA[Brachiaria]]></kwd>
<kwd lng="es"><![CDATA[producción ganadera]]></kwd>
<kwd lng="en"><![CDATA[greenhouse gases]]></kwd>
<kwd lng="en"><![CDATA[soil properties]]></kwd>
<kwd lng="en"><![CDATA[Panicum]]></kwd>
<kwd lng="en"><![CDATA[Brachiaria]]></kwd>
<kwd lng="en"><![CDATA[livestock production]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Aronson]]></surname>
<given-names><![CDATA[E.L]]></given-names>
</name>
<name>
<surname><![CDATA[Helliker]]></surname>
<given-names><![CDATA[B.R]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Methane flux in non-wetland soils in response to nitrogen addition: a meta-analysis]]></article-title>
<source><![CDATA[Ecology]]></source>
<year>2010</year>
<volume>91</volume>
<page-range>3242-51</page-range></nlm-citation>
</ref>
<ref id="B2">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bernabé]]></surname>
<given-names><![CDATA[Y]]></given-names>
</name>
<name>
<surname><![CDATA[Maineult]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Schubert]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Physics of porous media: fluid flow through porous media]]></article-title>
<source><![CDATA[Treatise on geophysics]]></source>
<year>2015</year>
<edition>2</edition>
<page-range>19-41</page-range><publisher-loc><![CDATA[Amsterdam, NLD ]]></publisher-loc>
<publisher-name><![CDATA[Elsevier]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B3">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Boeckx]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Cleemput]]></surname>
<given-names><![CDATA[O]]></given-names>
</name>
<name>
<surname><![CDATA[Cillaralvo]]></surname>
<given-names><![CDATA[I]]></given-names>
</name>
</person-group>
<source><![CDATA[Nutrient Cycling Agroecosyst.]]></source>
<year>1997</year>
<volume>49</volume>
<page-range>95</page-range></nlm-citation>
</ref>
<ref id="B4">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Born]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Dörr]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Levin]]></surname>
<given-names><![CDATA[I]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Methane consumption in aerated soils of the temperate zone]]></article-title>
<source><![CDATA[Tellus]]></source>
<year>1990</year>
<volume>42</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>2-8</page-range></nlm-citation>
</ref>
<ref id="B5">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bradford]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Ineson]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[Wookey]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[Lappin-Scott]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The effects of acid nitrogen and acid sulphur deposition on CH4 oxidation in a forest soil: a laboratory study]]></article-title>
<source><![CDATA[Soil Biol. Biochem.]]></source>
<year>2001</year>
<volume>33</volume>
<page-range>1695-702</page-range></nlm-citation>
</ref>
<ref id="B6">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Burt]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
</person-group>
<source><![CDATA[Soil survey field and laboratory methods manual. Soil Survey Investigations Report No. 51, Version 2.]]></source>
<year>2014</year>
<publisher-loc><![CDATA[WA, USA. ]]></publisher-loc>
<publisher-name><![CDATA[US Department of Agriculture, Natural Resources Conservation Service]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B7">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Capa]]></surname>
<given-names><![CDATA[M.E.D]]></given-names>
</name>
</person-group>
<source><![CDATA[Efecto de la fertilización orgánica y mineral en las propiedades del suelo, la emisión de los principales gases de efecto invernadero y en las diferentes fases fenológicas del cultivo de café (Coffea arabica L.).]]></source>
<year>2015</year>
<publisher-loc><![CDATA[Madrid, ESP. ]]></publisher-loc>
<publisher-name><![CDATA[Universidad de Madrid]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B8">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Castro]]></surname>
<given-names><![CDATA[M.S]]></given-names>
</name>
<name>
<surname><![CDATA[Gholz]]></surname>
<given-names><![CDATA[H.L]]></given-names>
</name>
<name>
<surname><![CDATA[Clark]]></surname>
<given-names><![CDATA[K.L]]></given-names>
</name>
<name>
<surname><![CDATA[Steudler]]></surname>
<given-names><![CDATA[P.A]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Effects of forest harvesting on soil methane fluxes in Florida slash pine plantations]]></article-title>
<source><![CDATA[Can. J. For. Res.]]></source>
<year>2000</year>
<volume>30</volume>
<page-range>1534-42</page-range></nlm-citation>
</ref>
<ref id="B9">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Charmley]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Williams]]></surname>
<given-names><![CDATA[S.R.O]]></given-names>
</name>
<name>
<surname><![CDATA[Moate]]></surname>
<given-names><![CDATA[P.J]]></given-names>
</name>
<name>
<surname><![CDATA[Hegarty]]></surname>
<given-names><![CDATA[R.S]]></given-names>
</name>
<name>
<surname><![CDATA[Herd]]></surname>
<given-names><![CDATA[R.M]]></given-names>
</name>
<name>
<surname><![CDATA[Oddy]]></surname>
<given-names><![CDATA[V.H]]></given-names>
</name>
<name>
<surname><![CDATA[Staunton]]></surname>
<given-names><![CDATA[K.M]]></given-names>
</name>
<name>
<surname><![CDATA[Anderson]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Hannah]]></surname>
<given-names><![CDATA[M.C]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A universal equation to predict methane production of forage-fed cattle in Australia]]></article-title>
<source><![CDATA[Anim. Prod. Sci.]]></source>
<year>2016</year>
<volume>56</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>169-80</page-range></nlm-citation>
</ref>
<ref id="B10">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Chu]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Hosen]]></surname>
<given-names><![CDATA[Y]]></given-names>
</name>
<name>
<surname><![CDATA[Yagi]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[NO, N2O, CH4 and CO2 fluxes in winter barley field of Japanese Andisol as affected by N fertilizer management]]></article-title>
<source><![CDATA[Soil Biol. Biochem.]]></source>
<year>2007</year>
<volume>39</volume>
<page-range>330-9</page-range></nlm-citation>
</ref>
<ref id="B11">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Clark]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The estimation and mitigation of agricultural greenhouse gas emissions from livestock]]></article-title>
<source><![CDATA[Proceedings of International Seminar on Livestock Production and Veterinary Technology]]></source>
<year>2016</year>
<page-range>5-13</page-range><publisher-loc><![CDATA[IDN ]]></publisher-loc>
<publisher-name><![CDATA[Indonesian Agency for Agricultural Research Development]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B12">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Di-Rienzo]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Casanoves]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
<name>
<surname><![CDATA[Balzarina]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Gonzalez]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
<name>
<surname><![CDATA[Tablada]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Robledo]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
</person-group>
<source><![CDATA[Infostat versión 2018]]></source>
<year>2018</year>
<publisher-loc><![CDATA[ARG ]]></publisher-loc>
<publisher-name><![CDATA[Universidad Nacional de Córdoba]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B13">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Dörr]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Katruff]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Levin]]></surname>
<given-names><![CDATA[I]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Soil texture parameterization of the methane uptake in aerated soils]]></article-title>
<source><![CDATA[Chemosphere]]></source>
<year>1993</year>
<volume>26</volume>
<page-range>697-713</page-range></nlm-citation>
</ref>
<ref id="B14">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Dunfield]]></surname>
<given-names><![CDATA[P.F]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The soil methane sink]]></article-title>
<source><![CDATA[Greenhouse gas sinks]]></source>
<year>2007</year>
<page-range>152-70</page-range><publisher-loc><![CDATA[Wallingford, USA, and Cambridge, GBR ]]></publisher-loc>
<publisher-name><![CDATA[CABI]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B15">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Fang]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Cheng]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Yu]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Cooch]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Wang]]></surname>
<given-names><![CDATA[Y]]></given-names>
</name>
<name>
<surname><![CDATA[Xu]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Li]]></surname>
<given-names><![CDATA[Y]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Low-level nitrogen deposition significantly inhibits methane uptake from an alpine meadow soil on the Qinghai-Tibetan Plateau]]></article-title>
<source><![CDATA[Geoderma]]></source>
<year>2014</year>
<volume>213</volume>
<page-range>444-52</page-range></nlm-citation>
</ref>
<ref id="B16">
<nlm-citation citation-type="book">
<collab>FAO</collab>
<source><![CDATA[Soluciones ganaderas para el cambio climático]]></source>
<year>2018</year>
<publisher-loc><![CDATA[Roma, ITA ]]></publisher-loc>
<publisher-name><![CDATA[FAO]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B17">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ferreira]]></surname>
<given-names><![CDATA[O]]></given-names>
</name>
</person-group>
<source><![CDATA[Flujos de gases de efecto invernadero, potencial de calentamiento global y evaluación de emergía del sistema agroforestal Quesungual en el sur de Lempira, Honduras]]></source>
<year>2008</year>
<publisher-loc><![CDATA[Palmira, COL. ]]></publisher-loc>
<publisher-name><![CDATA[Universidad Nacional de Colombia]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B18">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Fujikawa]]></surname>
<given-names><![CDATA[T]]></given-names>
</name>
<name>
<surname><![CDATA[Miyazaki]]></surname>
<given-names><![CDATA[T]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Effects of bulk density and soil type on the gas diffusion coefficient in repacked and undisturbed soils]]></article-title>
<source><![CDATA[Soil Sci.]]></source>
<year>2005</year>
<volume>170</volume>
<page-range>892-901</page-range></nlm-citation>
</ref>
<ref id="B19">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gebert]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Groengroeft]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Pfeiffer]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Relevance of soil physical properties for the microbial oxidation of methane in landfill covers]]></article-title>
<source><![CDATA[Soil Biol. Biochem.]]></source>
<year>2011</year>
<volume>43</volume>
<page-range>1759-67</page-range></nlm-citation>
</ref>
<ref id="B20">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Guzmán]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Ruiz]]></surname>
<given-names><![CDATA[J.F]]></given-names>
</name>
<name>
<surname><![CDATA[Cadena]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
</person-group>
<source><![CDATA[Regionalización de Colombia según la estacionalidad de la precipitación media mensual, a través análisis de componentes principales (ACP). Informe Técnico.]]></source>
<year>2014</year>
<publisher-loc><![CDATA[Bogotá D.C., COL. ]]></publisher-loc>
<publisher-name><![CDATA[IDEAM]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B21">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Hansen]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Mæhlum]]></surname>
<given-names><![CDATA[J.E.]]></given-names>
</name>
<name>
<surname><![CDATA[Bakken]]></surname>
<given-names><![CDATA[L.R.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[N2O and CH4 fluxes in soil influenced by fertilization and tractor traffic]]></article-title>
<source><![CDATA[Soil Biol. Biochem.]]></source>
<year>1993</year>
<volume>25</volume>
<page-range>621-30</page-range></nlm-citation>
</ref>
<ref id="B22">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Hao]]></surname>
<given-names><![CDATA[W.M]]></given-names>
</name>
<name>
<surname><![CDATA[Scharffe]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Crutzen]]></surname>
<given-names><![CDATA[P.J]]></given-names>
</name>
<name>
<surname><![CDATA[Sanhueza]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Production of N2O, CH4, and CO2 from soils in the tropical savanna during the dry season]]></article-title>
<source><![CDATA[J. Atmos. Chem.]]></source>
<year>1988</year>
<volume>7</volume>
<page-range>93-105</page-range></nlm-citation>
</ref>
<ref id="B23">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Hernández-Medrano]]></surname>
<given-names><![CDATA[J.H.]]></given-names>
</name>
<name>
<surname><![CDATA[Corona]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[El metano y la ganadería bovina en México: ¿Parte de la solución y no del problema?]]></article-title>
<source><![CDATA[Agroproductividad]]></source>
<year>2018</year>
<volume>11</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>46-51</page-range></nlm-citation>
</ref>
<ref id="B24">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Holdridge]]></surname>
<given-names><![CDATA[L.R]]></given-names>
</name>
</person-group>
<source><![CDATA[Ecología basada en zonas de vida]]></source>
<year>2000</year>
<publisher-loc><![CDATA[San José, CRI. ]]></publisher-loc>
<publisher-name><![CDATA[IICA]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B25">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Hou]]></surname>
<given-names><![CDATA[A.X.]]></given-names>
</name>
<name>
<surname><![CDATA[Chen]]></surname>
<given-names><![CDATA[G.X.]]></given-names>
</name>
<name>
<surname><![CDATA[Wang]]></surname>
<given-names><![CDATA[Z.P.]]></given-names>
</name>
<name>
<surname><![CDATA[Van-Cleemput]]></surname>
<given-names><![CDATA[O.]]></given-names>
</name>
<name>
<surname><![CDATA[Patrick]]></surname>
<given-names><![CDATA[W.H.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Methane and nitrous oxide emissions from a rice field in relation to soil redox and microbiological processes]]></article-title>
<source><![CDATA[Soil Sci. Soc. Am. J.]]></source>
<year>2000</year>
<volume>64</volume>
<page-range>2180-6</page-range></nlm-citation>
</ref>
<ref id="B26">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Hristov]]></surname>
<given-names><![CDATA[A.N]]></given-names>
</name>
<name>
<surname><![CDATA[Oh]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Lee]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Meinen]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Montes]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Ott]]></surname>
<given-names><![CDATA[T]]></given-names>
</name>
<name>
<surname><![CDATA[Firkins]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Rotz]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Dell]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Adesogan]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Yang]]></surname>
<given-names><![CDATA[W]]></given-names>
</name>
<name>
<surname><![CDATA[Tricarico]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Kebreab]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Waghorn]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Oosting]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
</person-group>
<source><![CDATA[Mitigation of greenhouse gas emissions in livestock production &#8211; A review of technical options for non-CO2 emissions. FAO Animal Production and Health Paper No. 177]]></source>
<year>2013</year>
<publisher-loc><![CDATA[Rome, ITA. ]]></publisher-loc>
<publisher-name><![CDATA[FAO]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B27">
<nlm-citation citation-type="book">
<collab>IGAC (Instituto Geográfico Agustín Codazzi)</collab>
<source><![CDATA[Métodos analíticos del laboratorio de suelos]]></source>
<year>2006</year>
<edition>6</edition>
<publisher-loc><![CDATA[Bogotá, COL. ]]></publisher-loc>
<publisher-name><![CDATA[Imprenta Nacional de Colombia]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B28">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Kammann]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Grünhage]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
<name>
<surname><![CDATA[Jäger]]></surname>
<given-names><![CDATA[H.J.]]></given-names>
</name>
<name>
<surname><![CDATA[Wachinger]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Methane fluxes from differentially managed grassland study plots: the important role of CH4 oxidation in grassland with a high potential for CH4 production]]></article-title>
<source><![CDATA[Environ. Poll.]]></source>
<year>2001</year>
<volume>115</volume>
<page-range>261-73</page-range></nlm-citation>
</ref>
<ref id="B29">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Kähkönen]]></surname>
<given-names><![CDATA[M.A.]]></given-names>
</name>
<name>
<surname><![CDATA[Wittmann]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Ilvesniemi]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
<name>
<surname><![CDATA[Westman]]></surname>
<given-names><![CDATA[C.J.]]></given-names>
</name>
<name>
<surname><![CDATA[Salkinoja-Salonen]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Mineralization of detritus and oxidation of methane in acid boreal coniferous forest soils: seasonal and vertical distribution and effects of clear-cut]]></article-title>
<source><![CDATA[Soil Biol. Biochem.]]></source>
<year>2002</year>
<volume>34</volume>
<page-range>1191-200</page-range></nlm-citation>
</ref>
<ref id="B30">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Klemedtsson]]></surname>
<given-names><![CDATA[A.K]]></given-names>
</name>
<name>
<surname><![CDATA[Klemedtsson]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Methane uptake in Swedish forest soil in relation to liming and extra N-deposition]]></article-title>
<source><![CDATA[Biol. Fert. Soils]]></source>
<year>1997</year>
<volume>25</volume>
<page-range>296-301</page-range></nlm-citation>
</ref>
<ref id="B31">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Lassey]]></surname>
<given-names><![CDATA[K.R]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Livestock methane emission and its perspective in the global methane cycle]]></article-title>
<source><![CDATA[Aust. J. Exp. Agr.]]></source>
<year>2008</year>
<volume>48</volume>
<page-range>114-8</page-range></nlm-citation>
</ref>
<ref id="B32">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Lê]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Husson]]></surname>
<given-names><![CDATA[J.J]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[FactoMineR: A Package for Multivariate Analysis]]></article-title>
<source><![CDATA[J. Stat. Softw.]]></source>
<year>2008</year>
<volume>25</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>1-18</page-range></nlm-citation>
</ref>
<ref id="B33">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Lee]]></surname>
<given-names><![CDATA[S.W]]></given-names>
</name>
<name>
<surname><![CDATA[Im]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[DiSpirito]]></surname>
<given-names><![CDATA[A.A]]></given-names>
</name>
<name>
<surname><![CDATA[Bodrossy]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Barcelona]]></surname>
<given-names><![CDATA[M.J]]></given-names>
</name>
<name>
<surname><![CDATA[Semrau]]></surname>
<given-names><![CDATA[J.D]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Effect of nutrient and selective inhibitor amendments on methane oxidation, nitrous oxide production, and key gene presence and expression in landfill cover soils: characterization of the role of methanotrophs, nitrifiers, and denitrifiers.]]></article-title>
<source><![CDATA[Appl. Microbiol. Biotechnol.]]></source>
<year>2009</year>
<volume>85</volume>
<page-range>389-403</page-range></nlm-citation>
</ref>
<ref id="B34">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Li]]></surname>
<given-names><![CDATA[X]]></given-names>
</name>
<name>
<surname><![CDATA[He]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Yuan]]></surname>
<given-names><![CDATA[W]]></given-names>
</name>
<name>
<surname><![CDATA[Li]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Xu]]></surname>
<given-names><![CDATA[W]]></given-names>
</name>
<name>
<surname><![CDATA[Liu]]></surname>
<given-names><![CDATA[W]]></given-names>
</name>
<name>
<surname><![CDATA[Wang]]></surname>
<given-names><![CDATA[Z]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Response of soil methane uptake to simulated nitrogen deposition and grazing management across three types of steppe in Inner Mongolia, China]]></article-title>
<source><![CDATA[Sci. Total Environ.]]></source>
<year>2018</year>
<volume>612</volume>
<page-range>799-808</page-range></nlm-citation>
</ref>
<ref id="B35">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Martínez-Atencia]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Loaiza-Usuga]]></surname>
<given-names><![CDATA[J.C.]]></given-names>
</name>
<name>
<surname><![CDATA[Osorio-Vega]]></surname>
<given-names><![CDATA[N.W.]]></given-names>
</name>
<name>
<surname><![CDATA[Correa-Londoño]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Casamitjana-Causa]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Leaf litter decomposition in diverse silvopastoral systems in a neotropical environment]]></article-title>
<source><![CDATA[J. Sustain. For.]]></source>
<year>2020</year>
<volume>2020</volume>
</nlm-citation>
</ref>
<ref id="B36">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Merino]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Pérez-Batallón]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[Macías]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Influencia del uso y manejo agrícola sobre la dinámica de CH4 del suelo en el norte de España]]></article-title>
<source><![CDATA[Edafología]]></source>
<year>2004</year>
<volume>11</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>207-19</page-range></nlm-citation>
</ref>
<ref id="B37">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Montenegro]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Abarca]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
</person-group>
<source><![CDATA[Fijación de carbono, emisión de metano y de óxido nitroso en sistemas de producción bovina en Costa Rica]]></source>
<year>2000</year>
<publisher-loc><![CDATA[Roma, ITA ]]></publisher-loc>
<publisher-name><![CDATA[FAO]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B38">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Mora]]></surname>
<given-names><![CDATA[M.A]]></given-names>
</name>
<name>
<surname><![CDATA[Ríos]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Ríos]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Almario Charry]]></surname>
<given-names><![CDATA[J.L]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Impacto de la actividad ganadera sobre el suelo en Colombia.]]></article-title>
<source><![CDATA[Ing. Región]]></source>
<year>2017</year>
<volume>17</volume>
<page-range>1-12</page-range></nlm-citation>
</ref>
<ref id="B39">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Murgueitio]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Retos y progresos de la ganadería sostenible]]></article-title>
<source><![CDATA[Agric. Sosten.]]></source>
<year>2011</year>
<volume>7</volume>
<page-range>45-54</page-range></nlm-citation>
</ref>
<ref id="B40">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Murgueitio]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Muhammad]]></surname>
<given-names><![CDATA[I]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Ganadería y medio ambiente en América Latina]]></article-title>
<source><![CDATA[Ganadería del futuro: Investigación para el desarrollo]]></source>
<year>2009</year>
<page-range>19-40</page-range></nlm-citation>
</ref>
<ref id="B41">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Nanba]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[King]]></surname>
<given-names><![CDATA[G.M]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Response of atmospheric methane consumption by maine forest soils to exogenous aluminum salts]]></article-title>
<source><![CDATA[Appl. Environ. Microbiol.]]></source>
<year>2000</year>
<volume>66</volume>
<page-range>3674-9</page-range></nlm-citation>
</ref>
<ref id="B42">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Pachauri]]></surname>
<given-names><![CDATA[R.K]]></given-names>
</name>
<name>
<surname><![CDATA[Meyer]]></surname>
<given-names><![CDATA[L.A]]></given-names>
</name>
<name>
<surname><![CDATA[Stocker]]></surname>
<given-names><![CDATA[T]]></given-names>
</name>
</person-group>
<source><![CDATA[Cambio climático 2014: Informe de síntesis. Contribución de los Grupos de Trabajo I. II y III al Quinto Informe de evaluación del panel intergubernamental sobre el cambio climático]]></source>
<year>2014</year>
<publisher-loc><![CDATA[Ginebra, CHE ]]></publisher-loc>
<publisher-name><![CDATA[IPCC]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B43">
<nlm-citation citation-type="journal">
<article-title xml:lang=""><![CDATA[Conservation agriculture and ecosystem services: An overview]]></article-title>
<source><![CDATA[Agric. Ecosyst. Environ.]]></source>
<year>2014</year>
<volume>187</volume>
<page-range>87-105</page-range></nlm-citation>
</ref>
<ref id="B44">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Pereyra]]></surname>
<given-names><![CDATA[V]]></given-names>
</name>
</person-group>
<source><![CDATA[Emisiones de metano y óxido nitroso en arrozales de la zona este del Uruguay: el manejo de cultivo como factor determinante.]]></source>
<year>2009</year>
<publisher-loc><![CDATA[Montevideo, URY ]]></publisher-loc>
<publisher-name><![CDATA[Repositorio Colibrí, Universidad de la República de Uruguay]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B45">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Pinheiro]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Bates]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[DebRoy]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Sarkar]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Core Team. 2018]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
</person-group>
<source><![CDATA[Nlme: linear and nonlinear mixed effects models. R package version 3.1-137]]></source>
<year>2018</year>
</nlm-citation>
</ref>
<ref id="B46">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[R Core Team. 2018]]></surname>
</name>
</person-group>
<source><![CDATA[R: A language and environment for statistical computing.]]></source>
<year>2018</year>
<edition>Versión 3.4.4.</edition>
<publisher-loc><![CDATA[Vienna, Austria ]]></publisher-loc>
<publisher-name><![CDATA[R Foundation for Statistical Computing]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B47">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rondón]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
</person-group>
<source><![CDATA[Land use and balances of greenhouse gases in Colombian Tropical savanna]]></source>
<year>2000</year>
<publisher-loc><![CDATA[NY, USA ]]></publisher-loc>
<publisher-name><![CDATA[Cornell University]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B48">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Reay]]></surname>
<given-names><![CDATA[D.S]]></given-names>
</name>
<name>
<surname><![CDATA[Smith]]></surname>
<given-names><![CDATA[A.K]]></given-names>
</name>
<name>
<surname><![CDATA[Hewitt]]></surname>
<given-names><![CDATA[N.C]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Methane: importance, sources and sinks]]></article-title>
<source><![CDATA[Greenhouse gas sinks]]></source>
<year>2007</year>
<page-range>143-51</page-range><publisher-loc><![CDATA[Wallingford, WA, USA, and Cambridge, GBR. ]]></publisher-loc>
<publisher-name><![CDATA[CABI]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B49">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ruser]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Schilling]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Steindl]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Flessa]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Beese]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Soil compaction and fertilization effects on nitrous oxide and methane fluxes in potato fields]]></article-title>
<source><![CDATA[Soil Sci. Soc. Am. J]]></source>
<year>1998</year>
<volume>62</volume>
<page-range>1587-95</page-range></nlm-citation>
</ref>
<ref id="B50">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sanhueza]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Methane, soil-vegetation-atmosphere fluxes in tropical ecosystems]]></article-title>
<source><![CDATA[Interciencia]]></source>
<year>2007</year>
<volume>32</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>31-4</page-range></nlm-citation>
</ref>
<ref id="B51">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sanhueza]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Cárdenas]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Donoso]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Santana]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Effect of plowing on CO2, CO, CH4, N2O, and NO fluxes from tropical savannah soils]]></article-title>
<source><![CDATA[J. Geophys. Res.]]></source>
<year>1994</year>
<volume>99</volume>
<page-range>16429-34</page-range></nlm-citation>
</ref>
<ref id="B52">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sanhueza]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Donoso]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Methane emission from tropical savannah Trachypogon sp. grasses.]]></article-title>
<source><![CDATA[Atmos. Chem. Physics]]></source>
<year>2006</year>
<volume>6</volume>
<page-range>5315-9</page-range></nlm-citation>
</ref>
<ref id="B53">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Scharffe]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Hao]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Donoso]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Crutzen]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Sanhueza]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Soil fluxes and atmospheric concentration of CO and CH4 in the northern part of the Guayana Shield, Venezuela]]></article-title>
<source><![CDATA[J. Geophys. Res.]]></source>
<year>1990</year>
<volume>95</volume>
<page-range>22475-80</page-range></nlm-citation>
</ref>
<ref id="B54">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sitaula]]></surname>
<given-names><![CDATA[B.K]]></given-names>
</name>
<name>
<surname><![CDATA[Sitaula]]></surname>
<given-names><![CDATA[J.I.B]]></given-names>
</name>
<name>
<surname><![CDATA[Aakra]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Bakken]]></surname>
<given-names><![CDATA[L.R]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Nitrification and methane oxidation in forest soil: acid deposition, nitrogen input and plant effects]]></article-title>
<source><![CDATA[Water Air Soil Poll.]]></source>
<year>2001</year>
<volume>130</volume>
<page-range>1061-6</page-range></nlm-citation>
</ref>
<ref id="B55">
<nlm-citation citation-type="book">
<collab>USDA</collab>
<source><![CDATA[Claves para la taxonomía de suelos]]></source>
<year>2014</year>
<edition>12</edition>
<publisher-loc><![CDATA[WA, USA. ]]></publisher-loc>
<publisher-name><![CDATA[USDA]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B56">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Thangarajan]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Bolan]]></surname>
<given-names><![CDATA[N.S]]></given-names>
</name>
<name>
<surname><![CDATA[Tian]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Naidu]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Kunhikrishnan]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Role of organic amendment application on greenhouse gas emission from soil]]></article-title>
<source><![CDATA[Sci. Total Environ.]]></source>
<year>2013</year>
<volume>465</volume>
<page-range>72-96</page-range></nlm-citation>
</ref>
<ref id="B57">
<nlm-citation citation-type="book">
<collab>US EPA (US Environmental Protection Agency). 2017. Inventory of US greenhouse gas emissions and sinks</collab>
<source><![CDATA[Inventory of US greenhouse gas emissions and sinks 1990-2015]]></source>
<year>2017</year>
<publisher-loc><![CDATA[USA ]]></publisher-loc>
<publisher-name><![CDATA[EPA]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B58">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Visscher]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Boeckx]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<name>
<surname><![CDATA[Van-Cleemput]]></surname>
<given-names><![CDATA[O.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Artificial methane sinks]]></article-title>
<source><![CDATA[Greenhouse gas sinks]]></source>
<year>2007</year>
<page-range>184-200</page-range><publisher-loc><![CDATA[Wallingford, WA, USA, and Cambridge, GBR ]]></publisher-loc>
<publisher-name><![CDATA[CABI]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B59">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Yang]]></surname>
<given-names><![CDATA[X]]></given-names>
</name>
<name>
<surname><![CDATA[Wang]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Xu]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Response of soil CH4 fluxes to stimulated nitrogen deposition in a temperate deciduous forest in northern China: A 5-year nitrogen addition experiment.]]></article-title>
<source><![CDATA[Eur. J. Soil Biol.]]></source>
<year>2017</year>
<volume>82</volume>
<page-range>43-9</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
