<?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>0377-9424</journal-id>
<journal-title><![CDATA[Agronomía Costarricense]]></journal-title>
<abbrev-journal-title><![CDATA[Agron. Costarricense]]></abbrev-journal-title>
<issn>0377-9424</issn>
<publisher>
<publisher-name><![CDATA[Universidad de Costa Rica. Colegio de Ingenieros y Agrónomos. Ministerio de Agricultura y Ganadería]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0377-94242023000100101</article-id>
<article-id pub-id-type="doi">10.15517/rac.v47i1.53968</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Efecto del balanceo de cargas en los ejes de tractores agrícolas sobre la eficiencia de labranza y las propiedades físico-mecánicas de un suelo vertisol]]></article-title>
<article-title xml:lang="en"><![CDATA[Effect of agricultural tractor axle load balancing on tillage efficiency and the soil physical and mechanical properties of a vertisol]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Villagra-Mendoza]]></surname>
<given-names><![CDATA[Karolina]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Brenes-Cano]]></surname>
<given-names><![CDATA[Daniela]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gómez-Calderón]]></surname>
<given-names><![CDATA[Natalia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Tecnológico de Costa Rica Escuela de Ingeniería Agrícola ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Tecnológico de Costa Rica  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Instituto Tecnológico de Costa Rica Escuela de Ingeniería Agrícola ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Costa Rica</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2023</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2023</year>
</pub-date>
<volume>47</volume>
<numero>1</numero>
<fpage>101</fpage>
<lpage>121</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S0377-94242023000100101&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S0377-94242023000100101&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S0377-94242023000100101&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Introducción. Debido a la alta tasa de degradación del suelo a nivel mundial, se requiere encontrar prácticas agrícolas que promuevan la conservación de suelos. Objetivo. Evaluar el balanceo estático de cargas de un tractor dedicado a la labranza, por medio de diferentes distribuciones de contrapesos en sus ejes, para mejorar las propiedades físicas, mecánicas e hidráulicas y la eficiencia de operación en un suelo vertisol. Materiales y métodos. Se plantearon 3 balanceos de cargas diferentes en los ejes delantero y trasero 40-60%, 30-70% y 50-50%; mediante la adición de contrapesos en el eje trasero del tractor. Se realizaron muestreos de campo a una profundidad de 15 cm en 3 etapas de muestreo (antes de mecanizar, inmediatamente y 2 meses después de mecanizar) en un vertisol con cultivo de pasto (Digitaria decumbens Stent). Se analizaron las variables de contenido de humedad del suelo, densidad aparente, límites plásticos, resistencia a la penetración del suelo, así como las necesidades hídricas del cultivo de acuerdo con los tratamientos. Además, se determinaron variables de operación y eficiencia, tales como profundidad de labranza, patinaje, consumo de combustible y fricción. Se analizaron las diferencias de las variables entre los tratamientos y entre etapas de muestreo con el fin de determinar el tratamiento con la menor afectación a las propiedades del suelo y mayor eficiencia de operación. Resultados. Se encontraron diferencias significativas entre los balanceos de carga por eje evaluados para todas las propiedades del suelo analizadas, excepto en el contenido de humedad. El balanceo 30-70% presentó los valores más bajos de consumo de combustible y de agua para el riego, patinaje, resistencia al corte y resistencia a la penetración. Conclusiones. El balanceo 30-70% se considera ideal para mecanizar bajo las condiciones estudiadas. No se recomienda mecanizar con el balanceo 50-50%, ya que la profundidad de labranza y los cambios en las propiedades del suelo fueron en detrimento de algunas propiedades del mismo.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Introduction. Due to the high worldwide rate of soil degradation, it is necessary to look for agricultural practices that promote soil conservation. Objective. To assess the tractor axle load balancing dedicated to tillage, through different counterweights distributions, to improve the physical, mechanical, and hydraulic properties of a vertisol and the efficiency of tillage operation. Materials and methods. Three different load balances were set on the front and rear axles, being 40-60%, 30-70% and 50-50%, by adding counterweights to the rear axle of the tractor. Field samples were taken at a depth of 15 cm in 3 sampling stages (before, immediately and 2 months after tillage), in a grass (Digitaria decumbens Stent) cultivated lot. Soil water content, bulk density, plastic limits, soil penetration resistance, as well as the water needs of the crop according to the treatments were analyzed. In addition, operation and efficiency variables were determined, such as tillage depth, slippage, fuel consumption, friction, and tractor power required. The differences of the variables between the treatments and sampling stages were analyzed to determine the treatment with the least impact to the soil properties and greater efficiency of operation. Results. Significant differences were found between balances in all the soil properties analyzed, except in the soil water content. The balance 30-70% presented the lowest values of fuel and water consumption for irrigation of the grass crop, wheel slippage, shear stress and penetration resistance. Conclusions. The balance treatment of 30-70% was considered as the best treatment under the studied conditions. Tillage with the treatment 50-50% was not recommended since tillage depth and soil property changes between sampling stages affected negatively to some soil properties.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Balanceo de cargas]]></kwd>
<kwd lng="es"><![CDATA[consumo de combustible]]></kwd>
<kwd lng="es"><![CDATA[maquinaria agrícola]]></kwd>
<kwd lng="es"><![CDATA[patinaje]]></kwd>
<kwd lng="es"><![CDATA[peso del tractor]]></kwd>
<kwd lng="es"><![CDATA[profundidad de labranza]]></kwd>
<kwd lng="es"><![CDATA[propiedades del suelo]]></kwd>
<kwd lng="es"><![CDATA[velocidad de avance]]></kwd>
<kwd lng="en"><![CDATA[Ballast]]></kwd>
<kwd lng="en"><![CDATA[fuel consumption]]></kwd>
<kwd lng="en"><![CDATA[agricultural machinery]]></kwd>
<kwd lng="en"><![CDATA[slippage]]></kwd>
<kwd lng="en"><![CDATA[tractor weight]]></kwd>
<kwd lng="en"><![CDATA[tillage depth]]></kwd>
<kwd lng="en"><![CDATA[soil properties]]></kwd>
<kwd lng="en"><![CDATA[tillage speed]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Abrol]]></surname>
<given-names><![CDATA[V]]></given-names>
</name>
<name>
<surname><![CDATA[Sharma]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
</person-group>
<source><![CDATA[Resource management for sustainable agriculture]]></source>
<year>2012</year>
<publisher-loc><![CDATA[London, United Kingdom ]]></publisher-loc>
<publisher-name><![CDATA[IntechOpen]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B2">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Alam]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[Islam]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Salahin]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
<name>
<surname><![CDATA[Hasanuzzaman]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Effect of tillage practices on soil properties and crop productivity in wheat-mungbean-rice cropping system under subtropical climatic conditions.]]></article-title>
<source><![CDATA[The Scientific World Journal]]></source>
<year>2014</year>
<volume>2014</volume>
<page-range>1-15</page-range></nlm-citation>
</ref>
<ref id="B3">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Al-Mastawi]]></surname>
<given-names><![CDATA[KE]]></given-names>
</name>
<name>
<surname><![CDATA[Dahham]]></surname>
<given-names><![CDATA[GA]]></given-names>
</name>
<name>
<surname><![CDATA[Yahya]]></surname>
<given-names><![CDATA[LM.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Effects of soil moisture content, tire inflation pressure, and tillage speed on tractive performance of 2WD tractor in Northern Iraq.]]></article-title>
<source><![CDATA[Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery]]></source>
<year>2022</year>
<volume>53</volume>
<numero>8</numero>
<issue>8</issue>
</nlm-citation>
</ref>
<ref id="B4">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Almaliki]]></surname>
<given-names><![CDATA[SA]]></given-names>
</name>
<name>
<surname><![CDATA[Himoud]]></surname>
<given-names><![CDATA[MS]]></given-names>
</name>
<name>
<surname><![CDATA[Muhsin]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Mathematical model for evaluating slippage of tractor under various field conditions.]]></article-title>
<source><![CDATA[Basrah Journal of Agricultural Sciencies]]></source>
<year>2021</year>
<volume>34</volume>
<page-range>49-59</page-range></nlm-citation>
</ref>
<ref id="B5">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Al-Talabani]]></surname>
<given-names><![CDATA[JHN]]></given-names>
</name>
<name>
<surname><![CDATA[Al-Sammarraie]]></surname>
<given-names><![CDATA[MAJ.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The effect of plowing and pulverization systems on some plant indicators of onion.]]></article-title>
<source><![CDATA[Plant Arch.]]></source>
<year>2021</year>
<volume>21</volume>
<page-range>851-3</page-range></nlm-citation>
</ref>
<ref id="B6">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Alvarado]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<source><![CDATA[Maquinaria y mecanización agrícola.]]></source>
<year>2011</year>
<page-range>570</page-range><publisher-loc><![CDATA[San José, Costa Rica ]]></publisher-loc>
<publisher-name><![CDATA[Editorial Universidad Estatal a Distancia.]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B7">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Amancha]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
</person-group>
<source><![CDATA[Determinación de la permeabilidad de los suelos basados en la metodología del infiltrómetro de mini disco en la Zona de Yanahurco, Napo.]]></source>
<year>2015</year>
<page-range>p. 97</page-range><publisher-loc><![CDATA[Quito, Ecuador ]]></publisher-loc>
<publisher-name><![CDATA[Universidad Central del Ecuador.]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B8">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Arvidsson]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Subsoil compaction caused by heavy sugarbeet harvesters in southern Sweden: I. Soil physical properties and crop yield in six field experiments.]]></article-title>
<source><![CDATA[Soil and Tillage Research]]></source>
<year>2001</year>
<volume>60</volume>
<page-range>67-78</page-range></nlm-citation>
</ref>
<ref id="B9">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ashburner]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Sims]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
</person-group>
<source><![CDATA[Elementos de diseño del tractor y herramientas de labranza]]></source>
<year>1984</year>
</nlm-citation>
</ref>
<ref id="B10">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Battiato]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Alaoui]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Diserens]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Impact of normal and shear stresses due to wheel slip on hydrological properties of an agricultural clay loam: experimental and new computerized approach.]]></article-title>
<source><![CDATA[Agricultural Science]]></source>
<year>2015</year>
<volume>7</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>1-19.</page-range></nlm-citation>
</ref>
<ref id="B11">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Baver]]></surname>
<given-names><![CDATA[LD]]></given-names>
</name>
<name>
<surname><![CDATA[Gardner]]></surname>
<given-names><![CDATA[WH]]></given-names>
</name>
<name>
<surname><![CDATA[Gardner]]></surname>
<given-names><![CDATA[WR.]]></given-names>
</name>
</person-group>
<source><![CDATA[Soil physics]]></source>
<year>1972</year>
<publisher-name><![CDATA[USA, John Wiley &amp; Sons]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B12">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Beer]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Russell Johnston]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[DeWolf]]></surname>
<given-names><![CDATA[JT]]></given-names>
</name>
<name>
<surname><![CDATA[Mazurek]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
</person-group>
<source><![CDATA[Mecánica de materiales.]]></source>
<year>2009</year>
<page-range>788</page-range><publisher-loc><![CDATA[New York, USA ]]></publisher-loc>
<publisher-name><![CDATA[McGraw-Hill.]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B13">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bhushan]]></surname>
<given-names><![CDATA[LS]]></given-names>
</name>
<name>
<surname><![CDATA[Ghildyal]]></surname>
<given-names><![CDATA[BP.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Influence of radius of curvature of moldboard on soil structure.]]></article-title>
<source><![CDATA[Agricultural Science s]]></source>
<year>1972</year>
<volume>42</volume>
<page-range>1-5</page-range></nlm-citation>
</ref>
<ref id="B14">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Blume]]></surname>
<given-names><![CDATA[HP]]></given-names>
</name>
<name>
<surname><![CDATA[Brummer]]></surname>
<given-names><![CDATA[GW]]></given-names>
</name>
<name>
<surname><![CDATA[Horn]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Kandeler]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Kögel-Knabner]]></surname>
<given-names><![CDATA[I]]></given-names>
</name>
<name>
<surname><![CDATA[Kretzschmar]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Stahr]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[Wilke]]></surname>
<given-names><![CDATA[BM.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Scheffer/Schachtschabel.]]></article-title>
<source><![CDATA[Lehrbuch der Bodenkunde]]></source>
<year>2010</year>
<volume>16</volume>
<page-range>123-74</page-range></nlm-citation>
</ref>
<ref id="B15">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Cadena]]></surname>
<given-names><![CDATA[B]]></given-names>
</name>
<name>
<surname><![CDATA[Egas]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Ruiz]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Mosquera]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Benavides]]></surname>
<given-names><![CDATA[O.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Efecto de cinco sistemas de labranza, en la erosión de un suelo vitric haplustand, bajo cultivo de papa (Solanum tuberosum L)]]></article-title>
<source><![CDATA[Revista de Ciencias Agrícolas]]></source>
<year>2012</year>
<volume>29</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>116-28</page-range></nlm-citation>
</ref>
<ref id="B16">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Casady]]></surname>
<given-names><![CDATA[W.]]></given-names>
</name>
</person-group>
<source><![CDATA[Tractor tire and ballast management.]]></source>
<year>1997</year>
<publisher-loc><![CDATA[University of Missouri Extension, Columbia, USA. ]]></publisher-loc>
<publisher-name><![CDATA[Agricultural MU Guide]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B17">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Dexter]]></surname>
<given-names><![CDATA[AR]]></given-names>
</name>
<name>
<surname><![CDATA[Bird]]></surname>
<given-names><![CDATA[NRA.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Methods for predicting the optimum and the range of soil water contents for tillage based on the water retention curve.]]></article-title>
<source><![CDATA[Soil &amp; Tillage Research]]></source>
<year>2001</year>
<volume>57</volume>
<page-range>203-12</page-range></nlm-citation>
</ref>
<ref id="B18">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Donghwi]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[Boo Hyun]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
<name>
<surname><![CDATA[Heejung]]></surname>
<given-names><![CDATA[Y.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Effect of clay content on the shear strength of clay - sand mixture.]]></article-title>
<source><![CDATA[International Journal of Geo-Engineering]]></source>
<year>2018</year>
<volume>9</volume>
<numero>19</numero>
<issue>19</issue>
<page-range>1-12.</page-range></nlm-citation>
</ref>
<ref id="B19">
<nlm-citation citation-type="">
<collab>FAO</collab>
<source><![CDATA[Consistencia del suelo]]></source>
<year>2008</year>
</nlm-citation>
</ref>
<ref id="B20">
<nlm-citation citation-type="">
<collab>FAO</collab>
<source><![CDATA[World reference base for soil resources 2014: International soil classification system for naming soils and creating legends for soil maps]]></source>
<year>2015</year>
</nlm-citation>
</ref>
<ref id="B21">
<nlm-citation citation-type="">
<collab>FAO</collab>
<source><![CDATA[Status of the world's soil resources: main report]]></source>
<year>2015</year>
<page-range>650</page-range><publisher-loc><![CDATA[Rome, Italy ]]></publisher-loc>
</nlm-citation>
</ref>
<ref id="B22">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Fasinmirin]]></surname>
<given-names><![CDATA[JT.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Saturated hydraulic conductivity (K &#952; s) of a Sub-Tropical ultisol under different tillage systems]]></article-title>
<source><![CDATA[Proceedings of The International Academic Conference for Sub-Sahara African Transformation y Development,]]></source>
<year>2017</year>
</nlm-citation>
</ref>
<ref id="B23">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Fernández]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Goñi]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Relación entre el esfuerzo cortante del suelo y la resistencia a la penetración: su utilidad para diagnosticar la compactación del suelo.]]></article-title>
<source><![CDATA[Rev. de la Fac. de Agronomía - UNLPam,]]></source>
<year>2010</year>
<volume>21</volume>
</nlm-citation>
</ref>
<ref id="B24">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gómez]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
<name>
<surname><![CDATA[Villagra]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[Solórzano]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Patinaje de tractor con dos Implementos de Labranza en dos tipos de suelo en Costa Rica]]></article-title>
<source><![CDATA[Congreso Latinoamericano de la Ciencia del Suelo.]]></source>
<year>2016</year>
<publisher-loc><![CDATA[Quito, Ecuador ]]></publisher-loc>
</nlm-citation>
</ref>
<ref id="B25">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gómez]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
<name>
<surname><![CDATA[Villagra]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[Solórzano]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<source><![CDATA[Cuantificación de la erosión hídrica en función de diferentes técnicas de mecanización para minimizar la contaminación del agua por sedimentos en la parte alta de la Cuenca del Río Reventazón]]></source>
<year>2017</year>
<page-range>115</page-range><publisher-loc><![CDATA[Cartago, Costa Rica ]]></publisher-loc>
<publisher-name><![CDATA[Instituto Tecnológico de Costa Rica.]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B26">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gómez-Calderón]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
<name>
<surname><![CDATA[Rodríguez-Yáñez]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Degradación del suelo por compactación en función de la distribución del peso en los ejes de los tractores agrícolas.]]></article-title>
<source><![CDATA[Yulök Revista de Innovación Académica]]></source>
<year>2020</year>
<volume>3</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>44-50</page-range></nlm-citation>
</ref>
<ref id="B27">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gómez-Calderón]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
<name>
<surname><![CDATA[Villagra-Mendoza]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[Solórzano-Quintana]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[La labranza mecanizada y su impacto en la conservación del suelo.]]></article-title>
<source><![CDATA[Revista Tecnología en Marcha]]></source>
<year>2018</year>
<volume>31</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>170</page-range></nlm-citation>
</ref>
<ref id="B28">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[González-Cervantes]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[González-Barrios]]></surname>
<given-names><![CDATA[JL]]></given-names>
</name>
<name>
<surname><![CDATA[Chávez-Ramírez]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Porosidad del suelo en tres superficies típicas de la cuenca alta del río Nazas]]></article-title>
<source><![CDATA[Tecnología y ciencias del agua]]></source>
<year>2012</year>
<volume>3</volume>
<page-range>21-32</page-range></nlm-citation>
</ref>
<ref id="B29">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Hartge]]></surname>
<given-names><![CDATA[KH]]></given-names>
</name>
<name>
<surname><![CDATA[Horn]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<source><![CDATA[Essential soil Physics.]]></source>
<year>2016</year>
<publisher-loc><![CDATA[Stuttgart, Germany. ]]></publisher-loc>
<publisher-name><![CDATA[Schweizerbart Science Publishers]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B30">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Haruna]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Anderson]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Nsalambi]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
<name>
<surname><![CDATA[Syaharudin]]></surname>
<given-names><![CDATA[Z.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Soil hydraulic properties: influence of tillage and cover crops.]]></article-title>
<source><![CDATA[Pedosphere]]></source>
<year>2018</year>
<volume>28</volume>
<page-range>430-42</page-range></nlm-citation>
</ref>
<ref id="B31">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Horton]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Horn]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Bachman]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Peth]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<source><![CDATA[Essential soil physics an introduction to soil processes, functions, structure and mechanics.]]></source>
<year>2016</year>
<page-range>391</page-range><publisher-loc><![CDATA[Sttutgart ]]></publisher-loc>
<publisher-name><![CDATA[Germany,Schweizerbart Science Publishers.]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B32">
<nlm-citation citation-type="">
<collab>INTA</collab>
<source><![CDATA[Suelos de Costa Rica orden vertisol.]]></source>
<year>2015</year>
<publisher-loc><![CDATA[San José, Costa Rica ]]></publisher-loc>
</nlm-citation>
</ref>
<ref id="B33">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Jadhav]]></surname>
<given-names><![CDATA[PP]]></given-names>
</name>
<name>
<surname><![CDATA[Sharma]]></surname>
<given-names><![CDATA[AK]]></given-names>
</name>
<name>
<surname><![CDATA[Wandkar]]></surname>
<given-names><![CDATA[SV]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Study of tractive efficiency as an effect of ballast and tire inflation pressure in sandy loam soil.]]></article-title>
<source><![CDATA[Agric Eng Int: CIGR Journal]]></source>
<year>2013</year>
<volume>15</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>60-7</page-range></nlm-citation>
</ref>
<ref id="B34">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Jorajuria]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Draghi]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Sobrecompactación del suelo agrícola. Parte I: Influencia diferencial del peso y del número de pasadas. Rev]]></article-title>
<source><![CDATA[Bras. Eng. Agríc. Ambient]]></source>
<year>2000</year>
<volume>4</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>445-52</page-range></nlm-citation>
</ref>
<ref id="B35">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Keller]]></surname>
<given-names><![CDATA[T]]></given-names>
</name>
<name>
<surname><![CDATA[Dexter]]></surname>
<given-names><![CDATA[AR.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Plastic limits of agricultural soils as functions of soil texture and organic matter content.]]></article-title>
<source><![CDATA[Soil Research]]></source>
<year>2012</year>
<volume>50</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>7</page-range></nlm-citation>
</ref>
<ref id="B36">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Kirchhof]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Plastic properties]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Lal]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
</person-group>
<source><![CDATA[Encyclopedia of Soil Science]]></source>
<year>2006</year>
<page-range>1311-3</page-range><publisher-loc><![CDATA[New York, USA ]]></publisher-loc>
<publisher-name><![CDATA[Taylor &amp; Francis]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B37">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Koola]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Tongb]]></surname>
<given-names><![CDATA[B]]></given-names>
</name>
<name>
<surname><![CDATA[Tianc]]></surname>
<given-names><![CDATA[Z]]></given-names>
</name>
<name>
<surname><![CDATA[Heitmanc]]></surname>
<given-names><![CDATA[J. L]]></given-names>
</name>
<name>
<surname><![CDATA[Sauerd]]></surname>
<given-names><![CDATA[T. J]]></given-names>
</name>
<name>
<surname><![CDATA[Hortona]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Soil water retention and hydraulic conductivity dynamics following tillage.]]></article-title>
<source><![CDATA[Soil and Tillage Research]]></source>
<year>2019</year>
<volume>193</volume>
<page-range>95-100</page-range></nlm-citation>
</ref>
<ref id="B38">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Kuang]]></surname>
<given-names><![CDATA[B]]></given-names>
</name>
<name>
<surname><![CDATA[Mahmood]]></surname>
<given-names><![CDATA[HS]]></given-names>
</name>
<name>
<surname><![CDATA[Quraishi]]></surname>
<given-names><![CDATA[MZ]]></given-names>
</name>
<name>
<surname><![CDATA[Hoogmoed]]></surname>
<given-names><![CDATA[WB]]></given-names>
</name>
<name>
<surname><![CDATA[Mouazen]]></surname>
<given-names><![CDATA[AM]]></given-names>
</name>
<name>
<surname><![CDATA[Van Henten]]></surname>
<given-names><![CDATA[EJ.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Sensing soil properties in the laboratory, in situ, and on-line: A review.]]></article-title>
<source><![CDATA[Adv. Agron.]]></source>
<year>2012</year>
<volume>114</volume>
<page-range>155-223</page-range></nlm-citation>
</ref>
<ref id="B39">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Kulmatiski]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Beard]]></surname>
<given-names><![CDATA[KH]]></given-names>
</name>
<name>
<surname><![CDATA[Holdrege]]></surname>
<given-names><![CDATA[MC]]></given-names>
</name>
<name>
<surname><![CDATA[February]]></surname>
<given-names><![CDATA[EC.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Small differences in root distributions allow resource niche partitioning.]]></article-title>
<source><![CDATA[Ecology and Evolution]]></source>
<year>2020</year>
<volume>10</volume>
<numero>18</numero>
<issue>18</issue>
<page-range>9776-87</page-range></nlm-citation>
</ref>
<ref id="B40">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Legarda]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Puentes]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Benavides]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[mportancia de los parámetros hidrofísicos del suelo y requerimientos hídricos del cultivo en el diseño de un proyecto de riego por aspersión liviana]]></article-title>
<source><![CDATA[Revista de Ciencias Agrícolas]]></source>
<year>1999</year>
<volume>16</volume>
<numero>1-2</numero>
<issue>1-2</issue>
<page-range>98-109</page-range></nlm-citation>
</ref>
<ref id="B41">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Lyne]]></surname>
<given-names><![CDATA[PWL]]></given-names>
</name>
<name>
<surname><![CDATA[Burt]]></surname>
<given-names><![CDATA[EC]]></given-names>
</name>
<name>
<surname><![CDATA[Meiring]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Effect of tire and engine parameters on efficiency.]]></article-title>
<source><![CDATA[Transactions of ASABE]]></source>
<year>1984</year>
<volume>27</volume>
<page-range>5-7</page-range></nlm-citation>
</ref>
<ref id="B42">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Mahmood]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Subhi]]></surname>
<given-names><![CDATA[KA]]></given-names>
</name>
<name>
<surname><![CDATA[Rashid]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Effect of extra weight and tire pressure on fuel consumption and slippage ratio on tillage operation done in Al-Musain Area.]]></article-title>
<source><![CDATA[Soild State Technology]]></source>
<year>2020</year>
<volume>63</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>5278-87</page-range></nlm-citation>
</ref>
<ref id="B43">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Mamkagh]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Effect of soil moisture, tillage speed, depth, ballast weight and, used implement on wheel slippage of the tractor: A Review.]]></article-title>
<source><![CDATA[Asian Journal of Advances in Agricultural Research]]></source>
<year>2019</year>
<volume>9</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>1-7.</page-range></nlm-citation>
</ref>
<ref id="B44">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Mamkagh]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[. Effect of tillage speed, depth, ballast weight and tire inflation pressure on the fuel consumption of the agricultural tractor: A Review.]]></article-title>
<source><![CDATA[Journal of Engineering Research and Reports]]></source>
<year>2019</year>
<volume>3</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>1-7</page-range></nlm-citation>
</ref>
<ref id="B45">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Medina González]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[García Coronado]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Nuñez Acosta]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[El método del hidrómetro: base teórica para su empleo en la determinación de la distribución del tamaño de partículas de suelo]]></article-title>
<source><![CDATA[Revista Ciencias Técnicas Agropecuarias]]></source>
<year>2007</year>
<volume>16</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>19-24</page-range></nlm-citation>
</ref>
<ref id="B46">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Mohamed]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Effect of plowing conditions on the tractor wheel slippage and fuel consumption in sandy soil.]]></article-title>
<source><![CDATA[Chem Tech Research]]></source>
<year>2015</year>
<volume>8</volume>
<numero>12</numero>
<issue>12</issue>
<page-range>151-9</page-range></nlm-citation>
</ref>
<ref id="B47">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Moitzi]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Weingartmann]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Boxberger]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Effects of tillage systems and wheel slip on fuel consumption]]></article-title>
<source><![CDATA[Proceedings of Energy Efficiency and Agricultural Engineering - International Scientific Conference]]></source>
<year>2006</year>
<publisher-loc><![CDATA[Rousse, Bulgaria ]]></publisher-loc>
</nlm-citation>
</ref>
<ref id="B48">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Moitzi]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Wagentristl]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Refenner]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[Weingartmann]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Effects of working depth and wheel slip on fuel consumption of selected tillage implements]]></article-title>
<source><![CDATA[Agric Eng Int: CIGR Journal]]></source>
<year>2014</year>
<volume>16</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>182-90</page-range></nlm-citation>
</ref>
<ref id="B49">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Munkholm]]></surname>
<given-names><![CDATA[LJ]]></given-names>
</name>
<name>
<surname><![CDATA[Heck]]></surname>
<given-names><![CDATA[RJ]]></given-names>
</name>
<name>
<surname><![CDATA[Deen]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Soil pore characteristics assessed from X-ray micro- CT derived images and correlations to soil friability.]]></article-title>
<source><![CDATA[Geoderma]]></source>
<year>2012</year>
<volume>181-182</volume>
<page-range>22-9</page-range></nlm-citation>
</ref>
<ref id="B50">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Pravin]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Effect of ballast and tyre inflation pressure on the performance of agricultural tractor for primary tillage operations in sandy loam soil.]]></source>
<year>2012</year>
<publisher-loc><![CDATA[Udaipur, India ]]></publisher-loc>
<publisher-name><![CDATA[Maharana Pratap University of Agriculture and Technology]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B51">
<nlm-citation citation-type="book">
<collab>R Core Team.</collab>
<source><![CDATA[R: A language and environment for statistical computing.]]></source>
<year>2022</year>
<publisher-loc><![CDATA[Vienna, Austria. ]]></publisher-loc>
<publisher-name><![CDATA[R Foundation for Statistical Computing]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B52">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rucks]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[García]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Kaplán]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Ponce de León]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Hill]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<source><![CDATA[Propiedades físicas de los suelos]]></source>
<year>2004</year>
<page-range>78</page-range><publisher-loc><![CDATA[Montevideo ]]></publisher-loc>
<publisher-name><![CDATA[Uruguay. Universidad de la República.]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B53">
<nlm-citation citation-type="book">
<collab>Soil Survey Staff.</collab>
<source><![CDATA[Soil survey field and laboratory methods manual.]]></source>
<year>2018</year>
<publisher-loc><![CDATA[Natural Resources Conservation Service. ]]></publisher-loc>
<publisher-name><![CDATA[U.S. Department of Agriculture]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B54">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Solano]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Villalobos]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<source><![CDATA[Regiones y subregiones climáticas de Costa Rica]]></source>
<year>2021</year>
<page-range>32</page-range><publisher-name><![CDATA[Instituto Meteorológico Nacional, Gestión de Desarrollo.]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B55">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Stone]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Gulvin]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
</person-group>
<source><![CDATA[Maquinaria agrícola.]]></source>
<year>1987</year>
<page-range>693</page-range><publisher-loc><![CDATA[México D.F., México ]]></publisher-loc>
<publisher-name><![CDATA[Compañía Editorial Continental.]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B56">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ten Damme]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Schjonning]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Munkholm]]></surname>
<given-names><![CDATA[LJ]]></given-names>
</name>
<name>
<surname><![CDATA[Green]]></surname>
<given-names><![CDATA[O]]></given-names>
</name>
<name>
<surname><![CDATA[Nielsen]]></surname>
<given-names><![CDATA[SK]]></given-names>
</name>
<name>
<surname><![CDATA[Lamandé]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Soil structure response to field traffic: effects of traction and repeated wheeling.]]></article-title>
<source><![CDATA[Soil &amp; Tillage Research]]></source>
<year>2021</year>
<volume>213</volume>
<page-range>105-28</page-range></nlm-citation>
</ref>
<ref id="B57">
<nlm-citation citation-type="book">
<collab>USDA</collab>
<source><![CDATA[Soil quality test kit guide.]]></source>
<year>2001</year>
<publisher-loc><![CDATA[DC. ]]></publisher-loc>
<publisher-name><![CDATA[USDA Soil Quality Institute. Washington]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B58">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Veiga]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Reinert]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Reichert]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Kaiser]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Short and long-term effects of tillage systems and nutrient sources on soil physical properties of a Southern Brazilian hapludox.]]></article-title>
<source><![CDATA[Rev Bras Cienc. Solo]]></source>
<year>2008</year>
<volume>32</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>1437-1446.</page-range></nlm-citation>
</ref>
<ref id="B59">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Verruijt]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<source><![CDATA[An introduction to soil mechanics]]></source>
<year>2018</year>
<publisher-loc><![CDATA[Delft, Holanda ]]></publisher-loc>
<publisher-name><![CDATA[Springer.]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B60">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Villagra-Mendoza]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[Horn]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Effect of biochar addition on hydraulic functions of two textural soils.]]></article-title>
<source><![CDATA[Geoderma]]></source>
<year>2018</year>
<volume>326</volume>
<page-range>88-95</page-range></nlm-citation>
</ref>
<ref id="B61">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Zerpa]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Sosa]]></surname>
<given-names><![CDATA[O]]></given-names>
</name>
<name>
<surname><![CDATA[Berardi]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Bolatti]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[La resistencia mecánica a la penetración en pasturas.]]></article-title>
<source><![CDATA[Agromensajes]]></source>
<year>2013</year>
<volume>35</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>64-8</page-range></nlm-citation>
</ref>
<ref id="B62">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Zimmermann]]></surname>
<given-names><![CDATA[I]]></given-names>
</name>
<name>
<surname><![CDATA[Horn]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Impact of sample pretreatment on the results of texture analysis in different soils.]]></article-title>
<source><![CDATA[Geoderma]]></source>
<year>2020</year>
<volume>371</volume>
<page-range>114379</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
