<?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>0258-5936</journal-id>
<journal-title><![CDATA[Cultivos Tropicales]]></journal-title>
<abbrev-journal-title><![CDATA[cultrop]]></abbrev-journal-title>
<issn>0258-5936</issn>
<publisher>
<publisher-name><![CDATA[Ediciones INCA]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0258-59362019000300002</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Propiedades biológicas, ácidos húmicos y metales pesados biodisponibles en suelo Ferralítico bajo diferentes usos agrícolas]]></article-title>
<article-title xml:lang="en"><![CDATA[Biological properties, humic acids and heavy metals availability in Ferralitic soil under differents agricultural uses]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Reyes-Rodríguez]]></surname>
<given-names><![CDATA[Reinaldo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Guridi-Izquierdo]]></surname>
<given-names><![CDATA[Fernando]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Valdés-Carmenate]]></surname>
<given-names><![CDATA[Ramiro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cartaya-Rubio]]></surname>
<given-names><![CDATA[Omar]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Agraria de la Habana &#8220;Fructuoso Rodríguez Perez&#8221;  ]]></institution>
<addr-line><![CDATA[San José de las Lajas Mayabeque]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Nacional de Ciencias Agrícolas (INCA)  ]]></institution>
<addr-line><![CDATA[San José de las Lajas Mayabeque]]></addr-line>
<country>Cuba</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2019</year>
</pub-date>
<volume>40</volume>
<numero>3</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S0258-59362019000300002&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S0258-59362019000300002&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S0258-59362019000300002&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN Las propiedades biológicas y la materia orgánica del suelo pueden reflejar el desequilibrio de un determinado ambiente, la sustentabilidad de las prácticas agrícolas y predecir procesos de contaminación. El objetivo de este trabajo fue evaluar el efecto de tres usos agrícolas diferentes (frutales, caña de azúcar y papa) en suelo Ferralítico Rojo hidratado, sobre las propiedades biológicas respiración basal, masa microbiana y el cociente metabólico. También se evaluó el carbono orgánico, así como el coeficiente óptico E4/E6, el umbral de coagulación y el contenido de grupos funcionales ácidos en los ácidos húmicos extraídos de esos suelos. Además, se determinó el contenido pseudototal de cationes de metales pesados Cd2+, Cu2+, Ni2+, Pb2+ y Zn2+. Los resultados demostraron que los usos de caña de azúcar y de papa, mostraron los valores más bajos de respiración basal y masa microbiana, con elevado cociente metabólico, lo que indica un efecto desfavorable de la intensidad de las prácticas agrícolas empleadas sobre la microbiota edáfica. El carbono orgánico mostró diferencias significativas entre los manejos. En los ácidos húmicos se detectaron modificaciones estructurales, reflejadas en el umbral de coagulación y en el coeficiente óptico E4 /E6, así como en el contenido de grupos funcionales ácidos. Los contenidos pseudototales de metales pesados fueron superiores en los usos de mayor cantidad de actividades culturales, especialmente en el correspondiente al cultivo de la papa, donde el Cd2+ se encuentra en concentraciones relativamente elevadas, lo cual constituye un riesgo, dado su bajo límite de tolerancia en alimentos.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT The biological properties and the organic matter of the soil can reflect the imbalance of a certain atmosphere, the sustainability of the agricultural practices and to predict processes of contamination. The objective of this work was to evaluate the effect of three different agricultural uses (fruit-bearing, cane of sugar and potato) in soil moisturized Red Ferralitic, on the properties biological basal breathing, microbial mass and the metabolic quotient. The organic carbon was also evaluated, as well as the optic coefficient E4/E6, the threshold of clotting and the content of groups functional acids in the sour extracted humic of those soils. Also, the contained pseudototal of cations of heavy metals was determined Cd2++, Cu2++, Ni2++, Pb2+and Zn2+. The results demonstrated that the uses of cane of sugar and of potato, they showed the lowest values in basal breathing and microbial mass, with high metabolic quotient, what indicates an unfavorable effect of the intensity of the practices agricultural employees on the microbiota edaphic. The organic carbon showed significant differences among the management. In the humic acids structural modifications were detected, reflected in the threshold of clotting and in the optic coefficient E4 /E6, as well as in the content of groups functional acids. The contained pseudototal of heavy metals was superior in the uses of bigger quantity of cultural activities, especially in the corresponding to the cultivation of the potato, where the Cd2+is in relatively high concentrations, that which constitutes a given risk its low limit of tolerance in foods.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[prácticas agronómicas]]></kwd>
<kwd lng="es"><![CDATA[microorganismos]]></kwd>
<kwd lng="es"><![CDATA[materia orgánica]]></kwd>
<kwd lng="es"><![CDATA[degradación]]></kwd>
<kwd lng="en"><![CDATA[agronomic practices]]></kwd>
<kwd lng="en"><![CDATA[microorganisms]]></kwd>
<kwd lng="en"><![CDATA[organic matter]]></kwd>
<kwd lng="en"><![CDATA[degradation]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<label>1</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Espinoza]]></surname>
<given-names><![CDATA[IDN]]></given-names>
</name>
<name>
<surname><![CDATA[Zenteno]]></surname>
<given-names><![CDATA[MDC]]></given-names>
</name>
<name>
<surname><![CDATA[Chávez]]></surname>
<given-names><![CDATA[JC]]></given-names>
</name>
<name>
<surname><![CDATA[Moreiral]]></surname>
<given-names><![CDATA[VN]]></given-names>
</name>
<name>
<surname><![CDATA[Solarte]]></surname>
<given-names><![CDATA[KEA]]></given-names>
</name>
<name>
<surname><![CDATA[Intriago]]></surname>
<given-names><![CDATA[FLM]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Propiedades físicas del suelo en diferentes sistemas agrícolas en la provincia de Los Ríos, Ecuador]]></article-title>
<source><![CDATA[Temas agrarios]]></source>
<year>2018</year>
<volume>23</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>177-87</page-range></nlm-citation>
</ref>
<ref id="B2">
<label>2</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rivero Herrada]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Evaluación de atributos biológicos de un suelo latosol bajo producción agroecológica]]></article-title>
<collab>Remigio Gaibor Fernández R.Mozena Leandro W.Petrônio de Brito Ferreira E.Maris Ferraresi T.Reyes Pérez JJ</collab>
<source><![CDATA[Centro Agrícola]]></source>
<year>2016</year>
<volume>43</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>14-20</page-range></nlm-citation>
</ref>
<ref id="B3">
<label>3</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Paolini Gómez]]></surname>
<given-names><![CDATA[JE]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Actividad microbiológica y biomasa microbiana en suelos cafetaleros de los Andes venezolanos]]></article-title>
<source><![CDATA[Terra Latinoamericana]]></source>
<year>2018</year>
<volume>36</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>13-22</page-range></nlm-citation>
</ref>
<ref id="B4">
<label>4</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Vásquez]]></surname>
<given-names><![CDATA[JR]]></given-names>
</name>
<name>
<surname><![CDATA[Schellekens]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Kaal]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Composición de la materia orgánica en los suelos de seis zonas edafoclimáticas del Magdalena (Colombia)]]></article-title>
<source><![CDATA[Spanish Journal of Soil Science]]></source>
<year>2015</year>
<volume>5</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>243-58</page-range></nlm-citation>
</ref>
<ref id="B5">
<label>5</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Moreno]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[González]]></surname>
<given-names><![CDATA[MI]]></given-names>
</name>
<name>
<surname><![CDATA[Egido]]></surname>
<given-names><![CDATA[JA]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Influencia del manejo sobre la calidad del suelo]]></article-title>
<source><![CDATA[ECUADOR ES CALIDAD: Revista Científica Ecuatoriana]]></source>
<year>2015</year>
<volume>2</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>33-40</page-range></nlm-citation>
</ref>
<ref id="B6">
<label>6</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Hernández Jiménez]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Pérez Jiménez]]></surname>
<given-names><![CDATA[JM]]></given-names>
</name>
<name>
<surname><![CDATA[Bosch Infante]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Castro Speck]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
</person-group>
<source><![CDATA[Clasificación de los suelos de Cuba 2015]]></source>
<year>2015</year>
<page-range>93</page-range><publisher-name><![CDATA[Instituto Nacional de Ciencias Agrícolas (INCA)/Instituto de Suelos]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B7">
<label>7</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Durango]]></surname>
<given-names><![CDATA[W]]></given-names>
</name>
<name>
<surname><![CDATA[Uribe]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Henríquez]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Mata]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Respiración, biomasa microbiana y actividad fosfatasa del suelo en dos agroecosistemas y un bosque en Turrialba, Costa Rica]]></article-title>
<source><![CDATA[Agronomía costarricense]]></source>
<year>2015</year>
<volume>39</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>37-46</page-range></nlm-citation>
</ref>
<ref id="B8">
<label>8</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Vance]]></surname>
<given-names><![CDATA[ED]]></given-names>
</name>
<name>
<surname><![CDATA[Brookes]]></surname>
<given-names><![CDATA[PC]]></given-names>
</name>
<name>
<surname><![CDATA[Jenkinson]]></surname>
<given-names><![CDATA[DS]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Microbial biomass measurements in forest soils the use of the chloroform fumigation-incubation method in strongly acid soils]]></article-title>
<source><![CDATA[Soil Biology and Biochemistry]]></source>
<year>1987</year>
<volume>19</volume>
<numero>6</numero>
<issue>6</issue>
<page-range>697-702</page-range></nlm-citation>
</ref>
<ref id="B9">
<label>9</label><nlm-citation citation-type="confpro">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Perminova]]></surname>
<given-names><![CDATA[IV]]></given-names>
</name>
<name>
<surname><![CDATA[Kulikova]]></surname>
<given-names><![CDATA[NA]]></given-names>
</name>
</person-group>
<source><![CDATA[From Molecular Understanding to Innovative Applications of Humic Sustances Society]]></source>
<year>2008</year>
<conf-name><![CDATA[ 14International Meeting September]]></conf-name>
<conf-loc> </conf-loc>
<page-range>59-63</page-range></nlm-citation>
</ref>
<ref id="B10">
<label>10</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Canellas]]></surname>
<given-names><![CDATA[LP]]></given-names>
</name>
<name>
<surname><![CDATA[Santos]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
</person-group>
<source><![CDATA[Humosfera: Tratado Premilinar Sobre a Química das Substâncias Húmicas/Luciano Pasqualoto Canellas e Gabriel Araújo Santos]]></source>
<year>2005</year>
<publisher-loc><![CDATA[Campos dos Goytacazes ]]></publisher-loc>
<publisher-name><![CDATA[Santos]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B11">
<label>11</label><nlm-citation citation-type="book">
<collab>Standardization IO for</collab>
<source><![CDATA[Soil quality-Extraction of trace elements soluble in aqua regia]]></source>
<year>1995</year>
<publisher-name><![CDATA[ISO]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B12">
<label>12</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Kabata]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
</person-group>
<source><![CDATA[Trace elements in soils and plants]]></source>
<year>2011</year>
<edition>4</edition>
<publisher-loc><![CDATA[Boca Raton ]]></publisher-loc>
<publisher-name><![CDATA[CRC press]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B13">
<label>13</label><nlm-citation citation-type="book">
<collab>StatPoint</collab>
<source><![CDATA[Statgraphics Plus 5.1]]></source>
<year>2000</year>
<publisher-loc><![CDATA[StatPoint Rockville ]]></publisher-loc>
<publisher-name><![CDATA[MD]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B14">
<label>14</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[WingChing-Jones]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Lorío]]></surname>
<given-names><![CDATA[LU]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Biomasa y actividad microbiana en suelos de uso ganadero y en regeneración de bosque]]></article-title>
<source><![CDATA[Research Journal of the Costa Rican Distance Education University (ISSN: 1659-4266)]]></source>
<year>2016</year>
<volume>8</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>107-13</page-range></nlm-citation>
</ref>
<ref id="B15">
<label>15</label><nlm-citation citation-type="journal">
<collab>Cabrera-Dávila G de la C.Socarrás-Rivero AA.Hernández-Vigoa G.Ponce de León-Lima D.Menéndez-Rivero YI.Sánchez-Rendón JA</collab>
<article-title xml:lang=""><![CDATA[Evaluación de la macrofauna como indicador del estado de salud en siete sistemas de uso de la tierra, en Cuba]]></article-title>
<source><![CDATA[Pastos y Forrajes]]></source>
<year>2017</year>
<volume>40</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>118-26</page-range></nlm-citation>
</ref>
<ref id="B16">
<label>16</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Mesa-Pérez]]></surname>
<given-names><![CDATA[MA]]></given-names>
</name>
<name>
<surname><![CDATA[Echemendía-Pérez]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Valdés-Carmenate]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Sánchez-Elías]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Guridi-Izquierdo]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[La macrofauna edáfica, indicadora de contaminación por metales pesados en suelos ganaderos de Mayabeque, Cuba]]></article-title>
<source><![CDATA[Pastos y Forrajes]]></source>
<year>2016</year>
<volume>39</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>116-24</page-range></nlm-citation>
</ref>
<ref id="B17">
<label>17</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Mehraj]]></surname>
<given-names><![CDATA[I]]></given-names>
</name>
<name>
<surname><![CDATA[Mir]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Bhat]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Comparative evaluation of physic-chemical properties of rural and urban soil, along river Jhelum, Kashmir, India]]></article-title>
<source><![CDATA[International Journal of Recent Scientific Research]]></source>
<year>2014</year>
<volume>5</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>500-4</page-range></nlm-citation>
</ref>
<ref id="B18">
<label>18</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rossi]]></surname>
<given-names><![CDATA[CQ]]></given-names>
</name>
<name>
<surname><![CDATA[Pereira]]></surname>
<given-names><![CDATA[MG]]></given-names>
</name>
<name>
<surname><![CDATA[García]]></surname>
<given-names><![CDATA[AC]]></given-names>
</name>
<name>
<surname><![CDATA[Berbara]]></surname>
<given-names><![CDATA[RLL]]></given-names>
</name>
<name>
<surname><![CDATA[Gazolla]]></surname>
<given-names><![CDATA[PR]]></given-names>
</name>
<name>
<surname><![CDATA[Perin]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Effects on the composition and structural properties of the humified organic matter of soil in sugarcane strawburning A chronosequence study in the Brazilian Cerrado of Goiás State]]></article-title>
<source><![CDATA[Agriculture, ecosystems &amp; environment]]></source>
<year>2016</year>
<volume>216</volume>
<page-range>34-43</page-range></nlm-citation>
</ref>
<ref id="B19">
<label>19</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[de MP do]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
<name>
<surname><![CDATA[Robervone]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Ramos]]></surname>
<given-names><![CDATA[ML]]></given-names>
</name>
<name>
<surname><![CDATA[de Figueiredo]]></surname>
<given-names><![CDATA[CC]]></given-names>
</name>
<name>
<surname><![CDATA[Silva]]></surname>
<given-names><![CDATA[AM]]></given-names>
</name>
<name>
<surname><![CDATA[Silva]]></surname>
<given-names><![CDATA[SB]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Soil organic matter pools under management systems in Quilombola Territory in Brazilian Cerrado]]></article-title>
<source><![CDATA[Revista Brasileira de Engenharia Agricola e Ambiental-Agriambi]]></source>
<year>2017</year>
<volume>21</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>254-60</page-range></nlm-citation>
</ref>
<ref id="B20">
<label>20</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Silva]]></surname>
<given-names><![CDATA[JR]]></given-names>
</name>
<name>
<surname><![CDATA[Silva]]></surname>
<given-names><![CDATA[DJ]]></given-names>
</name>
<name>
<surname><![CDATA[Gava]]></surname>
<given-names><![CDATA[CAT]]></given-names>
</name>
<name>
<surname><![CDATA[Oliveira]]></surname>
<given-names><![CDATA[TCT de]]></given-names>
</name>
<name>
<surname><![CDATA[Freitas M do]]></surname>
<given-names><![CDATA[SC de]]></given-names>
</name>
<name>
<surname><![CDATA[Silva]]></surname>
<given-names><![CDATA[JR]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Carbon in Humic Fractions of Organic Matter in Soil Treated with Organic Composts under Mango Cultivation]]></article-title>
<source><![CDATA[Revista Brasileira de Ciência do Solo]]></source>
<year>2016</year>
</nlm-citation>
</ref>
<ref id="B21">
<label>21</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Páez]]></surname>
<given-names><![CDATA[LEC]]></given-names>
</name>
<name>
<surname><![CDATA[Realpe I del]]></surname>
<given-names><![CDATA[SB]]></given-names>
</name>
<name>
<surname><![CDATA[Peinado]]></surname>
<given-names><![CDATA[FJM]]></given-names>
</name>
<name>
<surname><![CDATA[Flores]]></surname>
<given-names><![CDATA[JCM]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Extracción secuencial de metales pesados en dos suelos contaminados (Andisol y Vertisol) enmendados con ácidos húmicos]]></article-title>
<source><![CDATA[Acta Agronómica]]></source>
<year>2016</year>
<volume>65</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>232-8</page-range></nlm-citation>
</ref>
<ref id="B22">
<label>22</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Trinidad]]></surname>
<given-names><![CDATA[SA]]></given-names>
</name>
<name>
<surname><![CDATA[Velasco-Velasco]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Importancia de la materia orgánica en el suelo]]></article-title>
<source><![CDATA[Revista Agroproductividad]]></source>
<year>2016</year>
<volume>9</volume>
<numero>8</numero>
<issue>8</issue>
<page-range>52-8</page-range></nlm-citation>
</ref>
<ref id="B23">
<label>23</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Reyes-Rodríguez]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Guridi-Izquierdo]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Valdés-Carmenate]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[El manejo del suelo modifica a sus ácidos húmicos y la disponibilidad de metales pesados]]></article-title>
<source><![CDATA[Cultivos Tropicales]]></source>
<year>2018</year>
<volume>39</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>15-20</page-range></nlm-citation>
</ref>
<ref id="B24">
<label>24</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ballesta]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Bueno]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Rubi]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Giménez]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Pedo-geochemical baseline content levels and soil quality reference values of trace elements in soils from the Mediterranean (Castilla La Mancha, Spain)]]></article-title>
<source><![CDATA[Open Geosciences]]></source>
<year>2010</year>
<volume>2</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>441-54</page-range></nlm-citation>
</ref>
<ref id="B25">
<label>25</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Delince]]></surname>
<given-names><![CDATA[W]]></given-names>
</name>
<name>
<surname><![CDATA[Valdés Carmenate]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[López Morgado]]></surname>
<given-names><![CDATA[O]]></given-names>
</name>
<name>
<surname><![CDATA[Guridi Izquierdo]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Balbín Arias]]></surname>
<given-names><![CDATA[MI]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Riesgo agroambiental por metales pesados en suelos con Cultivares de Oryza sativa L y Solanum tuberosum L]]></article-title>
<source><![CDATA[Revista Ciencias Técnicas Agropecuarias]]></source>
<year>2015</year>
<volume>24</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>44-50</page-range></nlm-citation>
</ref>
<ref id="B26">
<label>26</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sidhu]]></surname>
<given-names><![CDATA[GPS]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Heavy metal toxicity in soils Sources, remediation technologies and challenges. Adv. Plants Agric]]></article-title>
<source><![CDATA[Res]]></source>
<year>2016</year>
<volume>5</volume>
<page-range>00166</page-range></nlm-citation>
</ref>
<ref id="B27">
<label>27</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Edao]]></surname>
<given-names><![CDATA[HG]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Heavy metals pollution of soil; toxicity and phytoremediation techniques]]></article-title>
<source><![CDATA[Indian J. Adv. Eng. Res]]></source>
<year>2017</year>
<volume>1</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>2456-9992</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
