<?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>2007-0934</journal-id>
<journal-title><![CDATA[Revista mexicana de ciencias agrícolas]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Mex. Cienc. Agríc]]></abbrev-journal-title>
<issn>2007-0934</issn>
<publisher>
<publisher-name><![CDATA[Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-09342025000400100</article-id>
<article-id pub-id-type="doi">10.29312/remexca.v16i4.3644</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Influencia de las sustancias húmicas y fúlvicas en los atributos del suelo]]></article-title>
<article-title xml:lang="en"><![CDATA[Influence of humic and fulvic substances on soil attributes]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Silva]]></surname>
<given-names><![CDATA[Marco Aurélio da]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Guerra-Silva]]></surname>
<given-names><![CDATA[Natália Maria Maciel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Eloi-Sandini]]></surname>
<given-names><![CDATA[Itacir]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sussumu-Matsumoto]]></surname>
<given-names><![CDATA[Leopoldo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Estatal del Norte de Paraná Laboratorio de Microbiología de Suelos ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Brazil</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Estatal del Norte de Paraná Sector Enfermería ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Brazil</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Estatal del Centro-Oeste  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Brazil</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>07</month>
<year>2025</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>07</month>
<year>2025</year>
</pub-date>
<volume>16</volume>
<numero>4</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-09342025000400100&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-09342025000400100&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-09342025000400100&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Las sustancias húmicas y fúlvicas son compuestos orgánicos provenientes de la descomposición de residuos vegetales y animales en el ambiente, que pueden ser utilizados como insumos alternativos para el manejo de diversos cultivos. El objetivo del trabajo fue evaluar la influencia de sustancias húmicas y fúlvicas sobre los atributos químicos y microbiológicos del suelo. Se recolectaron muestras de suelo a una profundidad de 0-10 cm antes de la siembra y en la etapa de floración (R2) y se evaluaron atributos químicos, como contenido de macronutrientes, pH y materia orgánica y atributos microbiológicos como carbono de la biomasa microbiana, respiración basal del suelo, cociente microbiano y metabólico para determinar la actividad microbiana. En parámetros agronómicos se evaluó el desarrollo de las plantas y la productividad. En los resultados de atributos químicos se observaron pocas alteraciones; sin embargo, se notó una mejora en la concentración de materia orgánica en las áreas que recibieron sustancias húmicas y fúlvicas a una dosis de 4 L ha-1, que también se observa en los atributos microbiológicos, con aumento de la comunidad microbiana y mejora significativa en la actividad biológica del suelo. Datos que se reflejaron en aumento de productividad, con aumento de 10 a 14 sacos ha-1, sin y con asociación con Bacillus sp., respectivamente. Se concluye que las sustancias a base de ácidos húmicos y fúlvicos a dosis de 4 L ha-1 con o sin asociación con la bacteria Bacillus sp., promovieron mejoras en los atributos microbiológicos del suelo y consecuentemente en el desarrollo del cultivo de soya.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Humic and fulvic substances are organic compounds originating from the decomposition of plant and animal residues in the environment, which can be used as alternative inputs for the management of various crops. The objective of this work was to evaluate the influence of humic and fulvic substances on the chemical and microbiological attributes of the soil in soybean crops. Soil samples were collected at a depth of 0-10 cm before planting and at the flowering stage (R2), and chemical attributes were evaluated, such as macronutrient content, pH and organic matter, and microbiological attributes such as Microbial Biomass Carbon (MBC), Basal Respiration (BR), microbial and metabolic quotient to determine microbial activity. In agronomic parameters, plant development and productivity were evaluated. In the results of chemical attributes, little change was observed between treatments in the concentration of macronutrients; however, an improvement was observed in the concentration of organic matter in areas that received humic and fulvic substances at a dose of 4 L ha-1, a fact also observed in microbiological attributes, with an increase in the microbial community and significant improvement in biological activity of the soil. Data reflected the increase in productivity, with an increase of 10 to 14 bags per hectare, without and with association with Bacillus sp. respectively. It is concluded that humic and fulvic acids at a dose of 4 L ha-1 with or without association with the bacteria Bacillus sp. promoted improvements in the microbiological attributes of the soil and consequently in the development of soybean cultivation.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Glycine max]]></kwd>
<kwd lng="es"><![CDATA[bioindicadores de calidad del suelo]]></kwd>
<kwd lng="es"><![CDATA[bioinsumos]]></kwd>
<kwd lng="es"><![CDATA[rizobacterias]]></kwd>
<kwd lng="en"><![CDATA[Glycine max]]></kwd>
<kwd lng="en"><![CDATA[bioinputs]]></kwd>
<kwd lng="en"><![CDATA[rhizobacteria]]></kwd>
<kwd lng="en"><![CDATA[soil quality bioindicators]]></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[Ampong]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
<name>
<surname><![CDATA[Thilakaranthna]]></surname>
<given-names><![CDATA[M. S.]]></given-names>
</name>
<name>
<surname><![CDATA[Gorim]]></surname>
<given-names><![CDATA[L. Y.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Understanding the role of humic acids on crop performance and soil health]]></article-title>
<source><![CDATA[Frontier in Agronomy]]></source>
<year>2022</year>
<numero>4</numero>
<issue>4</issue>
<page-range>1-14</page-range></nlm-citation>
</ref>
<ref id="B2">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Anderson]]></surname>
<given-names><![CDATA[T. H.]]></given-names>
</name>
<name>
<surname><![CDATA[Domsch]]></surname>
<given-names><![CDATA[K. H.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The metabolic quotient for CO2 (qCO2) as a specific activity parameter to assess the effects of environmental conditions, such as pH, on the microbial biomass of forest soils]]></article-title>
<source><![CDATA[Soil Biology and Biochemistry]]></source>
<year>1993</year>
<volume>3</volume>
<numero>25</numero>
<issue>25</issue>
<page-range>393-5</page-range></nlm-citation>
</ref>
<ref id="B3">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bertolin]]></surname>
<given-names><![CDATA[D. C.]]></given-names>
</name>
<name>
<surname><![CDATA[Sá]]></surname>
<given-names><![CDATA[M. E.]]></given-names>
</name>
<name>
<surname><![CDATA[Arf]]></surname>
<given-names><![CDATA[O.]]></given-names>
</name>
<name>
<surname><![CDATA[Furlani-Junior]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
<name>
<surname><![CDATA[Colombo]]></surname>
<given-names><![CDATA[A. S.]]></given-names>
</name>
<name>
<surname><![CDATA[Carvalho]]></surname>
<given-names><![CDATA[F. L. B. M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Aumento da produtividade de soja com a aplicação de bioestimulantes]]></article-title>
<source><![CDATA[Bragantia Campinas]]></source>
<year>2010</year>
<volume>2</volume>
<numero>69</numero>
<issue>69</issue>
<page-range>339-47</page-range></nlm-citation>
</ref>
<ref id="B4">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Carmello]]></surname>
<given-names><![CDATA[Q. A. C.]]></given-names>
</name>
<name>
<surname><![CDATA[Oliveira]]></surname>
<given-names><![CDATA[F. A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Nutrição de lavouras de soja: situação atual e perspectivas]]></article-title>
<source><![CDATA[Visão Agrícola]]></source>
<year>2006</year>
<volume>5</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>8-11</page-range></nlm-citation>
</ref>
<ref id="B5">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Caron]]></surname>
<given-names><![CDATA[V. C.]]></given-names>
</name>
<name>
<surname><![CDATA[Graças]]></surname>
<given-names><![CDATA[J. P.]]></given-names>
</name>
<name>
<surname><![CDATA[Castro]]></surname>
<given-names><![CDATA[P. R. C.]]></given-names>
</name>
</person-group>
<source><![CDATA[Condicionadores do solo: ácidos húmicos e fúlvicos]]></source>
<year>2015</year>
<page-range>13-27</page-range><publisher-name><![CDATA[Piracicaba: ESALQ-USP]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B6">
<nlm-citation citation-type="book">
<collab>CONAB</collab>
<source><![CDATA[Evolução de produção de soja no Brasil]]></source>
<year>2024</year>
<page-range>111</page-range><publisher-loc><![CDATA[Brasília ]]></publisher-loc>
<publisher-name><![CDATA[Companhia Nacional de Abastecimento]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B7">
<nlm-citation citation-type="book">
<collab>CONAB</collab>
<source><![CDATA[Companhia Nacional de Abastecimento. Evolução dos custos de produção de soja no Brasil]]></source>
<year>2016</year>
<page-range>156</page-range><publisher-loc><![CDATA[Brasília ]]></publisher-loc>
<publisher-name><![CDATA[Conab]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B8">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Silva]]></surname>
<given-names><![CDATA[F. C.]]></given-names>
</name>
</person-group>
<collab>Embrapa</collab>
<source><![CDATA[Manual de análises químicas de solos, plantas e fertilizantes]]></source>
<year>2009</year>
<edition>2</edition>
<page-range>627</page-range><publisher-name><![CDATA[empresa brasileira de pesquisa agropecuária]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B9">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ferreira]]></surname>
<given-names><![CDATA[D. F.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Sisvar: a computer analysis system to fixed effects split plot type designs]]></article-title>
<source><![CDATA[Revista Brasileira de Biometria]]></source>
<year>2019</year>
<volume>4</volume>
<numero>37</numero>
<issue>37</issue>
<page-range>529-35</page-range></nlm-citation>
</ref>
<ref id="B10">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Galambos]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
<name>
<surname><![CDATA[Compant]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
<name>
<surname><![CDATA[Moretto]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Sicher]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Puopolo]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Wäckers]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Humic acid enhances the growth of tomato promoted by endophytic bacterial strains through the activation of hormone growth and transcription related processes]]></article-title>
<source><![CDATA[Frontier in Plant Science]]></source>
<year>2020</year>
<volume>11</volume>
<page-range>1-14</page-range></nlm-citation>
</ref>
<ref id="B11">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Halpern]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Bar-Tal]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
<name>
<surname><![CDATA[Ofek]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Minz]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[Muller]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
<name>
<surname><![CDATA[Yermiyahu]]></surname>
<given-names><![CDATA[U.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Chapter two is the use of biostimulants for enhancing nutrient uptake]]></article-title>
<source><![CDATA[Advances in Agronomy]]></source>
<year>2015</year>
<volume>130</volume>
<page-range>141-74</page-range></nlm-citation>
</ref>
<ref id="B12">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Hita]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[Fuentes]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<name>
<surname><![CDATA[Zamarreño]]></surname>
<given-names><![CDATA[A. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Ruiz]]></surname>
<given-names><![CDATA[Y.]]></given-names>
</name>
<name>
<surname><![CDATA[García-Mina]]></surname>
<given-names><![CDATA[J. M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Culturable bacterial endophytes from sedimentary humic acid-treated plants]]></article-title>
<source><![CDATA[Frontier in Plant Science]]></source>
<year>2020</year>
<volume>11</volume>
<page-range>1-12</page-range></nlm-citation>
</ref>
<ref id="B13">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Li]]></surname>
<given-names><![CDATA[Y.]]></given-names>
</name>
<name>
<surname><![CDATA[Fang]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
<name>
<surname><![CDATA[Wei]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Wu]]></surname>
<given-names><![CDATA[X.]]></given-names>
</name>
<name>
<surname><![CDATA[Cui]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[Li]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Zheng]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
<name>
<surname><![CDATA[Tan]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Humic acid fertilizer improved soil properties and soil microbial diversity of continuous cropping peanut: a three year experiment]]></article-title>
<source><![CDATA[Scientific reports]]></source>
<year>2019</year>
<volume>1</volume>
<numero>9</numero>
<issue>9</issue>
<page-range>1-9</page-range></nlm-citation>
</ref>
<ref id="B14">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Lopes]]></surname>
<given-names><![CDATA[J. A. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Pelúzio]]></surname>
<given-names><![CDATA[J. M.]]></given-names>
</name>
<name>
<surname><![CDATA[Martins]]></surname>
<given-names><![CDATA[G. S.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Teor de proteína e óleo em grãos de soja, em diferentes épocas de plantio para fins industriais]]></article-title>
<source><![CDATA[Tecnologia &amp; Ciência Agropecuária, João Pessoa]]></source>
<year>2016</year>
<volume>3</volume>
<numero>10</numero>
<issue>10</issue>
<page-range>49-53</page-range></nlm-citation>
</ref>
<ref id="B15">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Morzelle]]></surname>
<given-names><![CDATA[M. C.]]></given-names>
</name>
<name>
<surname><![CDATA[Peters]]></surname>
<given-names><![CDATA[L. P.]]></given-names>
</name>
<name>
<surname><![CDATA[Geraldi]]></surname>
<given-names><![CDATA[A. B.]]></given-names>
</name>
<name>
<surname><![CDATA[Castro]]></surname>
<given-names><![CDATA[P. R. C.]]></given-names>
</name>
<name>
<surname><![CDATA[Mendes]]></surname>
<given-names><![CDATA[A. C. C. M.]]></given-names>
</name>
</person-group>
<source><![CDATA[Agroquímicos estimulantes, extratos vegetais e metabólicos microbianos na agricultura]]></source>
<year>2017</year>
<numero>63^sSérie produtor rural</numero>
<edition>1</edition>
<issue>63^sSérie produtor rural</issue>
<supplement>Série produtor rural</supplement>
<page-range>96</page-range><publisher-name><![CDATA[Piracicaba]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B16">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Oliveira]]></surname>
<given-names><![CDATA[F. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Sfredo]]></surname>
<given-names><![CDATA[G. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Klepker]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[Castro]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
</person-group>
<source><![CDATA[Exigências minerais e adubação]]></source>
<year>2019</year>
<page-range>1-8</page-range><publisher-name><![CDATA[Embrapa]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B17">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Silva]]></surname>
<given-names><![CDATA[E. E.]]></given-names>
</name>
<name>
<surname><![CDATA[Azevedo]]></surname>
<given-names><![CDATA[P. H. S.]]></given-names>
</name>
<name>
<surname><![CDATA[Polli]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
</person-group>
<source><![CDATA[Determinação do carbono da biomassa microbiana do solo]]></source>
<year>2007</year>
<page-range>6</page-range><publisher-name><![CDATA[Seropédica]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B18">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Silva]]></surname>
<given-names><![CDATA[R. R. D.]]></given-names>
</name>
<name>
<surname><![CDATA[Silva]]></surname>
<given-names><![CDATA[M. L. N.]]></given-names>
</name>
<name>
<surname><![CDATA[Cardoso]]></surname>
<given-names><![CDATA[E. L.]]></given-names>
</name>
<name>
<surname><![CDATA[Moreira]]></surname>
<given-names><![CDATA[F. M. D. S.]]></given-names>
</name>
<name>
<surname><![CDATA[Curi]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
<name>
<surname><![CDATA[Alivisi]]></surname>
<given-names><![CDATA[A. M. T.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Biomassa e atividade microbiana em solos sob diferentes sistemas de manejo na região fisiográfica campos das vertentes MG]]></article-title>
<source><![CDATA[Revista Brasileira de Ciência do Solo, Viçosa, MG.]]></source>
<year>2010</year>
<volume>5</volume>
<numero>34</numero>
<issue>34</issue>
<page-range>1585-92</page-range></nlm-citation>
</ref>
<ref id="B19">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Soares]]></surname>
<given-names><![CDATA[L. H.]]></given-names>
</name>
</person-group>
<source><![CDATA[Manejo fisiológico com base em tratamento de sementes e aplicação de organominerais via foliar para sistemas de alto potencial produtivo de soja]]></source>
<year>2013</year>
<page-range>130</page-range><publisher-loc><![CDATA[Piracicaba ]]></publisher-loc>
<publisher-name><![CDATA[Universidade de São Paulo]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B20">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Tedesco]]></surname>
<given-names><![CDATA[M. J.]]></given-names>
</name>
<name>
<surname><![CDATA[Gianello]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
<name>
<surname><![CDATA[Bissani]]></surname>
<given-names><![CDATA[C. A.]]></given-names>
</name>
<name>
<surname><![CDATA[Bohnem]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
<name>
<surname><![CDATA[Vlkweiss]]></surname>
<given-names><![CDATA[S. J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Análise de solo, plantas e outros materiais]]></source>
<year>1995</year>
<edition>2</edition>
<page-range>174</page-range><publisher-loc><![CDATA[Porto alegre ]]></publisher-loc>
<publisher-name><![CDATA[UFRGS-Departamento de Solos]]></publisher-name>
</nlm-citation>
</ref>
</ref-list>
</back>
</article>
