<?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>S0377-94242017000200026</article-id>
<article-id pub-id-type="doi">10.15517/rac.v41i2.31298</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Efecto del manejo orgánico y convencional sobre propiedades bioquímicas de un Andisol y el cultivo de papa en invernadero]]></article-title>
<article-title xml:lang="en"><![CDATA[Biochemical characterization of an organic and conventional managed Andisol, and its evaluation by the response of greenhouse-grown potato]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Marín]]></surname>
<given-names><![CDATA[Stephanie]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Bertsch]]></surname>
<given-names><![CDATA[Floria]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Castro]]></surname>
<given-names><![CDATA[Leida]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Costa Rica Centro de Investigaciones Agronómicas ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de Costa Rica Centro de Investigaciones Agronómicas ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Costa Rica</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad de Costa Rica Centro de Investigaciones Agronómicas ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Costa Rica</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2017</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2017</year>
</pub-date>
<volume>41</volume>
<numero>2</numero>
<fpage>26</fpage>
<lpage>46</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_arttext&amp;pid=S0377-94242017000200026&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_abstract&amp;pid=S0377-94242017000200026&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.sa.cr/scielo.php?script=sci_pdf&amp;pid=S0377-94242017000200026&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Se determinaron características bioquímicas de un Andisol de Zarcero, sometido por más de 20 años, al manejo orgánico y al convencional. Posteriormente se evaluó en ambos suelos el rendimiento de la papa en condiciones de invernadero, bajo los siguientes tratamientos: fertilización convencional, fertilización orgánica, fertilización convencional más solubilizadores de P y fertilización orgánica más solubilizadores de P y un testigo. Concluido el ciclo de la papa, se cultivó maíz para evaluar el efecto residual de los diferentes tipos de fertilización. El suelo orgánico presentó 54% más C orgánico, la acidez fue muy baja (0,16 cmol(+).l-1) y el pH alcanzó la neutralidad (6,3), mientras que para el suelo convencional los valores fueron de 1,4 cmol(+).l-1 y 5. Los contenidos de Ca y Mg en el suelo orgánico cuadriplicaron los valores del suelo convencional, por lo que la CEC se duplicó. El suelo convencional presentó desbalances en todas las relaciones, mientras que el suelo orgánico en la relación Ca/Mg. Los valores de C y N totales fueron inferiores en el suelo convencional, y la relación C/N fue similar. El P en las 2 condiciones fue alto, en el suelo convencional se relacionó con las fertilizaciones químicas, mientras que en el suelo orgánico a las fuentes minerales y orgánicas. Los valores de Cu, Fe y Mn fueron menores en el suelo orgánico. La cantidad de UFC.gr-1 de actinomicetes y bacterias fue menor en uno y 2 órdenes de magnitud en el suelo convencional, mientras la tasa de respiración fue mayor. En el suelo con manejo convencional, la fertilización convencional más solubilizadores de P generó el mayor rendimiento de tubérculos. En el suelo con manejo orgánico, la fertilización convencional y la orgánica presentaron el mayor rendimiento sin diferencia significativa entre ellos. Además, el suelo convencional con fertilización convencional y el suelo orgánico con fertilización orgánica obtuvieron rendimientos similares. La fertilización convencional ocasionó una mayor residualidad en ambos suelos.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Biochemical characteristics of an Andisol of Zarcero, subjected for more than 20 years to conventional and organic management, were determined. Then behavior of both soils was evaluated by studying the yield of potato crop in greenhouse conditions, under the following treatments: conventional fertilization, organic fertilization, conventional fertilization with P solubilizers, organic fertilization with P solubilizers and no fertilization. Once the potato cycle was completed, maize was grown in order to evaluate the residual effect of the different types of fertilization. The organic soil showed 54% more organic C, its acidity was very low (0.16 cmol(+).l-1) and the pH reached neutrality (6.3); meanwhile, the values on the conventional soil were 1.4 cmol(+).l-1 and 5, respectively. The contents of Ca and Mg in the organic soil were four times higher than in the conventional soil, so the CEC was doubled. The conventional soil presented unbalances in all the rations, while the organic soil in the Ca/Mg ratio. Total C and N values were lower in the conventional soil, and the C/N ratio was similar in both systems. P was high in both systems; in the conventional soil, the high value was related to the application of chemical fertilizers, while in the organic soil, the P content was related to mineral and organic sources. The Cu, Fe and Mn values were lower in the organic soil. The amount of UFC.gr-1 of actinomycetes and bacteria in the conventional soil were lower in one and 2 orders of magnitude respectively, while soil respiration was higher. The conventional fertilization with P solubilizers allowed higher tuber yields in the soil with conventional handling. In the organic soil, the higher potato yield were obtained with the conventional and organic fertilization with no significant differences among them. In addition, the conventional fertilization in the conventional soil and the organic fertilization in the organic soil had similar yields. The conventional fertilization caused higher residuality in both soils.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Agricultura orgánica]]></kwd>
<kwd lng="es"><![CDATA[fertilización convencional]]></kwd>
<kwd lng="es"><![CDATA[fertilización orgánica]]></kwd>
<kwd lng="es"><![CDATA[solubilizadores de P]]></kwd>
<kwd lng="es"><![CDATA[Andisol]]></kwd>
<kwd lng="es"><![CDATA[efecto residual]]></kwd>
<kwd lng="es"><![CDATA[Finca Orgánica Guadalupe]]></kwd>
<kwd lng="en"><![CDATA[Organic agriculture]]></kwd>
<kwd lng="en"><![CDATA[conventional fertilizer]]></kwd>
<kwd lng="en"><![CDATA[organic fertilizer]]></kwd>
<kwd lng="en"><![CDATA[solubilizers P]]></kwd>
<kwd lng="en"><![CDATA[Andisol]]></kwd>
<kwd lng="en"><![CDATA[residual effect]]></kwd>
<kwd lng="en"><![CDATA[Organic Farm Guadalupe]]></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[Alvarado]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Manejo de suelos derivados de cenizas volcánicas.]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Meléndez]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
<name>
<surname><![CDATA[Molina]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
</person-group>
<source><![CDATA[Fertilidad de suelos y manejo de la nutrición de cultivos en Costa Rica, 2001]]></source>
<year>2001</year>
<page-range>11-26.</page-range><publisher-loc><![CDATA[San José, Costa Rica. ]]></publisher-loc>
<publisher-name><![CDATA[Laboratorio de Suelos y Foliares, CIA/UCR,]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B2">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Alvarado]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Iturriaga]]></surname>
<given-names><![CDATA[I]]></given-names>
</name>
<name>
<surname><![CDATA[Smyth]]></surname>
<given-names><![CDATA[JT]]></given-names>
</name>
<name>
<surname><![CDATA[Portuguez]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Ureña]]></surname>
<given-names><![CDATA[JM.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Efecto residual del fertilizante fosfatado adicionado al cultivo de la papa en un Andisol de Juan Viñas, Costa Rica.]]></article-title>
<source><![CDATA[Agronomía Costarricense]]></source>
<year>2009</year>
<volume>33</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>63-76</page-range></nlm-citation>
</ref>
<ref id="B3">
<nlm-citation citation-type="confpro">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Angoa]]></surname>
<given-names><![CDATA[MV.]]></given-names>
</name>
</person-group>
<source><![CDATA[Microorganismos nativos y sus beneficios en la producción agrícola]]></source>
<year>2012</year>
<conf-name><![CDATA[ VIICongreso Nacional de Suelos]]></conf-name>
<conf-date>2012</conf-date>
<conf-loc>San José, Costa Rica </conf-loc>
<page-range>4</page-range></nlm-citation>
</ref>
<ref id="B4">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Babilonia]]></surname>
<given-names><![CDATA[R. 2011.]]></given-names>
</name>
</person-group>
<source><![CDATA[Impactos del cambio climático en la distribución espacial de las zonas de aptitud potencial del cultivo de la papa (Solanum tuberosum) en la cuenca del río Reventazón, Costa Rica.]]></source>
<year></year>
<page-range>151</page-range><publisher-loc><![CDATA[Turrialba, Costa Rica ]]></publisher-loc>
<publisher-name><![CDATA[CATIE, ACCS]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B5">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Barrios]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Soil biota, ecosystem services and land productivity.]]></article-title>
<source><![CDATA[Ecological economics]]></source>
<year>2007</year>
<volume>64</volume>
<page-range>269-85</page-range></nlm-citation>
</ref>
<ref id="B6">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bending]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Turnera]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Raynsb]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Marxc]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Wood]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Microbial and biochemical soil quality indicators and their potential for differentiating areas under contrasting agricultural management regimes.]]></article-title>
<source><![CDATA[Soil Biology &amp; Biochemistry]]></source>
<year>2004</year>
<volume>36</volume>
<page-range>1785-92</page-range></nlm-citation>
</ref>
<ref id="B7">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bertsch]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
</person-group>
<source><![CDATA[Manual para interpretar la fertilidad de los suelos de Costa Rica.]]></source>
<year>1987</year>
<edition>2</edition>
<page-range>76</page-range><publisher-loc><![CDATA[San José, Costa Rica ]]></publisher-loc>
<publisher-name><![CDATA[Oficina de Publicaciones de la Universidad de Costa Rica]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B8">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bertsch]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Problemas de fertilidad de suelos de Costa Rica.]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Meléndez]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Molina]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
</person-group>
<source><![CDATA[Fertilidad de suelos y manejo de la nutrición de cultivos en Costa Rica, 2001]]></source>
<year>2001</year>
<page-range>1-10</page-range><publisher-loc><![CDATA[San José, Costa Rica ]]></publisher-loc>
<publisher-name><![CDATA[Laboratorio de Suelos y Foliares, CIA/UCR.]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B9">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bertsch]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
</person-group>
<source><![CDATA[Absorción de nutrimentos por los cultivos (multimedia).]]></source>
<year>2009</year>
<page-range>184-5</page-range><publisher-loc><![CDATA[San José, Costa Rica ]]></publisher-loc>
<publisher-name><![CDATA[ACCS]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B10">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Castro]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Murillo]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Uribe]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Mata]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Inoculación al suelo con Pseudomonas fluorescens, Azospirillum oryzae, Bacillus subtilis y microorganismos de montaña (MM) y su efecto sobre un sistema de rotación soya-tomate bajo condiciones de invernadero]]></article-title>
<source><![CDATA[Agronomía Costarricense]]></source>
<year>2015</year>
<volume>39</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>21-36</page-range></nlm-citation>
</ref>
<ref id="B11">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Cavigelli]]></surname>
<given-names><![CDATA[MA]]></given-names>
</name>
<name>
<surname><![CDATA[Teasdale]]></surname>
<given-names><![CDATA[JR]]></given-names>
</name>
<name>
<surname><![CDATA[Conklin]]></surname>
<given-names><![CDATA[AE.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Long-term agronomic performance of organic and conventional field crops in the Mid-Atlantic Region.]]></article-title>
<source><![CDATA[Agronomy Journal]]></source>
<year>2008</year>
<volume>100</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>785-94</page-range></nlm-citation>
</ref>
<ref id="B12">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Chinchilla]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Mata]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Alvarado]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Andisoles, Inceptisoles y Entisoles de la subcuenca del río Pirrís, Región de los Santos, Talamanca, Costa Rica.]]></article-title>
<source><![CDATA[Agronomía Costarricense]]></source>
<year>2011</year>
<volume>35</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>83-107</page-range></nlm-citation>
</ref>
<ref id="B13">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Corrales]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Bertsch]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Bejarano]]></surname>
<given-names><![CDATA[JA.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Los laboratorios de análisis de suelos y foliares en Costa Rica: Informe del comité de laboratorios de análisis de suelos, plantas y aguas.]]></article-title>
<source><![CDATA[Agronomía Costarricense]]></source>
<year>2005</year>
<volume>29</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>125-35</page-range></nlm-citation>
</ref>
<ref id="B14">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Covarrubias]]></surname>
<given-names><![CDATA[JM]]></given-names>
</name>
<name>
<surname><![CDATA[Castillo]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Vera]]></surname>
<given-names><![CDATA[JA]]></given-names>
</name>
<name>
<surname><![CDATA[Sánchez]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Aveldaño]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Peña]]></surname>
<given-names><![CDATA[JJ.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Absorción y eficiencia de uso de fósforo en papa cultivar Alpha con 32P.]]></article-title>
<source><![CDATA[Agrociencia]]></source>
<year>2005</year>
<volume>39</volume>
<page-range>127-36</page-range></nlm-citation>
</ref>
<ref id="B15">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Diacono]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Montemurro]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Long-term effects of organic amendments on soil fertility.]]></article-title>
<source><![CDATA[A review. Agron. Sustain. Dev.]]></source>
<year>2010</year>
<volume>30</volume>
<page-range>401-22</page-range></nlm-citation>
</ref>
<ref id="B16">
<nlm-citation citation-type="confpro">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Enríquez]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Bernal]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
</person-group>
<source><![CDATA[Evaluación de la efectividad de cuatro dosis de micorrizas arbusculares bajo cuatro niveles de fósforo en vivero de palmito (Bactris gasipaes, HBK), en la zona de Santo Domingo de los Colorados.]]></source>
<year>2008</year>
<conf-name><![CDATA[ XICongreso Ecuatoriano de la Ciencias del Suelo]]></conf-name>
<conf-date>2008</conf-date>
<conf-loc>Quito, Ecuador </conf-loc>
<page-range>15</page-range></nlm-citation>
</ref>
<ref id="B17">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Fernández]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[Fernández]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Rivera]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Olalde]]></surname>
<given-names><![CDATA[V]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Micorrización in vitro e in vivo de plántulas de papa (Solanum tuberosum var. Alfa).]]></article-title>
<source><![CDATA[Cultivos Tropicales]]></source>
<year>2010</year>
<volume>31</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>21-31</page-range></nlm-citation>
</ref>
<ref id="B18">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ferrera]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Alarcón]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[La microbiología del suelo en la agricultura sostenible.]]></article-title>
<source><![CDATA[Ciencia Ergo Sum]]></source>
<year>2001</year>
<volume>8</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>175-83</page-range></nlm-citation>
</ref>
<ref id="B19">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[García]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Mamani]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Román]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
<name>
<surname><![CDATA[Suárez]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Contreras]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Malca]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Efecto de la adición de materia orgánica sobre la dinámica poblacional bacteriana del suelo en cultivos de papa y maíz.]]></article-title>
<source><![CDATA[Peruana de Biología]]></source>
<year>2011</year>
<volume>18</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>355-60</page-range></nlm-citation>
</ref>
<ref id="B20">
<nlm-citation citation-type="book">
<collab>GFA (Consulting Group S.A.)</collab>
<source><![CDATA[Estudio del estado de la producción sostenible y propuesta de mecanismos permanentes para el fomento de la producción sostenible.]]></source>
<year>2010</year>
<page-range>311</page-range><publisher-loc><![CDATA[Costa Rica ]]></publisher-loc>
<publisher-name><![CDATA[Elaborado para el Ministerio de Agricultura y Ganadería,]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B21">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gliessman]]></surname>
<given-names><![CDATA[SR.]]></given-names>
</name>
</person-group>
<source><![CDATA[Agroecología: procesos ecológicos en agricultura sostenible.]]></source>
<year>2002</year>
<page-range>359</page-range><publisher-loc><![CDATA[Turrialba, Costa Rica ]]></publisher-loc>
<publisher-name><![CDATA[CATIE]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B22">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gomiero]]></surname>
<given-names><![CDATA[T]]></given-names>
</name>
<name>
<surname><![CDATA[PImentel]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Paoletti]]></surname>
<given-names><![CDATA[MG.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Environmental impact of different agricultural management practices: conventional vs. organic agriculture.]]></article-title>
<source><![CDATA[Crit. Rev. Plant Sci.]]></source>
<year>2011</year>
<volume>30</volume>
<page-range>95-124</page-range></nlm-citation>
</ref>
<ref id="B23">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Henríquez]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Cabalceta]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Bertsch]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Alvarado]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<source><![CDATA[Principales suelos de Costa Rica (en línea).]]></source>
<year>2014</year>
<publisher-name><![CDATA[ACCS]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B24">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Hernández]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Manejo agronómico integral de sustratos, métodos de siembra y biofertilización en la producción sostenible de tubérculos-semilla de papa por semilla sexual.]]></article-title>
<source><![CDATA[Cultivos Tropicales]]></source>
<year>2001</year>
<volume>22</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>21-7</page-range></nlm-citation>
</ref>
<ref id="B25">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Jenkinson]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Powlson]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The effects of biocidal treatment on metabolism in soil-V. A method for measuring soil biomass.]]></article-title>
<source><![CDATA[Soil Biology and Biochemistry]]></source>
<year>1976</year>
<volume>8</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>209-13</page-range></nlm-citation>
</ref>
<ref id="B26">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Kibblewhite]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Ritz]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[Swift]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Soil health in agricultural systems.]]></article-title>
<source><![CDATA[Philosophical Transactions of the Royal Society B: Biological Sciences]]></source>
<year>2015</year>
<volume>363</volume>
<numero>1492</numero>
<issue>1492</issue>
<page-range>685-701</page-range></nlm-citation>
</ref>
<ref id="B27">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Leifeld]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
<name>
<surname><![CDATA[Reiser]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
<name>
<surname><![CDATA[OBerholzer]]></surname>
<given-names><![CDATA[HR.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Consequences of conventional versus organic farming on soil carbon: results from a 27-years field experiment.]]></article-title>
<source><![CDATA[Agronomy Journal]]></source>
<year>2009</year>
<volume>101</volume>
<numero>5</numero>
<issue>5</issue>
<page-range>1204-18</page-range></nlm-citation>
</ref>
<ref id="B28">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Mader]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Fliebbach]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Dubois]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Gunst]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Fried]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Niggli]]></surname>
<given-names><![CDATA[U.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Soil Fertility and Biodiversity in Organic Farming.]]></article-title>
<source><![CDATA[Science]]></source>
<year>2002</year>
<volume>296</volume>
<page-range>1694-7</page-range></nlm-citation>
</ref>
<ref id="B29">
<nlm-citation citation-type="book">
<collab>MAG (Ministerio de Agricultura y Ganadería)</collab>
<source><![CDATA[Caracterización de la agrocadena de papa, Cartago, Costa Rica.]]></source>
<year>2007</year>
<page-range>61</page-range><publisher-loc><![CDATA[Cartago, Costa Rica ]]></publisher-loc>
<publisher-name><![CDATA[MAG, Dirección Central Oriental,]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B30">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Martínez]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Fuentes]]></surname>
<given-names><![CDATA[JP]]></given-names>
</name>
<name>
<surname><![CDATA[Acevedo]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Carbono orgánico y propiedades del suelo.]]></article-title>
<source><![CDATA[Ciencia del Suelo y Nutrición Vegetal]]></source>
<year>2008</year>
<volume>8</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>68-96</page-range></nlm-citation>
</ref>
<ref id="B31">
<nlm-citation citation-type="confpro">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Mena]]></surname>
<given-names><![CDATA[HG.]]></given-names>
</name>
</person-group>
<source><![CDATA[Microorganismos riszosféricos como promotores de la calidad de productos agrícolas.]]></source>
<year>2012</year>
<conf-name><![CDATA[ VIICongreso Nacional de Suelos]]></conf-name>
<conf-date>2012</conf-date>
<conf-loc>San José, Costa Rica </conf-loc>
<page-range>6</page-range></nlm-citation>
</ref>
<ref id="B32">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Méndez]]></surname>
<given-names><![CDATA[JC]]></given-names>
</name>
<name>
<surname><![CDATA[Bertsch]]></surname>
<given-names><![CDATA[F.]]></given-names>
</name>
</person-group>
<source><![CDATA[Guía para la interpretación de la fertilidad de los suelos de Costa Rica.]]></source>
<year>2012</year>
<page-range>108</page-range><publisher-loc><![CDATA[San José, Costa Rica. ]]></publisher-loc>
<publisher-name><![CDATA[ACCS]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B33">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Mingorance]]></surname>
<given-names><![CDATA[MD.]]></given-names>
</name>
</person-group>
<source><![CDATA[El suelo, regulador fisicoquímico de elementos traza para las plantas.]]></source>
<year>2010</year>
<page-range>14</page-range><publisher-loc><![CDATA[Granada, España ]]></publisher-loc>
<publisher-name><![CDATA[Departamento Geoquímica Ambiental, Estación Experimental del Zaidín, CSIC,]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B34">
<nlm-citation citation-type="confpro">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Monreal]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<source><![CDATA[Actividad de los microorganismos del suelo en sistemas agrícolas con uso mínimo de insumos.]]></source>
<year>2003</year>
<conf-name><![CDATA[ Congreso Alianza Tecnológica para la Agricultura con Calidad]]></conf-name>
<conf-date>2003</conf-date>
<conf-loc>San José, Costa Rica </conf-loc>
<page-range>75</page-range></nlm-citation>
</ref>
<ref id="B35">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Mondelaers]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Van Huylenbroeck]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A meta-analysis of the differences in environmental impacts between organic and conventional farming.]]></article-title>
<source><![CDATA[Brit. Food. J.]]></source>
<year>2009</year>
<volume>111</volume>
<page-range>1098-119</page-range></nlm-citation>
</ref>
<ref id="B36">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Moreno]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
</person-group>
<source><![CDATA[Efecto de la cianamida cálcica y los fosfitos como fuentes de fertilizante y sobre el tizón tardío (Phytophthora infestans) en dos variedades de papa (Solanum tuberosum) a nivel de invernadero.]]></source>
<year>2012</year>
<page-range>66</page-range><publisher-loc><![CDATA[San José, Costa Rica ]]></publisher-loc>
<publisher-name><![CDATA[Universidad de Costa Rica]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B37">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Moreno]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Inoculación de micorrizas MVA en papa (Solanum tuberosum) respuesta en el crecimiento y nutrición de plantas inoculadas en invernadero y en campo.]]></article-title>
<source><![CDATA[Latinoamericana de la Papa]]></source>
<year>1988</year>
<volume>1</volume>
<page-range>84-103</page-range></nlm-citation>
</ref>
<ref id="B38">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Muñoz]]></surname>
<given-names><![CDATA[LA]]></given-names>
</name>
<name>
<surname><![CDATA[Lucero]]></surname>
<given-names><![CDATA[AM.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Efecto de la fertilización orgánica en el cultivo de papa criolla Solanum phureja.]]></article-title>
<source><![CDATA[Agronomía Colombiana]]></source>
<year>2008</year>
<volume>26</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>340-6</page-range></nlm-citation>
</ref>
<ref id="B39">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Osorio]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
<name>
<surname><![CDATA[Habte]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Synergistic influence of an arbuscular mycorrhizal fungus and a P solubilizing fungus on growth and P uptake of Leucaena leucocephala in a Oxisol.]]></article-title>
<source><![CDATA[Arid Land Research and Management]]></source>
<year>2001</year>
<volume>15</volume>
<page-range>263-74</page-range></nlm-citation>
</ref>
<ref id="B40">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Pinilla]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Herrera]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Benavente]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Sanhueza]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Efecto del magnesio en el rendimiento y contenido de gluten en trigo (Triticum aestivum L.) en un suelo Andisol.]]></article-title>
<source><![CDATA[IDESIA]]></source>
<year>2011</year>
<volume>29</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>53-7</page-range><publisher-loc><![CDATA[Chile ]]></publisher-loc>
</nlm-citation>
</ref>
<ref id="B41">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ramírez]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Fournier]]></surname>
<given-names><![CDATA[ML]]></given-names>
</name>
<name>
<surname><![CDATA[Ruepert]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Hidalgo]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Uso de agroquímicos en el cultivo de papa en Pacayas, Cartago, Costa Rica.]]></article-title>
<source><![CDATA[Agronomía Mesoamericana]]></source>
<year>2014</year>
<volume>25</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>337-45</page-range></nlm-citation>
</ref>
<ref id="B42">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Richardson]]></surname>
<given-names><![CDATA[JM]]></given-names>
</name>
<name>
<surname><![CDATA[Mcneill]]></surname>
<given-names><![CDATA[AM]]></given-names>
</name>
<name>
<surname><![CDATA[Prigent-Combaret]]></surname>
<given-names><![CDATA[C.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Adquisition of phosphorus and nitrogen in the rizosphere and plant growth promotion by microorganisms.]]></article-title>
<source><![CDATA[Plant Soil]]></source>
<year>2009</year>
<volume>321</volume>
<page-range>305-39</page-range></nlm-citation>
</ref>
<ref id="B43">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Reganold]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Wachter]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Organic agriculture in the twenty-first century.]]></article-title>
<source><![CDATA[Nature Plants]]></source>
<year>2016</year>
<volume>2</volume>
<page-range>1-8</page-range></nlm-citation>
</ref>
<ref id="B44">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rojas]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[Ortuño]]></surname>
<given-names><![CDATA[N.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Evaluación de micorrizas arbusculares en interacción con abonos orgánicos como coadyuvantes del crecimiento en la producción hortícola del Valle Alto de Cochabamba, Bolivia (en línea)]]></article-title>
<source><![CDATA[Acta Nova]]></source>
<year>2007</year>
<volume>3</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>697-719</page-range></nlm-citation>
</ref>
<ref id="B45">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sánchez]]></surname>
<given-names><![CDATA[DB]]></given-names>
</name>
<name>
<surname><![CDATA[García]]></surname>
<given-names><![CDATA[AM]]></given-names>
</name>
<name>
<surname><![CDATA[Romero]]></surname>
<given-names><![CDATA[FA]]></given-names>
</name>
<name>
<surname><![CDATA[Bonilla]]></surname>
<given-names><![CDATA[RR.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Efecto de rizobacterias promotoras de crecimiento vegetal solubilizadoras de fosfato en Lactuca sativa cultivar White Boston]]></article-title>
<source><![CDATA[Colombiana de Biotecnología]]></source>
<year>2014</year>
<volume>16</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>122-8</page-range></nlm-citation>
</ref>
<ref id="B46">
<nlm-citation citation-type="book">
<collab>SEPSA (Secretaría Ejecutiva de Planificación Sectorial Agropecuaria).</collab>
<article-title xml:lang=""><![CDATA[Boletín Estadístico Agropecuario]]></article-title>
<source><![CDATA[]]></source>
<year></year>
<numero>21</numero>
<issue>21</issue>
<publisher-name><![CDATA[Área de Estadística Económicas e Información. SEPSA]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B47">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Soto]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Abonos orgánicos, producción y uso de compost.]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Meléndez]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Molina]]></surname>
<given-names><![CDATA[E (]]></given-names>
</name>
</person-group>
<source><![CDATA[Fertilidad de suelos y manejo de la nutrición de cultivos en Costa Rica, 2001]]></source>
<year>2001</year>
<page-range>45-63</page-range><publisher-loc><![CDATA[San José, Costa Rica ]]></publisher-loc>
<publisher-name><![CDATA[Laboratorio de Suelos y Foliares, CIA/UCR,]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B48">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Soto]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Descamps]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
</person-group>
<source><![CDATA[Certificación orgánica paso a paso: manual para familias productoras]]></source>
<year>2011</year>
<page-range>2</page-range><publisher-loc><![CDATA[Turrialba, Costa Rica ]]></publisher-loc>
<publisher-name><![CDATA[CATIE]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B49">
<nlm-citation citation-type="">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Suárez]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Giletto]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Rattín]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Echeverría]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Caldiz]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
</person-group>
<source><![CDATA[Efecto del nitrógeno sobre el rendimiento y la calidad de tubérculos en papa para industria.]]></source>
<year>2006</year>
<volume>32</volume>
<page-range>19-21</page-range></nlm-citation>
</ref>
<ref id="B50">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Tein]]></surname>
<given-names><![CDATA[B]]></given-names>
</name>
<name>
<surname><![CDATA[Kauer]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
<name>
<surname><![CDATA[Eremeev]]></surname>
<given-names><![CDATA[V]]></given-names>
</name>
<name>
<surname><![CDATA[Luik]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Selge]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Loit]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Farming systems affect potato (Solanum tuberosum) tuber and soil quality.]]></article-title>
<source><![CDATA[Field Crops Research]]></source>
<year>2014</year>
<volume>156</volume>
<page-range>1-11</page-range></nlm-citation>
</ref>
<ref id="B51">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Zamora]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Tua]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Torres]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Evaluación de cinco fuentes orgánicas sobre el desarrollo vegetativo y rendimiento del cultivo de papa.]]></article-title>
<source><![CDATA[Agronomía Tropical]]></source>
<year>2008</year>
<volume>58</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>233-43</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
