<?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>0187-5779</journal-id>
<journal-title><![CDATA[Terra Latinoamericana]]></journal-title>
<abbrev-journal-title><![CDATA[Terra Latinoam]]></abbrev-journal-title>
<issn>0187-5779</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Mexicana de la Ciencia del Suelo A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0187-57792022000100704</article-id>
<article-id pub-id-type="doi">10.28940/terra.v40i0.1294</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Identificación del potencial agrícola de suelos en la Amazonía Ecuatoriana, a partir de variables físico-químicas, microbiológicas y ambientales]]></article-title>
<article-title xml:lang="en"><![CDATA[Identification of the agricultural potential of soils in the Ecuadorian Amazon, from physical-chemical, microbiological and environmental variables]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Tigrero-Zapata]]></surname>
<given-names><![CDATA[Gabriela Jamilex]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Vásconez-Montúfar]]></surname>
<given-names><![CDATA[Gregorio Humberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Ferrer-Sánchez]]></surname>
<given-names><![CDATA[Yarelys]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cedeño-Moreira]]></surname>
<given-names><![CDATA[Angel Virgilio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Nieto-Cañarte]]></surname>
<given-names><![CDATA[Carlos Alberto]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Abasolo-Pacheco]]></surname>
<given-names><![CDATA[Fernando]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Técnica Estatal de Quevedo  ]]></institution>
<addr-line><![CDATA[Los Ríos ]]></addr-line>
<country>Ecuador</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Técnica Estatal de Quevedo Facultad de Ciencias Agropecuarias ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Ecuador</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Facultad de Ciencias de la Ingeniería  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Ecuador</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Laboratorio de Biotecnología  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Ecuador</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Carrera de Agronomía  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Ecuador</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2022</year>
</pub-date>
<volume>40</volume>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0187-57792022000100704&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0187-57792022000100704&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0187-57792022000100704&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: La productividad agrícola de la Amazonía Ecuatoriana es deficiente debido a la mala calidad del suelo, ocasionada por diversos contaminantes. El objetivo del presente estudio fue identificar el potencial agrícola de suelos de la Amazonía Ecuatoriana, a partir de variables físico-químicas, biológicas y ambientales. Para esto, se tomaron 10 muestras de suelo de los principales agroecosistemas. Las variables físico-químicas se determinaron mediante técnicas estandarizadas. Para el conteo de bacterias (UFC/gr) se usó la metodología de recuento en placa y para la descripción ambiental se usaron variables espaciales (distancia a centros poblados) y espectrales (índice de vegetación de diferencia normalizada NDVI, infrarrojo cercano NIR, índice de vegetación mejorado EVI). A partir del pH, carbono orgánico y saturación relativa (Bases y Al+H) se definieron índices de fertilidad potencial (IFP). Se presentó un pH ácido en todos los suelos y un porcentaje de materia orgánica menor al 2%, con un nivel promedio de Al y Al+H de 3.7 y 5.7 mEq 100 mL-1. Las relaciones de Ca Mg-1, Mg K-1 y (Ca+Mg) K-1 fueron de 7.7, 10.2 y 83.4. Se observó una relación significativa directa entre el pH y el Ca y Mg, con coeficientes de correlación de 0.67 y 0.80. El promedio IFP de los suelos fue 0.46, con rango de 0.33-0.65. La concentración de Cd y Pb fue 0.13 y 59.35 mg kg-1. El conteo de bacterias presentó valores altos en dos muestras (2.64×108 y 2.13×108). El 70% de las áreas se corresponden con el uso de suelo tierra agropecuaria-pastizal. La menor variación se observó en el NDVI, que tuvo un promedio de 0.77. El área central de la zona de muestreo tuvo altos niveles de contaminantes (Al, Cd, Pb), así como la zona de influencia alrededor de estos puntos. Es necesario implementar estrategias de remediación, para favorecer las prácticas agrícolas.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Summary: Agricultural productivity in the Ecuadorian Amazon is deficient due to poor soil quality caused by various pollutants. The aim of this study was to identify the agricultural potential of soils in the region of the Ecuadorian Amazon, from variable physicochemical, biological and environmental. The soil samples were taken major agroecosystems. The physicochemical variables were determined by standard techniques. Bacteria (CFU/gr) were determined by counting methodology used in plate. Environmental variables spatial (distance to populated centers) and spectral (normalized difference vegetation index NDVI, near infrared NIR, enhanced vegetation index EVI) variables were used for environmental description. From pH, organic carbon and relative saturation (Bases and A+H) the potential fertility indexes (IFP) were defined. An acid pH was presented in all the soils and percentage of organic matter was lower to 2%. with an average level of A and A+H of 3.7 and 5.7 mEq 100 mL-1. Relations of Ca Mg-1, Mg K-1 and (Ca + Mg) K-1 were 7.7, 10.2 and 83.4. Significant direct relationship between pH and Ca and Mg, with correlation coefficients of 0.67 and 0.80 were observed. IFP average of soil was 0.46, ranging from 0.33 to 0.65. The concentration of Cd and Pb was 0.13 and 59.35 mg kg-1. The bacteria count showed no difference; however, two soils showed the highest values (2.64×108 and 2.13×108 UFC). 70% of areas were in agricultural-pasture land use. The lowest variation was observed in the normalized difference vegetation index which had an average of 0.77. The central area of the sampling area had high levels of pollutants (Al, Cd, Pb) and the zone of influence around these points. It is necessary to implement remediation strategies in the sampling area, to promote agricultural practices.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[agroecosistemas]]></kwd>
<kwd lng="es"><![CDATA[calidad de suelos]]></kwd>
<kwd lng="es"><![CDATA[contaminación]]></kwd>
<kwd lng="es"><![CDATA[remediación]]></kwd>
<kwd lng="en"><![CDATA[agroecosystems]]></kwd>
<kwd lng="en"><![CDATA[soil quality]]></kwd>
<kwd lng="en"><![CDATA[pollution]]></kwd>
<kwd lng="en"><![CDATA[remediation]]></kwd>
</kwd-group>
</article-meta>
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