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      <title>Ensayo de analisis historico, social y economico de la cangahua en el Ecuador</title>
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    <abstract>El problema de la erosion, de la produccion de alimentos, de la poblacion y, particularmente, de la cangahua se abordan en este articulo. Se demuestra una serie de relaciones causa-efecto que son muy esclarecedoras para comprender las implicaciones de la utilizacion de los recursos naturales en los procesos agroproductivos, en especial en el caso de los suelos sobre cangahua, asunto de extraordinaria importancia para la agricultura interandina, fuente importante de produccion de alimentos de consumo interno en el pais. (Résumé d'auteur).</abstract>
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      <topic>AGRICULTURE</topic>
      <topic>ECONOMIE RURALE</topic>
      <topic>HISTOIRE</topic>
      <topic>REFORME AGRAIRE</topic>
      <topic>PRATIQUE CULTURALE</topic>
      <topic>SOL CULTIVE</topic>
      <topic>EROSION</topic>
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      <topic>CANGAHUA</topic>
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        <title>Geografia agraria : esbozos de la problematica agraria en el Ecuador</title>
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        <publisher>Colegio de Geografos</publisher>
        <dateIssued key="date">1993</dateIssued>
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      <titleInfo>
        <title>Estudios de Geografía</title>
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    <identifier type="isbn">9978-84-175-X</identifier>
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