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mads.xsd"><authority><topic authority="http://roble.intecca.uned.es/tematres/lem/">Nivelación de tierras</topic></authority><related type="other"><topic>Drenaje</topic></related><related type="other"><topic>Labranza</topic></related><related type="other"><topic>Riego</topic></related><related type="other"><topic>Suelos-Conservación</topic></related><variant type="other"><topic>Sistematización de tierras</topic></variant><variant type="other"><topic>Terraplenado</topic></variant><variant type="other"><topic>Aterrazamiento</topic></variant><variant type="other"><topic>Planeamiento de tierras</topic></variant><variant type="other"><topic>Abancalado</topic></variant><variant type="other"><topic>Abancalamiento</topic></variant></mads>