@prefix nalt: <https://lod.nal.usda.gov/nalt/> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix dc: <http://purl.org/dc/terms/> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
@prefix ns0: <https://lod.nal.usda.gov/naltv#> .

nalt:213766
  skos:prefLabel "toscas"@es, "hardpans"@en ;
  a <https://lod.nal.usda.gov/naltv#Topic>, skos:Concept ;
  skos:narrower nalt:306927 .

<https://lod.nal.usda.gov/naltv#Topic>
  rdfs:label "Topic"@en ;
  a owl:Class .

nalt:306927_def
  rdf:value "Del latín durus, duro; capa dura. Horizonte en el subsuelo, cementado por la sílice iluvial a un grado tal que menos del 50 % del volumen de fragmentos secados al aire se enfrían en el agua o durante una inmersión prolongada en ácido clorhídrico (HCL). Pueden variar en cuanto al grado de cementación por sílice. Comúnmente contienen cementos adicionales, principalmente carbonato de calcio."@es, "A duripan (L. durus, hard; meaning hardpan) is a subsurface horizon that is cemented by illuvial silica to the degree that less than 50 percent of the volume of air-dry fragments slake in water or during prolonged soaking in acid HCl). Duripans vary in the degree of cementation by silica. In addition, they commonly contain accessory cements, chiefly calcium carbonate."@en ;
  dc:source "US, Environmental Protection Agency" ;
  a <https://lod.nal.usda.gov/naltv#Definition> .

nalt:21098
  skos:prefLabel "carbonato de calcio"@es, "calcium carbonate"@en ;
  a <https://lod.nal.usda.gov/naltv#Chemical>, skos:Concept ;
  skos:related nalt:306927 .

nalt:306927
  skos:prefLabel "duripans"@en, "duripán"@es ;
  skos:related nalt:56445, nalt:21098 ;
  a skos:Concept, <https://lod.nal.usda.gov/naltv#Topic> ;
  skos:definition nalt:306927_def ;
  dc:created "2017-08-16"^^xsd:date ;
  skos:hiddenLabel "duripan"@en ;
  skos:inScheme <https://lod.nal.usda.gov/nalt> ;
  dc:modified "2017-11-10"^^xsd:date ;
  skos:broader nalt:213766 ;
  ns0:marc001 "81198" .

<https://lod.nal.usda.gov/nalt>
  rdfs:label "NALT Full"@en ;
  a skos:ConceptScheme .

nalt:56445
  skos:prefLabel "sílice"@es, "silica"@en ;
  a ns0:Chemical, skos:Concept ;
  skos:related nalt:306927 .