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

<https://lod.nal.usda.gov/naltv#marc001> rdfs:label "Field 001 in MARC Authority Format"@en .
nalt:27783_def
  a <https://lod.nal.usda.gov/naltv#Definition> ;
  rdf:value "Suelo congelado permanentemente; por lo general se refiere a una capa que se encuentra a cierta profundidad bajo la superficie del suelo. A cualquier capa que se encuentre sobre este y que se derrita en verano se le llama capa activa."@es, "Permanently frozen ground; generally refers to a layer at some depth below the soil surface. Any layer above it, which thaws in summer, is termed the active layer."@en ;
  dc:source "Burns, Russell M. and Barbara H. Honkala, tech. coords. Silvics of North America, vol 2. Hardwoods; Glossary. Agriculture handbook no. 654. U.S. Department of Agriculture, Forest Service, 1990" .

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

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

nalt:27783
  a skos:Concept, <https://lod.nal.usda.gov/naltv#Topic> ;
  dc:created "2006-01-19"^^xsd:date ;
  dc:modified "2017-06-02"^^xsd:date ;
  skos:altLabel "permafrost areas"@en ;
  skos:broader nalt:26939 ;
  skos:definition nalt:27783_def ;
  skos:exactMatch agrovoc:c_5715, <http://id.agrisemantics.org/gacs/C24038>, <http://id.cabi.org/cabt/87457>, <http://id.loc.gov/authorities/subjects/sh2005001377> ;
  skos:inScheme <https://lod.nal.usda.gov/nalt>, <https://lod.nal.usda.gov/nalt-core> ;
  skos:prefLabel "permafrost"@en, "hielo permanente"@es ;
  skos:related nalt:26886, nalt:301420, nalt:41634 ;
  ns0:marc001 "27824" .

nalt:26886
  a ns0:Topic, skos:Concept ;
  skos:prefLabel "suelos fríos"@es, "cold soils"@en ;
  skos:related nalt:27783 .

nalt:301420
  a ns0:Topic, skos:Concept ;
  skos:prefLabel "suelos helados"@es, "frigid soils"@en ;
  skos:related nalt:27783 .

nalt:41634
  a ns0:Topic, skos:Concept ;
  skos:prefLabel "frozen soils"@en, "suelos congelados"@es ;
  skos:related nalt:27783 .

nalt:26939
  a ns0:Topic, skos:Concept ;
  skos:narrower nalt:27783 ;
  skos:prefLabel "características morfológicas del suelo"@es, "soil morphological features"@en .