@prefix nalt: <https://lod.nal.usda.gov/nalt/> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .
@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#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix owl: <http://www.w3.org/2002/07/owl#> .

nalt:26766
  skos:prefLabel "calidad del agua"@es, "water quality"@en ;
  a <https://lod.nal.usda.gov/naltv#Topic>, skos:Concept ;
  skos:related nalt:333471 .

nalt:46277
  skos:prefLabel "conductividad hidráulica"@es, "hydraulic conductivity"@en ;
  a <https://lod.nal.usda.gov/naltv#Topic>, skos:Concept ;
  skos:related nalt:333471 .

nalt:333471_def
  rdf:value "Medida de la cantidad de sodio (Na) en relación con el calcio (Ca) y el magnesio (Mg) en el extracto acuoso de la pasta de suelo saturado. Se trata de la razón de la concentración de Na dividida por la raíz cuadrada de la mitad de la concentración de Ca + Mg. Los suelos con valores de razón de absorción de sodio de 13 o superiores se caracterizan por una dispersión creciente de materia orgánica y partículas de arcilla, una conductividad hidráulica saturada y una aireación reducidas y una degradación general de la estructura del suelo."@es, "Sodium adsorption ratio is a measure of the amount of sodium (Na) relative to calcium (Ca) and magnesium (Mg) in the water extract from saturated soil paste. It is the ratio of the Na concentration divided by the square root of one-half of the Ca + Mg concentration. Soils that have SAR values of 13 or more may be characterized by an increased dispersion of organic matter and clay particles, reduced saturated hydraulic conductivity (Ksat) and aeration, and a general degradation of soil structure."@en ;
  dc:source "United States Department of Agriculture, Natural Resources Conservation Service, Soil Survey Staff" ;
  a <https://lod.nal.usda.gov/naltv#Definition> .

nalt:333471
  skos:prefLabel "sodium adsorption ratio"@en, "razón de absorción de sodio"@es ;
  dc:modified "2019-11-25"^^xsd:date ;
  skos:hiddenLabel "Na adsorption ratio"@en, "Na-adsorption-ratio"@en, "sodium adsorption ratios"@en, "sodium-adsorption ratio"@en, "Na-adsorption ratio"@en, "sodium-adsorption ratios"@en ;
  skos:related nalt:958, nalt:46277, nalt:16017, nalt:5084, nalt:26766 ;
  a skos:Concept, <https://lod.nal.usda.gov/naltv#Topic> ;
  skos:broader nalt:2179 ;
  skos:definition nalt:333471_def ;
  ns0:marc001previous "94662" ;
  dc:created "2019-08-30"^^xsd:date ;
  skos:inScheme <https://lod.nal.usda.gov/nalt> ;
  ns0:marc001 "9813980912000041" .

nalt:16017
  skos:prefLabel "sistemas de irrigación"@es, "irrigation systems"@en ;
  a ns0:Topic, skos:Concept ;
  skos:related nalt:333471 .

nalt:2179
  skos:prefLabel "mediciones"@es, "measurement"@en ;
  a ns0:Topic, skos:Concept ;
  skos:narrower nalt:333471 .

ns0:Topic
  rdfs:label "Topic"@en ;
  a owl:Class .

nalt:5084
  skos:prefLabel "propiedades del suelo"@es, "soil properties"@en ;
  a ns0:Topic, skos:Concept ;
  skos:related nalt:333471 .

nalt:958
  skos:prefLabel "degradación del suelo"@es, "soil degradation"@en ;
  a ns0:Topic, skos:Concept ;
  skos:related nalt:333471 .

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