@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 ns0: <https://lod.nal.usda.gov/naltv#> .

<https://lod.nal.usda.gov/naltv#marc001previous> rdfs:label "Value previous used for Field 001 in MARC Authority Format"@en .
<https://lod.nal.usda.gov/naltv#marc001> rdfs:label "Field 001 in MARC Authority Format"@en .
nalt:333471_def
  a <https://lod.nal.usda.gov/naltv#Definition> ;
  rdf:value "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, "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 ;
  dc:source "United States Department of Agriculture, Natural Resources Conservation Service, Soil Survey Staff" .

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

nalt:46277
  a ns0:Topic, skos:Concept ;
  skos:prefLabel "conductividad hidráulica"@es, "hydraulic conductivity"@en ;
  skos:related nalt:333471 .

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

nalt:26766
  a ns0:Topic, skos:Concept ;
  skos:prefLabel "calidad del agua"@es, "water quality"@en ;
  skos:related nalt:333471 .

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

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

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