@prefix agrovoc: <http://aims.fao.org/aos/agrovoc/> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix ns0: <http://art.uniroma2.it/ontologies/vocbench#> .
@prefix dc: <http://purl.org/dc/terms/> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .

agrovoc:xDef_e4b5a36c
  rdf:value "This term refers to a reading or value obtained with a SPAD (Soil Plant Analysis Development) chlorophyll meter, a device that non-destructively measures the amount of chlorophyll in plant leaves. These values ​​indicate the plant's health and are used to optimize fertilizer use, especially nitrogen."@en ;
  ns0:hasSource "Adapted from Xiong, D., Chen, J., Yu, T. et al. SPAD-based leaf nitrogen estimation is impacted by environmental factors and crop leaf characteristics. Sci Rep 5, 13389 (2015). https://doi.org/10.1038/srep13389" ;
  dc:created "2025-12-08T13:32:13"^^xsd:dateTime .

agrovoc:c_9c738133 skos:definition agrovoc:xDef_e4b5a36c .