AGROVOC Variation Ontology Source
http://aims.fao.org/aos/agrovoc/c_7939 http://purl.obolibrary.org/obo/VariO_0222 LOOM
http://aims.fao.org/aos/agrovoc/c_24400 http://purl.obolibrary.org/obo/VariO_0224 LOOM