<http://aims.fao.org/aos/agrovoc/xDef_b27e0bab> <http://www.w3.org/1999/02/22-rdf-syntax-ns#value> "A material that lowers the surface tension of the system to which it is added."@en . <http://aims.fao.org/aos/agrovoc/xDef_b27e0bab> <http://art.uniroma2.it/ontologies/vocbench#hasSource> "Tacon, A.G.J., 1987. The nutrition and feeding of farmed fish and shrimp - A training manual 2. Nutrient sources and composition. FAO Field Document. Project GCP/RLA/075/ITA, Field Document No. 5/E Brasilia, Brazil, 129 p. https://www.fao.org/4/ab468e/AB468E00.htm" . <http://aims.fao.org/aos/agrovoc/xDef_b27e0bab> <http://purl.org/dc/terms/created> "2024-09-04T16:06:17"^^<http://www.w3.org/2001/XMLSchema#dateTime> .