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A reference point from which measurements may be indicated or made (e.g. topographic elevations, tidal observations) or a standard, problem or test that serves as a basis for evaluation, judgement or comparison.

FAO (2022) AGROVOC Multilingual Thesaurus. Available at: https://agrovoc.fao.org/browse/agrovoc/en/ (Accessed: 10 July 2023).

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