National Agricultural Library Thesaurus
The National Agricultural Library Thesaurus (NALT) is a controlled vocabulary of agricultural terms maintained by the USDA National Agricultural Library. It provides standardized terminology and hierarchical relationships covering agriculture, biology, the environment, and related sciences, and is published as SKOS linked data. NALT is used to semantically align terms in downstream resources such as the Soil Organic Carbon Knowledge Graph (SOCKG), where roughly 61% of the graph's classes and properties are mapped to NALT concepts for consistent terminology and interoperability.
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