Soil health knowledge graph

This repository hosts an open-source soil health knowledge graph (KG) alongside its supporting ontologies and example SPARQL queries. The KG is designed to unify fragmented interpretations of soil health—a concept variably defined across research, policymaking, and agriculture—by structuring insights mainly from the European Environment Agency’s report Soil Monitoring in Europe: Indicators and Thresholds for Soil Health Assessments. The KG leverages SKOS (Simple Knowledge Organization System) as its core framework to model soil health concepts, soil threat indicators and their critical thresholds, while Dublin Core standardizes metadata for references in the report. Relationships between entities are semantically defined using existing ontologies like Agrontology and OBO Relation Ontology. The KG is linked to external vocabularies such as AGROVOC, GloSIS and ISO 11074 (soil quality standard). The soil health knowlegde graph is documented with a HTML page generated with the Widoco tool. This page can be accessed at https://soilwise-he.github.io/soil-health. The SPARQL endpoint: https://repository.soilwise-he.eu/sparql.