BioportalWebUi

URI*	https://srv.ktbl.de/ontologies/SoilTexture https://srv.ktbl.de/ontologies/SoilTexture
Bug database	https://github.com/fairagro/SoilTextureOntology/issues https://github.com/fairagro/SoilTextureOntology/issues
Contact*	Daniel Martini (d.martini@ktbl.de)
Object creation date property	http://purl.org/dc/elements/1.1/created http://purl.org/dc/elements/1.1/created
Submission date	August 11, 2026
Deprecated	false See more...
Description*	This ontology contains a description of soil texture classes determined by sand, clay and silt fractions. It contains inference rules and can be used to translate data that contains numeric soil grain size fractions determined in the lab into their soil texture classification counterpart (and vice versa from classes to clay/silt/sand fraction ranges). The ontology has initially been created based upon the German soil texture classification system as described in the Bodenkundliche Kartieranleitung, edition 4 (KA4 - in particular table 26 on page 135 of that document). It has been cross-checked against the most recent 6th edition of the Kartieranleitung with no need for changes being observed. Thus, at the moment it covers requirements for being used as descriptors for datasets only that have been recorded according to that system. The ontology however is easily extensible and using the existing class definitions and hierarchy as a template, basically any different soil texture classification system can be added, like the USDA system, which has different grain diameter limits. Maintenance is done in this github repo: https://github.com/fairagro/SoilTextureOntology/. Feel free to send patches/pull requests for that - also if you spot errors. See more...
Documentation	https://github.com/fairagro/SoilTextureOntology https://github.com/fairagro/SoilTextureOntology
Creator	Daniel Martini d.martini@ktbl.de
Subject	http://aims.fao.org/aos/agrovoc/c_7156 See more... http://aims.fao.org/aos/agrovoc/c_15578 See more... http://aims.fao.org/aos/agrovoc/c_15619 See more... http://aims.fao.org/aos/agrovoc/c_6779 See more... http://aims.fao.org/aos/agrovoc/c_7199 See more...
Formality level	http://w3id.org/nkos/nkostype#ontology http://w3id.org/nkos/nkostype#ontology
License
Representation language*	OWL See more...
Syntax	http://www.w3.org/ns/formats/Turtle http://www.w3.org/ns/formats/Turtle
Homepage	https://github.com/fairagro/SoilTextureOntology https://github.com/fairagro/SoilTextureOntology
Indexed or included in catalog or repository	https://agroportal.eu/ data.agroportal.eu https://agroportal.eu agroportal.eu
Has equivalences with	https://agroportal.eu/ontologies/AGROVOC AGROVOC
Generic type	http://omv.ontoware.org/2005/05/ontology#DomainOntology http://omv.ontoware.org/2005/05/ontology#DomainOntology
Key classes	https://srv.ktbl.de/ontologies/SoilTexture#SoilTexture See more...
Known usage	FAIR Data Annotation: Enriches soil datasets with persistent URIs and standardized metadata to make them machine-readable and interoperable. See more... Modeling & Analytics: Provides consistent feature definitions for soil texture variables used in machine learning workflows and crop simulation models. See more... Data Harmonization: Maps different national soil classification schemes (e.g., USDA, WRB, KA5) to a single unified semantic framework for cross-dataset analysis. See more...
Metadata vocabulary used	http://www.w3.org/2002/07/owl# http://www.w3.org/2002/07/owl# http://www.w3.org/2000/01/rdf-schema# http://www.w3.org/2000/01/rdf-schema# http://purl.org/dc/terms/ http://purl.org/dc/terms/ http://www.w3.org/2004/02/skos/core# http://www.w3.org/2004/02/skos/core#
Modification date	November 7, 2025
Object modification date property	http://purl.org/dc/elements/1.1/modified http://purl.org/dc/elements/1.1/modified
Natural language
Preferred namespace prefix	sto See more...
Preferred namespace URI	https://srv.ktbl.de/ontologies/SoilTexture# https://srv.ktbl.de/ontologies/SoilTexture#
Publisher	KTBL
Creation date*	September 30, 2022
Repository	https://github.com/fairagro/SoilTextureOntology https://github.com/fairagro/SoilTextureOntology
Source	The ontology has initially been created based upon the German soil texture classification system as described in the Bodenkundliche Kartieranleitung, edition 4 (KA4 - in particular table 26 on page 135 of that document). It has been cross-checked against the most recent 6th edition of the Kartieranleitung with no need for changes being observed. See more...
Status*	beta See more...
URI Lookup Endpoint	https://agroportal.eu/search?ontologies=STO&require_exact_match=true&q= search?ontologies=STO&require_exact_match=true&q=
Identifier pattern	https://srv.ktbl.de/ontologies/SoilTexture# See more...
Created with	Protégé See more...

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