Enumerations

Controlled vocabularies used across the ERW schema. Each enumeration constrains a field to a set of allowed values. Click through for full descriptions and allowed values.

Vocabulary	Used by	Values
Study Type	Article	experimental, modeling, review, perspective
Focus Area	Article	quantification, agronomic, soil_health, social_economic, natural_weathering
Document Type	Article	journal_article, review_article, preprint, thesis, conference_paper, ...
Experimental Scale	ExperimentalSetup	microcosm, mesocosm, field, catchment
Media	QuantificationApproach	soil, water, gas
Measurement	QuantificationApproach	cations, pH, inorganic_carbon, dic, ta, co2_flux, isotopes, ...
Modeling Scale	ModelingDetails	pore, column, field, regional, global
Application Rate Unit	Intervention	t_per_ha, lb_per_acre, ton_per_acre
Particle Size Type	FeedstockCharacteristics	p80, mean, median
Taxonomy System	SoilCharacteristics	USDA, WRB
Water Source	Irrigation	groundwater, surface

Ontology alignment

We are adding meaning URIs from GLOSIS, ENVO, and AGROVOC where applicable. See the individual enum pages for current mappings.