English: soil guideline value
Welsh: gwerth canllaw ar gyfer pridd
Subject: Amgylchedd
Welsh definition: Soil Guideline Values (SGVs) are a series of measurements and values used by the Department for Environment, Food and Rural Affairs (DEFRA) to measure contamination of the soil. SGV's include many sub-values and guidelines, most oriented around soil coverage and toxic deposits such as mercury.
Plural: gwerthoedd canllaw ar gyfer pridd