Diagnostic materials (WRB)

World Reference Base for soil resources
Key principles of classification Diagnostic horizons Properties Materials Reference soil groups RSG qualifiers RSG specifiers

Diagnostic materials

• Artefacts
• Calcaric material
• Colluvic material
• Fluvic material
• Gypsiric material
• Limnic material
• Mineral material
• Organic material
• Ornithogenic material
• Sulphidic material
• Technic hard rock
• Tephric material