Système de classification des sols: 1. USDA 2. Aashto 3. USCS
Système de classification des sols:
1. USDA (système de classification texturale triangulaire du Département américain de l'agriculture)
2. Aashto (America Association of State Highway and Transportation Officiel Système de classification)
3. USCS (système de classification des sols unifiés)
January 22, 2026
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