What are the methods in determining the Angle of Repose?

MATERIAL  (CONDITION) ANGLE OF REPOSE

       (IN  DEGREES)

Ashes 40°
Asphalt (crushed) 30–45°
Bark (wood refuse) 45°
Bran 30–45°
Chalk 45°
Clay (dry lump) 25–40°
Clay (wet excavated)            15°
Clover seed 28°
Coconut (shredded) 45°
Coffee bean (fresh) 35–45°
Earth 30–45°
Flour (corn)           30–40°
Flour (wheat) 45°
Granite 35–40°
Gravel (loose dry) 30–45°
Gravel (natural w/ sand) 25–30°
Malt 30–45°
Sand (dry) 34°
Sand (water filled) 15–30°
Sand (wet)  45°
Snow 38°
Urea (Granular) 27°
Wheat 27°

VIKASH KUMAR