Question

According to the USDA classification, which particle size defines “clay”?

The USDA classifies clay as particles smaller than 0.002 mm. Silt ranges from 0.0020.05 mm, and sand is larger.

A <0.002 mm

B 0.002–0.05 mm

C 0.05–0.10 mm

D 0.10–0.25 mm

E >2.00 mm

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