The upper limit of clay sized particles and the lower limit of gravel across both the USDA and IUSS classification systems is:
(A). 0.002 mm
(B). 0.005 mm
(C). 5.0 mm
(D). 2.0 mm
Choose the correct answer from the options given below:
Show Hint
Remember the universal agreement between classification systems (USDA, IUSS, ISSS):
Upper limit of clay = \( 0.002 \text{ mm} \).
Upper limit of sand (lower limit of gravel) = \( 2.0 \text{ mm} \).