I1L1L1U1V4I1A1
10 points
ILLUVIA is validvalid
ILLUVIUM, a type of material accumulated in soil [n]
ILLUVIUM, material removed from the soil layer by rainwater and deposited in a lower layer [n]
ILLUVIUM, a type of material accumulated in soil [n]
ILLUVIUM, material removed from the soil layer by rainwater and deposited in a lower layer [n]