Soil developed on sub-recent alluvial soil; light gray (10YR 7/1, 7/2) to light brownish gray (10YR 6/2); many red plinthite (2.5YR 4/6); clay; moderate; medium to coarse subangular and angular blocky; slightly firm; deep; somewhat poorly drained; occurs on flat to undulating terrain; cation exchange capacity 10-15 cmol (+) per kg soil; low base saturation; argillic diagnostic horizon.