The A horizon or combined O/A horizons of the soil are known as the ________.
A) subsurface horizon(s)
B) illuviation layer(s)
C) epipedon
D) regolith
E) colloidal layer(s)
Question 2
The unconsolidated parent material beyond the reach of most roots is ________.
A) the A horizon
B) loam
C) the C horizon
D) solum
E) the F horizon