Use CAPITAL letters to identify master horizons (O, A, E, B, C, R). Use suffixes (lowercase letters) to denote additional characteristics or features of the horizon:
Ap - plowed A horizon.
Bg - Gleyed B horizon.
2Cd - Dense C -horizon, the 2 tells that the C horizon is a different deposit than the B.
When describing a pedon, examine the pit completely, decide where horizon breaks are (use something to mark breaks like a large nail or golf tee), describe each horizon (color, texture, structure, etc.), then decide the proper horizon name and labels.
