State the Designations for Horizons 

Of the several horizons, the master horizons are the results of the fundamental soil forming processes, viz. humification, eluviation  and  illuviation. The master horizons and layers of soils are represented by the capital letters O, A, E, B, C, and R.  Here, O represents organic horizon at the surface; A, E, B, and C are the mineral horizons while the symbol R is for the hard bedrock. These soil horizons are not necessarily present in every soil.