SSC CHSL 4 Aug 2021 Shift 1 Paper

Horizon A has organic materials incorporated with the mineral matter, nutrients and water. There are different types of soil horizons like $\mathit{O},\mathit{A},\mathit{E},\mathit{B}$, C, R. O (humus or organic), A (topsoil), E (eluviated), B (subsoil), C (parent material), R (bedrock).