Which part of the soil contains humus?

🔑Key Points:A. Horizon or Surface soil
-It is the part of the topsoil.
-In this layer, organic matter is mixed with mineral matter.
-It is the layer of mineral soil with the most organic matter accumulation and soil life.
-Nutrients like iron, aluminium, clay, and organic matter are sometimes dissolved and carried out in this layer.
-This layer is depleted of (eluviated of) iron, clay, aluminium, organic compounds, and other soluble constituents.
-When depletion is pronounced, a lighter-coloured “E” subsurface soil horizon is apparent at the base of the “A” horizon.

🔴Additional Information:
Soil Profile: 
-It is the vertical section of soil from all its horizons. 
-There are different types of soil, each with its own set of characteristics.
-It is made of layers, or horizons (O, A, E, B, C, R). 
-Put the horizons together, and they form a soil profile.
-Most soil profiles cover the earth as 2 main layers Topsoil and Subsoil.
-Most soils have three major horizons (A, B, C) and some have an organic horizon (O).