Describe different layer of soil profile

The soil profile is the layers of soil found when we go deeper into the ground. There are three main layers of soil – top soil, subsoil and parent rock.
Topsoil ( A – horizon):Top soil is the upper most layer of the soil which is made up of humus and small particles of rocks. It is dark in colour due to the presence of humus. Plants grow in this soil as humus makes this layer porous and fertile.
Sub soil (B – horizon): It is the layer situated below the topsoil. This layer does not have much humus and thus lighter in colour. Bits of rocks and some nutrients are the main constituents of this layer. Rain water collects in this layer.
Parent rock (C – horizon): Parent rock is the layer below the subsoil which consists of pieces of rocks with cracks and crevices. Below parent rock is the layer of solid rock called bedrock. Water table is formed over it.