Question

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> Describe the different layers in soil profile.

Answer 1

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> Different layers of the soil are referred to as horizons.
-The uppermost layer, the topsoil, also known as A-horizon is generally dark in colour and fertile as it is rich in humus and minerals. This layer is generally soft, porous, and can retain more water. This provides shelter for many living organisms such as worms, rodents, moles, and beetles. The roots of small plants are embedded entirely in the topsoil.
-The next layer, the middle layer called B-horizon has a lesser amount of humus but more minerals. This layer is generally harder and more compact.
-The third layer is the C-horizon which is made up of small lumps of rocks with cracks and crevices.
-Below this layer is the bedrock, which is hard and difficult to dig with a spade. Water can be held in tiny gaps.