Question

Explain the soil horizons.

Answer 1

Instructions:

• Explain each horizon of soil.

Solution:
There are five horizons in soil, they are O, A, B, C and R.
Horizon O – this is the topmost organic layer and is called humus layer.

• Horizon A- it consists of organic matter; leaf litter and decomposed animal remains. This layer is rich in nutrients and is good for crops.
• Horizon B- it is called subsoil.
• It contains clay and has rich deposits of minerals.
• Horizon C- it is called regolith.
• It consists of broken up particles of the parent rock.
• Horizon R- here, in this layer is parent rock found.
• It is the unweathered rock that decides the soil type.