Question

WHY IS THE LAYER MARKED 'A' VERY FERTILE ​

Answer 1

Answer:

highness

Explanation:

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Answer 2

Answer:

The main layers of the soil are topsoil, subsoil and the parent rock. Each layer has its own characteristics.

Explanation:

Horizon A or topsoil :

It is also called the humus layer, which is rich in organic material. This layer consists of decomposed material and organic matter. This is the reason, the topsoil has a dark brown color. The hummus makes the topsoil soft, porous to hold enough air and water. In this layer, the seeds germinate and roots of the plants grow. Many living organisms like earthworms, millipedes, and centipedes, bacteria, and fungi are found in this layer of soil.

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