Question

Which soil has thin upper layer which is less fertile?​

Answer 1

Answer:

Earthworms are especially important because they dig through the soil and give the roots of plants places to grow, and make spaces for water and air to get into the soil. The topsoil is relatively thin but it has most of the soil's nutrients. Just below the topsoil layer is the subsoil layer.

Answer 2

Answer:

The uppermost layer is called topsoil and this layer contains humus, plant roots, and living creatures. The more humus found in topsoil ,the more nutrient rich the topsoil and the better the condition for growing plants. The middle layer is called subsoil. This contains more clay and less organic matter.

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