Question

why plants root grow in top soil region.​

Answer 1

Answer:

There is generally a high concentration of roots in this layer as plants obtain much of their vital nutrients here. Accurate depth of the topsoil layer is measured as the depth of the surface to the first densely packed soil layer known as subsoil.

Answer 2

Answer:

Aerial roots are roots that grow on the above-ground parts of a plant. ... Plants that live in marshes and bogs have underground roots but they can't absorb gasses from the air. These plants produce above ground “breathing roots” to help them with air exchange

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