Question

Availability of water and minerals in the soil for maximum absorption by roots is in the:

• A. B-horizon
• B. C-horizon
• C. A-horizon
• D. Surface of soil

Answer 1

The correct option is C

A-horizon

The correct option is C.

Explanation of the correct option:

1. The A horizon of the soil profile contains water and minerals in the soil that are readily absorbed by roots.
2. Horizons are the name for these layers.
3. A-horizon (topsoil), B-horizon (subsoil), and C-horizon (soil) are the three major soil layers.
4. The A-uppermost horizon's layer is the part of the soil profile that is best for plant growth because
5. It contains a lot of hummus, which gives plants the nutrients they need to flourish.
6. It is more capable of retaining water since it is soft and porous.
7. Less humus but more minerals can be found in the following stratum.

Explanation of the incorrect options:

Option A:

1. Less humus but more minerals can be found in the following stratum.
2. The middle layer, often known as the B-horizon, is typically harder and more compact.

Option B:

1. There is a substantial bed of hard rocks below the C horizon.
2. It is not regarded as soil because it cannot be excavated with a shovel and is unfit for either plant growth or life survival.

Option D:

1. The surface layer of soil contains detritus, leaf litter, and organic material.
2. It is in contact with air.
3. It is not suitable for roots because it is not abundant in minerals.

Final Answer:- Availability of water and minerals in the soil for maximum absorption by roots is in the A-horizon.