This layer of soil is dark in colour as it is rich in humus and minerals. It is generally soft, porous and can retain more water. It is called:
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. topsoil
- The uppermost layer of the soil is rich in humus and minerals and is generally dark in colour.
- The humus makes the soil fertile and rich in minerals, it also provides the soil with abundant nutrients to help plants grow faster.
- Also known as the A-horizon, the top soil retains the most amount of water, thus making it porous which also facilitates the growth of healthy plants.