Old alluvial soil is known as:

Correct option is D

The correct answer is (d) Bangar

Explanation:

Bangar refers to the old alluvial soil, which is typically found in the higher regions of floodplains. It is older than Khadar (the newer alluvial soil) and is generally less fertile due to its older age and the leaching of minerals over time.

Information Booster:

• Bangar soil is typically found in the upper part of river terraces and is covered with a layer of clay. It has a low moisture retention capacity compared to newer alluvial soils.
• The main feature of Bangar is that it contains kankar (lime nodules), making it less fertile.

Additional Knowledge:

• Regur is also known as black soil and is rich in iron, calcium, and magnesium, making it highly fertile, especially for cotton cultivation.
• Arid soils are found in dry regions and lack sufficient moisture for cultivation.
• Khadar is newer alluvial soil found in the lower part of river terraces and is more fertile than Bangar because it has been replenished by fresh deposits from flooding rivers.