Question

A. Choose the correct options.
1. Alluvial soil is...
(infertile/very fertile/cracked)
Sundert
​

Answer 1

Answer:

cracked

Alluvial Soil

Nature of the soil

1. soils vary in nature from sandy loam to clay.

2. They are generally rich in potash but poor in phosphorous.

3. The colour of the alluvial soils varies from the light grey to ash grey. Its shades depend on

the depth of the deposition.

4. Older alluvial soil is called Bhangar and new alluvial soil is called Khadar.

5. Old alluvial soil contains Kankar and is less fertile.

Explanation:

Formation: They are mainly derived from the debris brought down from the Himalayas or the silt left out by the retreating sea. Thus they are azonal soils.

Areas: Alluvial soils are widespread in the northern plains and the river valleys. Through a narrow corridor in Rajasthan, they extend into the plains of Gujarat. In the Peninsular region, they are found in deltas of the east coast and in the river valleys.

Soil texture: The alluvial soils vary in nature from sandy loam to clay. These soils are more loamy and clayey in the lower and middle Ganga plain and the Brahmaputra valley. The sand content decreases from the west to east.

Soil Colour: The colour of the alluvial soils varies from the light grey to ash grey depending on the depth of the deposition, the texture of the materials, and the time taken for attaining maturity.

Other Characteristic Features:

In the Upper and Middle Ganga plain, two different types of alluvial soils have developed, viz. Khadar and Bhangar.