Question

In the upper valley region, the soil consisting of old aluminium is known as ______.
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Answer 1

Answer:

The alluvial soil consists of various proportions of sand silt and clay. As we move inland towards the river valleys, soil particles appear somewhat bigger in size.

(ii) In the upper reaches of the river valley. i.e., near the place of the break of slope, the soils are coarse. Such soils are more common in piedmont plains such as Duars, Chos and Terai.

(iii) Alluvial soils are very fertile.

Answer 2

Answer:

Alluvial soils. …the Indo-Gangetic floodplain is called khadar and is extremely fertile and uniform in texture; conversely, the old alluvium on the slightly elevated terraces, termed bhangar, carries patches of alkaline efflorescences, called usar, rendering some areas infertile.