Question

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Answer 1

1. Differences :

Khadar

(i) These are the new alluvium deposited recently.

(ii) These are fine and fertile.

(iii) These are found near the river in the flood plains and deltas.

(iv) These are sandy and light in colour.

Bangar

(i) These are the old alluvium deposited in the recent past.

(ii) These are coarse and less fertile. (presence of ‘Kankar’ nodules)

(iii) These are found away from the river especially along the foothills.

(iv) These are clayey and dark in colour.

2. Alluvial soils are formed by the deposition of materials brought down by the rivers. This process of deposition continues for millions of years leading to accumulation of soil into thick layers.

These have been deposited by three important Himalayan rivers namely the Indus, Ganga and the Brahmaputra.

3. a) Ploughing across elevation contour lines. ...

b) Practicing terrace farming: This is where graduated steps of land are made on the slope to control soil erosion.

c)Planting strips of grass: Grass on the slopes acts as water and wind breaker, therefore limiting the process of erosion.

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