Question

Give a geographic reason for each of the following :
i. Alluvial soil is extremely fertile.
ii. Need for soil conservation.
iii. Reafforestation should be practised extensively.

Answer 1

Geographical reasons:

(i)Alluvial soil is extremely fertile because it is found to a depth of 500 m and rich in humus, lime and potash.

(ii)Soil conservation is required to protect the washing away of the fertile top soil. Draining away of the fertile top soil reduces the content of minerals and nutrients of the land, which may affect the agricultural production.

(iii) The roots of trees hold on to the soil and help in soil conservation. Deforestation exposes the soil to water and wind forces which lead to soil erosion.