(i) How can you say that soil has evolved over millions of years?

(ii) Name one important constituent of soil that adds fertility to the soil.

How are alluvial soils formed?

Give a geographical reason for each of the following:

(i) Different regions in India have different kinds of soil for agriculture.

(ii) Alluvial soils vary in texture.

(iii) Nearly all types of crops grow well in riverine soils.

(i) Why is soil a valuable resource for India?

(ii) Why is black soil considered a productive soil?