The old alluvial soil of the Ganga plain is called-

Which is the most fertile soil in India?

Where is Sariska Bird Sanctuary located?

Which among the following elements increases the absorption of water and calcium in plants?

Atomic bomb theory is based on-

When a body falls from an aeroplane, there is increase in its 

Wind speed is measured by which of the following instruments-

Which continent is called 'Plateau Continent'?