Paddy is grown in Ganga-Brahmaputra plain because the rivers bring very fertile soil called alluvium, which is one of the best soil for agriculture. This soil gets deposited in the plains that is why plains are usually fertile. Paddy needs a lot of water for growth and getting water beside a river is easy. The Ganga-Brahmaputra plains provide flat, fertile land for thecultivationof crops. The amount of rainfall in this region is also quite high.