Why temperate grassland is called granary of the world?

Temperate grassland is called granary of the world because it is famous for producing wheat at a large scale. It is a fertile grassland with favorable climatic conditions provides wheat and other cereals in a very large quantity.

Explanation:

Temperate grassland is located in the temperate climatic region of the world mainly within 23.5 degree north to 66.5 degree north and 23.5 degree south to 66.5 degree south. These grasslands are known by different regional name in different countries.

Prairies in North America, Pampas in South America, Veldt in Africa, Downs in Australia and Steppe in Eurasia. These grasslands have very fertile soil and productive capacity with favorable climatic condition which help it to produce wheat and other crops in a large quantity.