How did the White Americans turn the grasslands into bread baskets of America ?

(i) The urban population in the US was growing and the export market was
becoming even bigger.
(ii) As the demand increased, wheat prices rose encouraging farmers to
produce wheat.
(iii) The spread of the railways made it easy to transport the grain from the
wheat growing regions to the eastern coast for export’
(iv) During the World War, the world market boomed. Russians wheat
supply was cut-off and US had to feed Europe’
(v) US President rightly said, “Plant more wheat, wheat will win the war.”