The dramatic expansion in American wheat production was due to use of new technology.
The different ways in which new technology dramatically increased wheat production in the USA are
(i) To break the sod and turn the soil over, a variety of new ploughs were devised locally, some of them 12 feet long. Their front rested on small wheels and they were hitched on to six yokes of oxen or horses.
(ii) By the early 20th century, farmers in the great plains were breaking the ground with tractors and disk ploughs for wheat cultivation.
(iii) Before the 1830s, the grain used to be harvested with a cradle or sickle. But the mechanical reaper invented by Cyrus McCormick in 1831, could cut in 1 day as much as 5 men could cut with cradles and 16 men with sickles.
(iv) By the early 20th century, big farmers used
combined harvester, power driven machinery to plough vast areas of land for wheat production.