write an accont on dramatic expansion of wheat production in usa and what were the results of wheat agriculture in the great plains?

Due to paucity of time all aspects of your query could not be answered.

The use of the following technologies helped to increase wheat production:

• tractors and disk ploughs
• mechanical reaper
• combined harvesters
• The new machines allowed these big farmers to rapidly clear large tracts, break up the soil, remove the grass and prepare the ground for cultivation. The work could be done quickly and with a minimal number of hands
• ( Source: NCERT class IX text Book)