What were the advantages of these mechanical devices to the big farmers of the Great Plains ?

(i) The prices of wheat were high and demand was limitless, the new
machines helped farmers to rapidly clear large tracts, break up the soil,
remove the grass and prepare the ground for cultivation.
(ii) Now the work could be done quickly and with a minimum number of
hands.
(iii) With power’-driven machines, farmers could plough, seed and harvest
2,000 to 4,000 acres of wheat in a season.