In what way was new technology responsible for the dramatic expansion of land in America ?

(i) With the new technology, the settlers modified their implements to meet
their requirements.
(ii) In the mid-western prairie, simple ploughs were ineffective as it was
covered with a thick mat of grass with tough roots.
(iii) To break the sod and turn the soil over, a variety of new ploughs were
devised.
By the early 20th century, the farmers in the Great Plains were using
tractors and disk ploughs, clearing vast stretches for wheat cultivation.