Question

How did machine brought misery for poor farmer

Answer 1

The big farmers of USA bought the new reaper machine. Then the work could be done quickly with minimum number of labourers. Mechanisation reduced the need for labour and created unemployment. Some small-scale farmers even bought these machines, with the loans banks offered them, but found it extremely difficult to pay back, when the demand decreased after the First World War.
These farmers left their farms and ventured out in search of employment. But jobs were also difficult to find out due to mechanisation.
Thus, it can be concluded that machines brought misery for the poor farmers.