Answer: The growth of the economy created inflation that increased the value of a dollar.
Step-by-step explanation:
Farmers did not gain as much from the roaring twenties as others did for a number of reasons one of them being that the value of the dollar appreciated due to the economic growth of the period.
This along with a tariff war between the United States and other countries meant that exported American agricultural produce was more expensive for people in other countries to buy which reduced the demand for American products.
Less demand meant less sales so the farmers suffered.