Answer:
Poor agricultural practices
Step-by-step explanation:
Hi there,
When people use farmland, they are supposed to leave the land fallow. This means that the land is left alone so it can restore its fertility.
For farmers in that region of the US at the time, they continued to overwork their farmland and destroyed the fertility of the land. In addition, severe droughts worsened the situation and caused once fertile lands into deserts.
I hope this was helpful. Good luck in your studies. :^)
- a former AP US student