What was one of the main causes of the dustbowl?

The main causes of dust bowl were:

Farmers and ranchers destroyed the grass that held the soil in place lack of rain in consecutive years or draught. soil erosion, wind erosion farmers had basically over aerated the soil of The Great Plains. unusually high temperatures poor agricultural practices farmers did not follow dry land farming methods.

The DustBowl was caused by following factors:

farm economics

changes in regional weather

federal land policies