How did human error cause the dust bowl?

High prices for wheat encouraged farmers to plow under thousands of acres of grasslands.

Explanation:

Remember they are asking what Human error helped to cause the Dust Bowl.  Rainfall is not human error, Crop rotation helped the soil not led it to thin topsoil, and the government did not keep famers from making decisions.

the virginia plan called for three branches of government and two houses of congress. representation in each house would be determined by population. the new jersey plan called for three branches of government and a single house of congress. each state would have an equal vote.