PLEASE HELP: Why was the topsoil in the plains of Texas vulnerable to windstorms in the 1930s?

When a drought struck the area beginning in the early 1930s, many crops failed, leaving the topsoil exposed and vulnerable to being blown away in the windstorms that ripped through the region.

Explanation:

When severe drought struck the Great Plains region in the 1930s, it resulted in erosion and loss of topsoil because of farming practices at the time. The drought dried the topsoil and over time it became friable, reduced to a powdery consistency in some places. Without the indigenous grasses in place, the high winds that occur on the plains picked up the topsoil and created the massive dust storms that marked the Dust Bowl period. The persistent dry weather caused crops to fail, leaving the plowed fields exposed to wind erosion.

answer: 25.8 years old or 25 years old