It is known that the Great Depression officially began when the stock market crashed, which is the sudden drop of prices.
The stock market leveled off in 1933, with the introduction of President Roosevelt's idea, the New Deal.
Even after the Great Depression, commodities, which are farm products farmed and sold in commerce, prices started falling, because so much was being made at the time. Every time more cattle, cotton, or grains were being made, the stock prices were droppig.
The farmers tried "dryland farming", which was farming without immigration, by removing anything that might steal water from the crops. Their main goal was to preserve the soil's moisture. Instead they had made the soil a lot looser, and easier to get blown away and the result of that was something called the Dust Bowl.
The Dust Bowl ravaged the lands, tearing up the crops in its way, and shattering the windows it passed. It left nothing behind but debris, and bare dust. What it also left behind were terrified people, thinking it was the end of the world.
When the Great Depression and the Dust Bowl finally left them, the people who experienced them, never forgot them for the rest of their lives. There are people alive today that still remember the GD and especially the Dust Bowl.