I must admit this is very confusing: one gets different types of information from different sources that often contradict one another.
It is said that the main event occurred due to some misguided farming practices; that those practices allowed strong winds to pick up all the topsoil in the area, carry it east, and deposit it into the Atlantic, more or less in toto. This may not be altogether accurate, but that's the impression one gets from reading essays, articles, and the Wikipedia entry pertaining to the Dust Bowl.
That said, various sources maintain that it takes 500 years or more to form 1 inch of topsoil.
Others suggest coyly that the process can be expedited artificially by burying lots of organic garbage and introducing earthworms to it: a few years of this, and voila - we've got topsoil! (Few of them say how many years, exactly, and where's one supposed to get all those earthworms?)
Still other sources say that because of soil erosion and other intriguing factors we may be running out of arable land. And not just in Kansas either, but all over the globe.
With all of the above in mind, my question is: have the areas affected by the Dust Bowl recovered partially, completely, or not at all? How much of that land can be classified as arable once again?