The Ozark Hills began about a bizillion years ago as a high plateau. Over the eons, the hundreds of springs, streams and rivers of this area eroded down through the layers of soil and sedimentary rock (limestone) to form what many people today (mostly real estate agents and others prone to chronic exaggeration) call mountains. In actuality, these are more similar to the foothills of the Rockies or the Appalachians than to those mountains themselves, and are occasionally broken by stretches where the plateau remains essentially intact. Elevations ranges seldom exceed two or three hundred feet from valley to hilltop.
It should be apparent then, to those familiar with the forces of gravity, that the soils in the valleys and on the un-eroded plateau regions will tend to be richer and deeper than on ridge-tops and hillsides, which will be thinner and more rocky. This is not to suggest that hill lands are not workable. If all you need is space for a garden, then consider that you'll be getting lots of native building materials in the deal, and probably paying somewhat less per acre for hillier land. If, on the other hand, you want to start a truck farm, or raise something larger than a half acre garden, We'd suggest you email us to discuss an ideal location for your situation.