Since only a very few soils in Missouri possess all these characteristics, soil modifications are usually necessary. Highbush blueberries planted in an unfavorable site usually perform poorly, regardless of other cultural or management practices employed. You'll notice that these plants are planted on a raised ridge or a berm. Missouri soils tend to have textural and structural characteristics that can lead to drainage problems. Blueberries will not tolerate poorly drained soils, and a berm helps ensure good water drainage.
Water drains away from the berm, and the blueberries thrive in the added amount of topsoil.
The final thing you need to think about in preparing a site for blueberries is that the soil be acid. If your natural soil pH is 6.5 or higher, you should consider crops other than blueberries. So the first step in planting blueberries is having the site ready to go.