A major problem in the production of tobacco on acid soils in Kentucky is manganese toxicity, despite the fact that it can be easily prevented. Since manganese toxicity is caused by high levels of soil acidity, prevention of soil acidity by liming is the best method of control. And soil testing is the only way to determine how acid a field has become.
Wallace, A. M.; Wells, Kenneth L.; Sims, J. L.; and Gray, Paul, "Field Tests of Some Liming Treatments for Growing Burley Tobacco on Acid Soils" (1977). Agronomy Notes. 114.