POTASSIUM DEFICIENCY occurs when soil is lacking potassium. Even when sufficient potassium is present, if the soil contains high levels of lime and magnesium, the plant still suffers from potassium deficiency because these elements suppress potassium absorption. Potassium deficiency can also easily occur in sandy soil, which has less humus, because potassium is readily leached from sandy soil, as with nitrogen.   Using a soil foundation with Indigenous Micro-Organisms (IMO)