Potassium is one of the most important nutrients essential for all crops and is present in large quantities in the plant. It plays a major role in achieving the maximum economic yield, as part of a balanced approach to crop nutrition, as well as influencing crop quality. It is associated with the movement of water, nutrients, and carbohydrates in plant tissue. The total K content of soils frequently exceeds 20,000 ppm (parts per million). Potassium is mobile in plants, and will move from lower to upper leaves. Potassium deficiency can cause substantial growth reduction before specific symptoms develop. Plants improve their flowering or yield potential by the use of high-potassium soils. Farmers can increase productivity by applying the desired amount of potassium fertilizer at the time of flowering.