Role of potassium in plant growth.

Potassium is a very important plant nutrient. There are many important sources of potassium present in the soil. The availability of potassium for plant absorption is highly variable and depends on the soil structure, dynamics and interaction of root with soil particles. The presence, absence, deficiency and excess availability of potassium can all affect plant growth in different ways. Potassium plays a very vital role in many plant physiological processes. Many scientists considered potassium second to nitrogen because of its importance in plant growth. Potassium deficiency affects plant growth and normal functions. [ABSTRACT FROM AUTHOR]