Ujwala Ranade-Malvi
Institute for Micronutrient Technology, India

Potassium is an essential element for plant growth and is an extremely dynamic ion in plant and soil system. As an ion, potassium is highly mobile in the plant system but only moderately mobile in the soil system. Just like humans require a balanced diet with appropriate amounts of carbohydrates, proteins, vitamins, minerals, fats and water, plants too require conditions of balanced nutrition. There is a pre-determined ratio of nutrients that is required by the plant system, depending on its life cycle, environment and its genotypic characteristics, to realize its maximum genetic potential.

This ratio of elements is more critical than the actual concentration of the individual elements. Nutrient balancing in micronutrients is an important and yet more difficult than balancing between macronutrients. Synergistic and Antagonistic relationships between nutrients are responsible for efficient/inefficient uptake and utilization of potassium. This paper discusses the interrelationships between plant nutrients with
a special reference to potassium and macronutrients like nitrogen and phosphorus, potassium and secondary nutrients like calcium, magnesium and sodium and finally potassium and micronutrients. The goal of this paper is to elucidate the complicated and still less understood relationships between essential nutrients so as to bridge the gap between potential yields and actual yields.

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