What nutrient in fertilizers is represented by the letter 'K'?

The letter 'K' in fertilizers represents potassium, which is an essential macronutrient for plants. Potassium plays a critical role in various physiological processes, including water regulation, enzyme activation, and photosynthesis. It helps strengthen plants' overall health and resistance to diseases, enabling them to thrive even under stress conditions such as drought or extreme temperatures.

Potassium is involved in the movement of nutrients and water within the plant, contributing to stronger root systems and more efficient nutrient uptake. This nutrient is often measured in fertilizer formulations to ensure that plants receive an adequate supply, as it can significantly influence growth and yield. Understanding the function of potassium in plant nutrition is vital for effective fertilization practices.