Micronutrients are those that the body needs in smaller amounts, whereas macronutrients are those that the body needs in larger amounts.
Every plant needs a little amount of chlorine, which is an essential micronutrient.
Chlorine plays an important role in several physiological metabolism processes in plants, including nutrient transport, stomatal control, the activation of various enzyme systems, etc.
It is necessary for the splitting of water during photosynthesis.