Plant concentrations of essential elements may exceed or fall from the critical concentration which is the minimum concentrations required for growth. Macro nutrients are those elements that are needed by plants in larger amounts than critical concentration.
Example of Macronutrients: N, K, Ca, Mg, P, and S
They are required for Micronutrients are opposite of macronutrients. Micronutrients are those which are required in small quantities than critical concentration to ensure normal growth and reproduction of a plant.
Example of micronutrients: Cl, Fe, B, Mn, Zn, Cu, Mo, and Ni
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