The macronutrients are the elements which are

The macronutrients are the elements that are required by plants in large quantities.
Macronutrients, or macros, are essential nutrients the body needs in large quantities to remain healthy.
The primary macronutrients are Nitrogen (N), Phosphorus (P) and Potassium (K). Nitrogen is essential for plant development since it plays a fundamental role in energy metabolism and protein synthesis. Nitrogen is absorbed by the plant in the form of nitrate.