Final answer:
The two essential macronutrients are Nitrogen and Calcium, while the two essential micronutrients are Iron and Zinc.
Step-by-step explanation:
The two essential macronutrients are Nitrogen and Calcium. Macronutrients are nutrients that plants require in larger amounts. The two essential micronutrients are Iron and Zinc. Micronutrients are nutrients that plants require in smaller quantities.