Which of the following is considered a micronutrient?

Zinc is classified as a micronutrient because it is required by plants in relatively small amounts compared to macronutrients like nitrogen, phosphorus, and potassium. Micronutrients are essential for various physiological functions within the plant, including enzyme function, protein synthesis, and overall growth and development. Zinc plays a crucial role in the synthesis of chlorophyll, is involved in various biochemical processes, and contributes to the health of the plant.

In contrast, calcium and magnesium are categorized as macronutrients because they are needed in larger quantities by plants to support structural functions and metabolic processes. Phosphorus is also a macronutrient, important for energy transfer and photosynthesis. Understanding these classifications helps in nutrient management practices, ensuring plants receive the appropriate nutrients for optimal growth.