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Which of the following is a micronutrient required for plant growth?
Zinc
Nitrogen
Potassium
Phosphorus
Zinc
Zinc is classified as an essential plant micronutrient, or trace element, which is required in small quantities for vital enzymatic and metabolic functions. In contrast, nitrogen, potassium, and phosphorus are primary macronutrients consumed in large quantities by plants for structural growth and development.
Zinc is classified as an essential plant micronutrient, or trace element, which is required in small quantities for vital enzymatic and metabolic functions. In contrast, nitrogen, potassium, and phosphorus are primary macronutrients consumed in large quantities by plants for structural growth and development.
Plant nutrients are categorized based on plant quantitative requirements into macronutrients (primary like N, P, K and secondary like Ca, Mg, S) and micronutrients (trace elements like Zn, Fe, Cu, Mn, B, Mo, Cl, Ni).
Micronutrients are essential elements required by plants in very small quantities, typically less than 1 mg per kg of dry matter.
Zinc is critical for auxin synthesis, internode elongation, and the activation of various plant enzymes.
Nitrogen, phosphorus, and potassium are categorized as primary macronutrients because plants absorb them in large amounts.
Option B (Nitrogen) is a primary macronutrient vital for vegetative growth, chlorophyll production, and protein synthesis.
Option C (Potassium) is a primary macronutrient that regulates ionic balance, stomatal opening, and water status within plant tissues.
Option D (Phosphorus) is a primary macronutrient critical for energy transfer via ATP, photosynthesis, and nucleic acid formation.
A is correct тАФ Zinc is an essential plant micronutrient required in trace amounts for enzymatic activation and growth.
Questions distinguishing between macro and micronutrients frequently appear in competitive agricultural and general science exams like RRB JE. Memorize the complete list of eight micronutrients to quickly spot correct options.
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