Plant essential nutrients are classified based on the quantities required by the plant. Macronutrients are needed in relatively large amounts (grams per kg of dry matter). They include Carbon (C), Hydrogen (H), Oxygen (O), Nitrogen (N), Phosphorus (P), Potassium (K), Calcium (Ca), Magnesium (Mg), and Sulfur (S). Micronutrients (or trace elements) are needed in much smaller amounts (milligrams per kg of dry matter). They include Iron (Fe), Manganese (Mn), Copper (Cu), Zinc (Zn), Boron (B), Molybdenum (Mo), Chlorine (Cl), and sometimes Nickel (Ni). From the options provided: A) Oxygen: Macronutrient (from air/water). B) Hydrogen: Macronutrient (from water). C) Nitrogen: Macronutrient. D) Zinc: Micronutrient.
Choose the micronutrient needed for plant growth
Asked in TNPSC CS Prelims 2017 · Topic: Plant Nutrition (Micronutrients: Role, uptake, and deficiency symptoms)
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