Which of the following is not a primary nutrient for plants?
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Correct Answer: Option D
Explanation:
Iron is a micronutrient, essential in small amounts for plant growth. The primary nutrients, or macronutrients, that plants require in larger amounts are nitrogen, phosphorus, and potassium.
Iron is a micronutrient, essential in small amounts for plant growth. The primary nutrients, or macronutrients, that plants require in larger amounts are nitrogen, phosphorus, and potassium.