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(D) Plants require $17$ essential elements for their growth and development.These are classified into macronutrients and micronutrients based on their

Vedclass · Accepted Answer

Magnesium

Vedclass · Answer

(D) Plants require $17$ essential elements for their growth and development.These are classified into macronutrients and micronutrients based on their quantitative requirements.Macronutrients are present in plant tissues in large amounts (in excess of $10 	ext{ mmol kg}^{-1}$ of dry matter).These include Carbon, Hydrogen, Oxygen, Nitrogen, Phosphorus, Sulphur, Potassium, Calcium, and Magnesium.Manganese, Zinc, and Iron are classified as micronutrients because they are required in very small amounts.Therefore, Magnesium is a macronutrient.

$A$ macronutrient is

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