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Deficiency of which mineral causes dark green coloration of the leaves?

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Deficiency of which mineral causes dark green coloration of the leaves?

(a) Phosphorus

(b) Potassium

(c) Nitrogen

(d) Calcium

The question was asked in semester exam.

Origin of the question is Mineral Nutrition topic in division Plant Physiology of Life Sciences

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Best answer
The correct option is (a) Phosphorus

To elaborate: Phosphorus deficiency in plants can lead to the formation of dead tissues in the leaves which is called necrotic spots and causes dark green color of leaves.

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