Deficiency symptoms of nitrogen and potassium are visible first in :

Senescent leaves

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Young leaves

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Roots

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Buds

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Solution

The correct option is A Senescent leaves
Nitrogen and potassium are macronutrients required by plants for their growth. In the older leaves, biomolecules containing these elements are broken down and are transported to younger leaves. Hence, deficiency symptoms of nitrogen and potassium are visible first in older (scenescent) leaves.

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Deficiency of _______ in plants causes symptoms similar to deficiency of nitrogen. It also is a component of thiamine, biotin and CoA.

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