Too little nitrogen causes which visible symptom?

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Multiple Choice

Too little nitrogen causes which visible symptom?

Explanation:
Nitrogen deficiency reduces chlorophyll production, so leaves turn yellow as the green pigment fades. Nitrogen is highly mobile in the plant, so the symptoms show up first on older leaves and may move to newer growth if the shortage continues. This lack also limits amino acid and protein synthesis, leading to poorer growth and canopy vigor. Therefore, the visible symptom is yellowing of the leaves. Dark green leaves would suggest adequate or excessive nitrogen, leaf curling isn’t the typical sign of nitrogen shortage, and no change would mean nitrogen isn’t limiting.

Nitrogen deficiency reduces chlorophyll production, so leaves turn yellow as the green pigment fades. Nitrogen is highly mobile in the plant, so the symptoms show up first on older leaves and may move to newer growth if the shortage continues. This lack also limits amino acid and protein synthesis, leading to poorer growth and canopy vigor. Therefore, the visible symptom is yellowing of the leaves. Dark green leaves would suggest adequate or excessive nitrogen, leaf curling isn’t the typical sign of nitrogen shortage, and no change would mean nitrogen isn’t limiting.

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