What characteristic deficiency symptom appears in maize plants grown in agricultural soil severely lacking available nitrogen?
Answer and explanation
Correct answer: A. generalized chlorosis beginning on older lower foliage
- Step 1: Nitrogen is a mobile essential macronutrient required for chlorophyll and protein synthesis. Step 2. When deficient, plants translocate nitrogen from older mature leaves to new growth, causing older lower leaves to turn pale yellow (chlorosis). Answer: generalized chlorosis (yellowing) beginning on older lower foliage. Why not the others: Purple pigmentation indicates phosphorus deficiency; marginal necrosis indicates potassium deficiency.
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