allerySymptoms of MOBILE mineral deficiency (e.g., N, P, K) first appear in:
AYounger growing leaves at top (or shoot tip)
BOlder leaves at the bottom of the plant
CAll leaves simultaneously across plant
DRoot cells only initially below ground
Answer & Solution
Correct answer: B. Older leaves at the bottom of the plant
MOBILE elements (N, P, K, Mg, S) are remobilised from older leaves to younger growing parts.
So deficiency first appears in OLDER leaves.
IMMOBILE elements (Ca, Fe) cause symptoms in YOUNGER leaves first.
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