Death of leaf tissues in plants is caused by the deficiency of:

Explain the deficiency symptoms of essential elements in plants.

Deficiency symptoms of mineral elements appear first in young leaves. - $P$
Deficiency symptoms of mineral elements appear first in senescent (older) leaves. - $Q$
$P$ and $Q$ are respectively:

Premature leaf fall is due to deficiency of

Deficiency of which mineral element causes the dormancy of lateral buds?

Rapid deterioration of root and shoot tip occurs due to the deficiency of