The 'Pops' (hollow pod) disorder in groundnut is primarily caused due to the deficiency of which nutrient?

Prolonged phosphorus deficiency in crop plants usually results in which of the following symptoms?

Deficiency of boron in plants often causes which symptom in growing tips and root apical meristems?

Stunted growth, small leaves ('little leaf'), and rosetting are characteristic symptoms of which micronutrient deficiency?