Role: Nitrogen metabolism, enzyme activation.

Deficiency: Yellowing, premature leaf fall, poor fruit set.

Management: Foliar spray of Ammonium Molybdate (0.01–0.05%).

(g) Magnesium (Mg) – Secondary nutrient (often included)

Role: Part of chlorophyll molecule, enhances photosynthesis.

Deficiency: Interveinal chlorosis in older leaves, weak plants.

Management: Soil application of Magnesium Sulphate (20–25 kg/acre).

3. Methods of Micronutrient Application

1. Soil Application – Apply Zn, B, Fe, Mn fertilizers in soil during planting/growth.

2. Foliar Sprays – Quick correction, applied at flowering & fruit development stages.