Standard NPK Stoichiometry for Irrigated Wheat
For high-yielding semi-dwarf wheat varieties (HD 2967, HD 3086, DBW 187, DBW 222), the standard recommended fertilizer dose is 120-150 kg N, 60 kg P2O5, and 40 kg K2O per hectare.
| Growth Stage | Days After Sowing (DAS) | Fertilizers to Apply per Acre | Agronomic Purpose |
|---|---|---|---|
| Basal Dose at Sowing | At Sowing (Day 0) | 1 bag DAP (50kg) + 25kg MOP + 25kg Urea | Early root establishment & tillering |
| First Top Dressing (CRI) | 21 - 25 DAS | 1 bag Urea (45kg) + 10kg Zinc Sulphate (21%) | Rapid tillering & secondary root induction |
| Second Top Dressing (Jointing) | 45 - 55 DAS | 1 bag Urea (45kg) | Spikelet differentiation & leaf elongation |
| Heading Stage (Foliar) | 75 - 85 DAS | Foliar spray of 0:0:50 @ 1.5 kg/acre + 0.1% Boron | Grain filling, test weight & drought buffering |
State-Specific Tips for Punjab, Haryana, UP & Bihar
Punjab & Haryana: Soils with excessive tubewell irrigation show severe Manganese (Mn) deficiency. Apply foliar spray of 0.5% Manganese Sulphate 2 days before first irrigation.
Eastern UP & Bihar: Heavy alluvial soils show delayed zinc response; apply Zinc Sulphate (33% monohydrate) @ 5 kg/acre as basal dose.
Agronomy Facts by R. S. Meena MCQ Test Series
Strictly based on the standard reference book "AGRONOMY FACTS" by R. S. Meena, covering agrometeorology, crop production, and soil fertility.
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