Wheat is the world's most widely grown cereal crop, cultivated on over 220 million hectares globally. Proper fertilization is the single most important management practice for achieving high grain yields and quality. This guide covers the complete fertilizer strategy for wheat production.
Wheat Nutrient Requirements
A wheat crop yielding 5 tons/ha of grain removes approximately:
- Nitrogen (N): 120-180 kg/ha
- Phosphorus (P2O5): 50-80 kg/ha
- Potassium (K2O): 80-120 kg/ha
- Sulphur (S): 10-20 kg/ha
- Zinc (Zn): 0.3-0.5 kg/ha
Nitrogen: The Yield and Protein Driver
Nitrogen is the most yield-limiting nutrient in wheat and directly affects both grain yield and protein content. Apply Urea 46-0-0 in 2-3 split applications:
- At planting (basal): 20-30% of total N
- Tillering stage (25-30 days): 40-50% of total N — the most critical application
- Stem elongation/booting (50-60 days): Remaining 20-30% of total N
The tillering application is the most important because it determines the number of productive tillers (heads) per square meter, which is the primary yield component.
Phosphorus: Root and Tillering
Phosphorus is critical for early root development and tiller formation. Apply DAP 18-46-0 or MAP 12-61-0 at 100-200 kg/ha as basal dressing. All phosphorus should be applied at planting because it moves very slowly in soil.
Potassium: Grain Filling and Disease Resistance
Potassium supports grain filling, stalk strength (preventing lodging), and disease resistance. Apply MOP 0-0-60 at 80-150 kg/ha, split between basal application and tillering stage.
Recommended Wheat Fertilizer Programs
Standard Program (4-5 ton yield target)
- Basal (at planting): 150 kg/ha DAP + 80 kg/ha MOP + 50 kg/ha Urea
- Tillering (25-30 days): 150 kg/ha Urea
- Booting (50-60 days): 100 kg/ha Urea
High-Yield Program (6+ ton target)
- Basal: 200 kg/ha NPK 15-15-15 + 100 kg/ha MOP
- Tillering: 200 kg/ha Urea + 100 kg/ha NPK 17-17-17
- Booting: 100 kg/ha Urea
Micronutrients for Wheat
Wheat is particularly sensitive to zinc deficiency, which is widespread in alkaline and calcareous soils. Apply zinc sulphate at 25 kg/ha as basal dressing in known deficient areas. Zinc deficiency causes stunted growth, narrow leaves, and reduced tillering.
Common Fertilizer Mistakes in Wheat
- Applying all nitrogen at planting — leads to excessive early growth and reduced tillering response
- Skipping the tillering application — the most yield-limiting mistake in wheat management
- Ignoring sulphur — increasingly deficient in many soils, sulphur improves protein content
- Not testing soil — leads to over- or under-application of nutrients
Bulk Fertilizer Supply for Wheat
Thai Fertilizer supplies all wheat fertilization products in bulk from Thailand. Contact us for quotations on Urea, DAP, MOP, NPK blends, and micronutrients in 50kg bags or bulk quantities.