What Nutrients are Required for Maize Yield and Quality?

April 2026

Early nutrient availability is critical to maize performance, particularly in cool spring conditions. Getting nitrogen, phosphate and potash balance right at establishment sets the yield ceiling and protects crop quality.

Maize is one of the most responsive crops to good nutrition, with early nutrient supply playing a decisive role in final yield and quality. While daytime temperatures are rising, cooler night temperatures are still holding back soil warmth. Under these conditions, early root development is slow, and any nutrient shortage at establishment can permanently restrict yield potential.

Nitrogen is the primary driver of maize yield and feed quality, but balance is essential. Insufficient nitrogen limits leaf area, photosynthesis and starch production, while excessive nitrogen can delay maturity, increase lodging risk and reduce cob proportion.

Phosphate is particularly important during the early growth stages, supporting rapid root development and nutrient uptake. Even where soil phosphate indices are adequate, a placed starter fertiliser close to the seed often delivers a significant early growth advantage.

Maize also has an exceptionally high demand for potassium. Adequate soil potash is vital for cob fill, water regulation and stress tolerance. A 40 t/ha crop removes around 175 kg/ha of K₂O, yet total uptake by early August can reach 360 kg/ha, with peak demand at approximately 8 kg/ha K₂O per day during rapid growth. Soils must be able to supply both the total and daily requirement without restriction. At peak growth, the maize plant often contains more potassium than nitrogen.

Organic manures can contribute substantial nutrients, but availability is variable. Regular soil and manure analysis is essential to optimise fertiliser plans, protect soil health and remain compliant..

What are the key nutritional principles for maize?

• Early nutrition sets the yield ceiling
• Nitrogen drives yield – but balance is critical
• Phosphate is essential in the early stages
• Potash demand is exceptionally high
• Soil structure and nutrient availability matter as much as application rate
• Organic manures are valuable, but must be managed carefully
• Sulphur improves nitrogen efficiency
• Magnesium and trace elements support overall crop function

For more information see PDA Leaflet 17 Maize fertiliser requirements.