Increasing Grain Maize Yield

Along with the major macronutrients influencing grain number and size, grain maize yield is dependent on all the other nutrients, the unavailability of which would restrict the growth process of the plant.

Crop Nutrition and Maize Grain Yield

Magnesium

Sulphur and Nitrogen

Copper

Maize plants are sensitive to copper deficiency and peak demand is during the generative growth stage. Plants require relatively low levels of copper compared to other micronutrients and little is removed in the harvested crop.

Iron

Maize plants are only slightly sensitive to lack of iron. Where deficiencies do occur, foliar applications – particularly those made at later stages of leaf growth and at early stem extension – have been shown to increase maize yield.

Manganese

Manganese has a direct effect on plant development and growth. It is involved in chlorophyll production and photosynthesis, and acts as a catalyst in many plant growth processes including the metabolism and synthesis of proteins. Most manganese accumulates in the leaves and stems – more so than any other micronutrient. Uptake is gradual particularly during vegetative growth. Foliar or soil applications can be used to increase grain maize yield.