Producers may choose to use conventional soil-applied products early in the spring and then switch to foliar applications later, or take the foliar option throughout. “You want to apply at the start of spring growth, and it’s best to apply little and often – typically whenever you’re applying fungicide or herbicides as a tank-mix to minimise the number of field passes and save on fuel,” says Mr Chaplin.
It’s important to choose a product which won’t scorch the crop though – for example Multi-N has a non-scorching formulation and can be applied in a low dilution, reducing the volume of water required per tank. “It can go on at 100 litres of water per hectare, at a rate of 5-90 litres/ha of product, depending on the nitrogen requirement.”
Foliar nitrogen has proved to improve crop efficiencies.