N-Calculate - spring barley nitrogen response | Yara Ireland

Fertiliser calculators

A useful collection of calculators to compare the return on investment and margin over fertiliser when using different fertilisers.

Nitrate vs Urea NS vs Straight N Compound vs Blend CN vs CAN Wheat N Response Value of Grass Urea Blended Fertiliser

Nitrogen response on spring barley

The optimum rate of nitrogen for spring barley depends on the response of the crop to nitrogen, the crop value and the cost of nitrogen. This calculator uses nitrogen response data to calculate the optimum rate of nitrogen at different wheat and nitrogen prices and also calculates the margin over fertiliser cost and return on investment for different applied rates of nitrogen.

The calculations of predicted yield and optimum nitrogen rate are based on actual n-response data derived from 10 years (2011-2021) of n-response trials using ammonium nitrate as the n source, as shown below.

It is possible to use the calculator for other sources of nitrogen such as CAN or liquid fertiliser but if using urea be aware that the nitrogen use efficiency may be reduced resulting in lower than predicted yields (of around 3-5%) which will affect the results.

Recommended fertilisers

The following YaraBela nitrate-based fertilisers are recommended

27% N + 9% SO3 - Granular uniform compound nitrate based nitrogen and sulphur fertiliser for use on all crops.

27% N - Granular calcium ammonium nitrate based nitrogen fertiliser for use on any crop.

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