N-Calculate - wheat nitrogen response calculator | 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 wheat

The optimum rate of nitrogen for wheat 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 15 years (2005-2021) 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.

Check out the latest agronomy advice

These articles will help you get even better results from your fertilisers by keeping you up to date with the latest agronomy advice from the Yara agronomists. If you don't find the advice you are looking for try looking in our full advice archive.

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Fertiliser quality - don't settle for less

Soil fertility is certainly top of both farmers and policy makers minds currently, with a broad consensus that it plays a key role in the continued economic and environmental sustainability of farms.

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Keeping clover in fine fettle

White clover is being increasingly used on intensively grazed farms where the benefits can be substantial, lowering both the cost of growing grass and the carbon emissions intensity of milk produced. Managing nutrient and fertiliser inputs is a key component in establishing and maintaining clover in these swards successfully.

Sulphur: Best Practice

It is widely accepted that UK soils are deficient in sulphur so supplementation via organic manures or mineral fertilisers is essential. What I think is less understood is that not all sulphur-containing fertilisers are the same.

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Improve Potato Quality with Calcium

Did you know that up to 50% of wheat leaf samples show a deficiency in zinc, magnesium, copper and manganese?

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Grassland Grazing Tips for May to June

We’re heading into a busy period for grassland farmers and as ever, the weather can change everything in a heartbeat. Here are a few things to focus on throughout the rest of May and heading into June.

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Stimulating Growth by Enhancing Nature

Yara’s expertise isn’t solely focussed on NPKS fertiliser development, over the years Yara have worked hard to reduce our impact on the environment as well as developing more sustainable products.

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Walk your Fields

Throughout April and into May we’ll be focusing on optimising grass growth to meet the demands of our grazing cows so that we can maximise grazed grass in the diet.

Help Late-Drilled Wheat Crops Catch Up

Did you know that up to 50% of wheat leaf samples show a deficiency in zinc,magnesium, copper and manganese?

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Maximising your vegetable crops’ potential with foliar nutrition

With the amount of rainfall we've had, a lot of the nutrients in the soil will potentially have leached away.

Looking for something else ? Check our full advice archive