YaraIrix - Turn your smartphone into a nitrogen sensor

YaraIrix is a tool that allows you to measure the nitrogen demands of multiple crops at a variety of growth stages.

Combining the accessibility of smartphone technology with Yara's deep agronomical knowledge, YaraIrix puts a powerful crop analyser in your hands.To use it, download the YaraIrix app (iOS and Android) and begin taking photos of your crops

The app analyses the images and calculates precise N fertiliser recommendations for oilseed rape based on, geolocation and growth stage and for cereals will give an estimate of crop nitrogen uptake.  Selecting one of two hardware options to use with the app opens up a greater variety of crops and growth stages for measurement.

What does YaraIrix do? 

YaraIrix's core function is the measurement of chlorophyll content and, thereby, the nitrogen needs of a crop. YaraIrix is a tool that works with two additional hardware options – N-Tester Clip and N-Tester BT – that open up precision farming technology to both large and small-scale farmers for the very first time.

What crops does YaraIrix work in?

YaraIrix can currently be used in oilseed rape, winter wheat and winter barley.  

Oilseed Rape

When used in oilseed rape YaraIrix will determine the crop biomass and nitrogen uptake and based on this will give a nitrogen recommendation.

Yara’s nitrogen trials have shown the strong relationship in oilseed rape between canopy size in early spring and the optimum rate of nitrogen required. As the canopy of oilseed crops can vary greatly between different fields due to differences in drilling date, soil types, topography and slug pressure, amongst others, the optimum rates can vary greatly also. To take a canopy fresh weight measurement to assess nitrogen uptake in each field can be very time consuming, and an average across all fields may not show the true variance within. 

The YaraIrix app helps to speed up measurements by quickly providing a value for nitrogen uptake in the crop and a recommendation of the rate to apply, based on a minimum of four images per field. Eight years of data capture over very different seasons has led to over 12,000 crop images, each with a corresponding laboratory analysis result. This has enabled a wide range of different nitrogen rates, seed rates, drilling dates and measurement dates to be analysed to create a robust tool and provide confidence in the result. 


YaraIrix can also be used in winter wheat and winter barley too.

When used in winter wheat or winter barley prior to stem extension ImageIT will determine the crop nitrogen uptake but not give a recommendation, however the crop nitrogen uptake can then be used in conjunction with other measurements to fine tune nitrogen recommendations and can be used as an aid to crop management. 

Further work is on-going to extend this functionality on cereals and to add other crops.

Which version of YaraIrix is right for me?

The basic version is a free smartphone app for analysing winter wheat, oilseed rape, maize and barley during early growth stages (availability of crops varies by country). Once the app takes a measurement, it provides an instant N recommendation. It calculates these using algorithms that are based on more than 20 years of field studies. 

The first hardware option is the N-Tester Clip. This is an add-on that clips over a smartphone's camera to enable precise N recommendations. The second hardware option is the N-Tester BT, which provides recommendations for the second to fourth dressings of a range of crops. It communicates with the YaraIrix app using Bluetooth and also saves historical data to enable further optimisations. 

YaraIrix and N-sensor

How do I get YaraIrix?

Download the free app for iOS and Android and then sign in to begin analysing your crops. After taking a photo, you’ll receive an instant N fertiliser recommendation that you can use to plan your first dressing. YaraIrix is suitable for winter wheat, oilseed rape, maize, barley during early their growth stages.

If you’d like to expand to include winter and spring barley, winter rye and winter triticale, plus the aforementioned crops and all from the second to fourth dressings, you should opt for the N-Tester Clip or N-Tester BT.


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