If a crop or variety isn't available in the Atfarm mobile app for the N-Tester analysis, it means that we haven't collected enough field trial data for a calibration for your region yet. Please stay tuned as we're constantly adding more crop and variety calibrations.

Unfortunately, if you can't find a specific crop or variety, you won't be able to use a calibration from a similar crop or variety instead. Each crop and variety require a specific calibration to ensure the quality of the final nitrogen recommendation.

N-Tester Display

When measuring with the N-Tester Display model, you're used to entering the crop type and variety directly into the device. However, as you select the crop and variety directly in the Atfarm mobile app, crop and variety data is no longer required and maintained on the N-Tester Display. For crop type and variety, simply enter any crop type and variety or select Other.

The Atfarm mobile app uses an algorithm to calculate a nitrogen recommendation for each crop type and variety. In addition to the variety correction values, other important parameters are included in the algorithm. This means that if you can't find the desired crop/variety in your device, it's not a problem.