Maximise your returnon nitrogen applications
How much nitrogen should you apply to your cereals? Find out with the free N-Tester BT.
Easy and affordable
Maximise return on N applied and improve yield quality with field specific N-rate recommendations based on the real N-uptake of your cereals.
The N-Tester BT has been field tested across hundreds of trials and developed by Yara Research & Development for over 25 years.
How does the N-Tester BT work?
The N-Tester BT
The device uses an LED and light sensor to instantly measure the chlorophyll content of a crop when you clamp it onto the newest fully developed leaf of a crop. This green level shows the N content of the plant.
These N-Tester values are automatically sent to your mobile device via Bluetooth™ connection. No internet or cellular signal is needed to record or take measurements.
The Atfarm App
Atfarm uses an algorithm powered by Yara agronomists to calculate the current N balance of your field based on the N-uptake measurements from the N-Tester BT. Decades of field trials by Yara ensure these calculations are accurate.
All you have to do is enter information about your field: crop type, variety, growth stage, target yield estimate, Soil N supply, N already applied.
After measuring your crops, you get an N recommendation that shows you the exact N needs of your crops.
Your precision N-rate recommendation
Open the Atfarm app and easily find the N-rate recommendation for your crops (shown in kilos of nitrogen per hectare).
The N-rate recommendations from the N-Tester BT are designed to help fine-tune N-applications during the growing season and help you maximise the yield return for every kilo of N you apply.
Calibrated for most cereals
N-Tester BT is currently individually calibrated for most cereals:
When to use the N-Tester BT?
Get N-Rate recommendations based on the N-uptake of your cereals for the 2nd, 3rd and protein dressings.
Flag leaf development
Optimise N use on your fields in 5 steps
Connect your N-Tester BT to your mobile device using Atfarm app
Calibrate your N-Tester BT
Measure 30 crops across 1 field
See your N-rate recommenda-tions in the Atfarm app
“Monitoring the crops through the season, with the N-Tester, will give accurate recommendations based on what the nitrogen levels are in the crop.
With more accurate rates for each field, the use efficiency will increase, meaning you’re getting the most out of the nitrogen that you are applying.”
Agronomy Operations Manager,
Specialist in Crop Nutrition and Digital Tools.