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How can I connect the N-Tester 1995 and N-Tester Display to the Atfarm app and measure with it?

  • Updated

Even though our N-Tester 1995 and N-Tester Display cannot connect via Bluetooth® wireless technology to the Atfarm mobile app like the N-Tester BT, you can use them in combination with the Atfarm mobile app without any restrictions.

N-Tester Display

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N-Tester 1995

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Once you have installed our Atfarm mobile app on your mobile device and added your farms and fields to your Atfarm account, you can start analysing your crops with the N-Tester.

 

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What is required to use the N-Tester

 

 

Follow these steps to connect your N-Tester and measure with it:

 

 

Step 1 | Install the app

 

If you have not already, download and install our free Atfarm mobile app from Google Play Store or Apple App Store on your mobile device. Scan the QR-Code below with your camera and follow the link, or search for Atfarm in the app store.

 

Install from Google Play Store:

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Install from Apple App Store:

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Step 2 | Prepare the analysis in the app

 

  1. Open the Atfarm mobile app and log in to your Atfarm account with email and password.
  2. Create or select your farm.
  3. Create or select your field.
  4. The field page opens. Scroll down to the N-Tester options and select START MEASUREMENT.
  5. Appears only the first time: Select your N-Tester model. You can manage your devices later in the settings page.
  6. Fill out the crop data sheet. The inputs vary based on country and region. Our nitrogen recommendations are only valid for certain crops and development stages. The app provides you this information in the crop datasheet.
  7. Click START MEASURING and allow the app to track your GPS position.

 

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Why we ask for your location

 

 

Step 3 | Measure your crops

 

After you successfully prepared the analysis in the app, you are ready to measure your plants.

 

  1. Turn on your N-Tester and set it up for the measurement.
  2. Take at least 30 measurements of your plants in the field.
  3. When finished, switch off the N-Tester.

 

Please use our N-Tester Display user manual/N-Tester 1995 user manual to learn how to set up your device and measure with it.

 

Here are some tips to receive best measurement results:

 

  • To obtain a representative average reading, the measurements must be carried out randomly distributed across the field, on at least 30 representative plants.
  • To get the best results, move through the field making a W pattern.
  • Avoid atypical field areas, for example, areas with distinctly different soil properties, such as sand banks or similar.

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  • Depending on your country and crop, the type of leaf recommended for measuring changes. Choose a plant in the right growth stage, for example, BBCH 30 - 51.

 

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  • Measure in the middle of the leaf blade of the youngest fully developed leaf. Measurements on not fully developed leaves may lead to increased recommendations.

  • Try to shade the leaf for the measurement.

  • Avoid grained or thick points of the leaf, leaves with visible drought stress or leaves rolled together.

  • Make sure that the field has enough sulphur. A sulphur deficiency such as nitrogen deficiency leads to the leaves being brighter and the nitrogen recommendation provided might not be correct. Other nutrients do not have any significant influence.
  • Differences in the varieties will be considered in the app by using correction factors.

 

 

Step 4 | Get the nitrogen recommendation

 

  1. When you completed your measurements, fill in the 3-digit N-Tester value shown on your device into the app.
  2. Click on GET N-TESTER VALUE in the app.
  3. A nitrogen recommendation will be displayed on your screen.
  4. Click REPEAT MEASUREMENT to re-start your measurement.
  5. Click on SHOW MORE INSIGHTS to see more details about your crop.
  6. Click on SHOW N-TESTER VALUES to see the 3-digit values. These values are an intermediate result determined by the N-Tester.

 

You can find all nitrogen recommendations in the field page.

 

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For now, we do not take fertiliser regulations into account for the N-Tester analysis. Please remember to take the maximum nitrogen requirement according to the governmental fertiliser restriction when fertilising your crops.

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