Instant Measurement of Dark Green Colour Index (DGCI) in Crops

That transforms your research or field experiment into breakthrough knowledge. Without having to rely on an expensive equipment.

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7 Years in Business • 11 300 Users • 2 200 Hours of Engagement • 3 000 In-Field Sessions • 6 500 Measurements • 23 Mentions in Published Papers
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Not sure if Petiole Pro is right for your research? Ask us anything at our weekly AMA style webinar.

Talk to the team live, and evaluate if Petiole Pro is right for your research. Join Maryna Kuzmenko from Petiole Pro while she talks through Petiole's plant data collection solution providing the answers you need to make your decision.

What's A Petiole...?
What exactly is the difference between SPAD for chlorophyll content measurement and Petiole Pro?
Petiole Pro is a mobile application and chlorophyll content meter in a smartphone for scientist and farmers
Yes, Petiole Pro was created so that smart people like you, who don't have expensive equipment, can easily check the Nitrogen status of crops using only camera on a smartphone and a colour calibration pad, to get more data for your experiment! Let us show you how it works:
1️⃣ Install the app and take your smartphone with you to the field or lab. Yes, the app works without internet connection!
2️⃣ Put your colour calibration pad in front of the camera. Place a leaf on the pad or next to it but keeping markers on the pad visible for the camera.
3️⃣ Record measurements or save them right in the app. You can also share any of your measurements.
Watch Demo:
In less than 10 minutes, you can measure what would have taken you hours to do...

"We used #petiole in today's land measurements. It has given us great convenience. It provided ease of measurement in the field instead of removing the plants from the soil and carrying them to the laboratory. Many thanks to the team that made the #petiole application."

— Ahmet SAY, Erciyes University Research Assistant

Here are a few other FAQs we get a lot:

What is colour calibration pad for Petiole Pro?

Colour Calibration Pad is a pink background card with specific green colour standards and two markers. It is a board, which is required for accurate chlorophyll content measurement, similar to SPAD.

Does light impact on DGCI measurement?

If you don't use colour calibration pad, then light hugely impacts on the value of DGCI. However, when using colour calibration pad for Petiole Pro in daylight there is no decisive impact on the final reading. Additionally, Petiole Pro works with artificial light environments, except LED grow light.

Is chlorophyll content measured by SPAD and Dark Green Colour Index (DGCI) the same?

in general, yes, it is. Both values represent the Nitrogen status in a plant. If you wish to measure chlorophyll content with smartphone, then you need to work with Dark Green Colour Index (DGCI). This technique could be an affordable alternative that combined with portable meters (for example, SPAD). It provides real-time monitoring of the nutritional status of the crop.

Can I measure chlorophyll content with Petiole Pro without a colour calibration pad?

Yes, it is possible. However, it will not be accurate but you will get the relative measurements. This means if measured on regular basis with the same light conditions, you can get the current Nitrogen status and its change.

Need to know MORE about what PetiolePro can do for you?
Watch videos below to see more detailed information about these powerful features inside of your PetiolePro account:
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PetiolePro gives you THE TOOLS you need to measure leaf area, leaf greenness, fractional vegetation cover, count seeds & flowers and complete your field experiment on time!