Survey: a new tool to get plant leaf data

Posted by Published on January 30, 2020

We work on Petiole, a leaf area meter in a smartphone, for more than 5 years. Hence, we obtained many insights about our customers and how we can help to do leaf area analysis and plant leaf data using digital technologies. Hence, what we are doing now – we are collecting feedback from our customers to understand what other feature of Petiole is better to…

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Abstract This review presents recent developments in plant photobiology and lighting systems for horticultural crops, as well as potential applications for cannabis (Cannabis sativa and C. indica) plant production. The legal and commercial production of the cannabis plant is a relatively new, rapidly growing, and highly profitable industry in Europe and North America. However, more knowledge transfer from plant studies and horticultural communities to commercial cannabis plant…

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Recently we got a question from the customer of Petiole mobile application related to his need to refer to the app in his dissertation. He was doing research in agriculture science and needed to quote Petiole as an instrument of leaf area measurement. Existing quotes for Petiole mobile application Petiole mobile application is already featured by two scientific articles: Hrytsak, L. R., Herts, A. I.,…

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We get many questions about fixing a problem of camera calibration at Petiole, a mobile application for specific leaf area measurement. That’s why we decided to suggest two general solutions for this issue. Why I cannot calibrate camera in Petiole mobile application? There are many reasons behind this question but we clarify the following three options which mainly cause the problem with camera calibration in…

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How to measure leaf area with smartphone?

Posted by Published on February 7, 2018

In this video, we made a brief how-to measure leaf area with a smartphone and a mobile application Petiole. It clear shows that specific leaf area measurement is not a problem and even to measure total leaf area is not an issue – less than in a minute with nothing special. Only Petiole and its Petiole kit (measuring stand and calibration pad) and three leaves…

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The analysis of the three measurement methods of leaf blade area of young bi-axis apple trees on rootstock 54-118 was made. High accuracy of the measurement results by a method of area calculation within a leaf contour on millimeter graph paper (31, 21 sq.cm ) and with help of a method of computer sight using application “Petiole” on Smartphone with operational system Android (31, 28…

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Abstract Fertilizer plays an important role in increasing rice yield. More than half of all fertilizer applied to the field is not taken up, resulting in environmental damage and substantial economic losses. To address these concerns, a low-cost, coated compound fertilizer named “Xiang Nong Da” (XND), requiring only a single basal application, was studied. A two-year field experiment was conducted to test the effects of…

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