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TIDA-00554: Wavelength Range for Nitrogen Measurement

Jeff Yang
Prodigy 10 points
Part Number: TIDA-00554

Our robotics lab is attempting to do in-situ measurement of total nitrogen level of soil, particularly around plant roots. I have read a lot of research papers looking for the range of wavelength for total nitrogen measurement and the result of the search has been inconsistent. Would this sensor’s range support our need for total nitrogen measurement? If so what is the range that we should be looking for. And due to our demands of in-situ measurement, would unprocessed soil contributes too much noise for the sensor?

  • 0
    TI__Mastermind 23070 points

    Hello Jeff,

    We do not have expertise in the Nitrogen level detection in soil. We will not be able to answer DLPNIRNano EVM can be used for this application.

    DLPNIRNANOEVM Evaluation board | TI.com

    You need to identify wavelength of interest and wavelength resolution required for this application. The DLPNIRNano EVM supports 900-1700nm wavelength and optical resolution is 10nm. 

    I was able to find the following paper on this application.  This study used 900-1700nm spectral range. Based on this paper, you may be able to use this EVM. You need to verify it.

    Detection of Soil Nitrogen Using Near Infrared Sensors Based on Soil Pretreatment and Algorithms - PMC (nih.gov)

    Please also note that in such application system design and set up is very critical for consistent and repeatable result. Some of the factors which could affects results are:

    1. Taking period white reference calibration

    2. Consistent sample presentation

    3. Uniformity of sample 

    Please let us know if you have any additional question.

    regards,

    Vivek