Feedback control of water supply in an NFT growing system

Th.H. Gieling, H.J.J. Janssen, H.C. de Vries, P. Loef

    Research output: Chapter in Book/Report/Conference proceedingConference paper

    Abstract

    The paper explores a concept of irrigation control, where the supply of nutrient solution is controlled without the use of predictive uptake models but rather by the use of a direct feedback of a drain flow measurement. This concept proves to be a viable approach. Results are presented, showing the compensation of changes in water up-take due to variations in global radiation, with a very tight control of the drain flow, keeping it constant over long periods of time. A tipping-bucket type flow sensor and its use in controlled water supply to a to-mato crop is described. A calibration procedure for the tipping-bucket instrument is presented.
    Original languageEnglish
    Title of host publicationProceedings of the Third International Symposium on Sensors in Horticulture, ISHS - Sensors in Horticulture, Tiberias (IL), August 1997
    Pages19-30
    Publication statusPublished - 2001

    Publication series

    NameActa Horticulturae
    Number562
    ISSN (Print)0567-7572

    Fingerprint Dive into the research topics of 'Feedback control of water supply in an NFT growing system'. Together they form a unique fingerprint.

  • Cite this

    Gieling, T. H., Janssen, H. J. J., de Vries, H. C., & Loef, P. (2001). Feedback control of water supply in an NFT growing system. In Proceedings of the Third International Symposium on Sensors in Horticulture, ISHS - Sensors in Horticulture, Tiberias (IL), August 1997 (pp. 19-30). (Acta Horticulturae; No. 562). https://edepot.wur.nl/25897