Real-time detection of ammonium in soil pore water

Rotem Yupiter, Shlomi Arnon, Elad Yeshno, Iris Visoly-Fisher, Ofer Dahan

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


The development of technologies for continuous measurement of nitrogen forms in the soil is essential for optimizing the application of fertilizers in agriculture and preventing water-resource pollution. However, there is no effective commercial technology available for continuous monitoring of ammonium species in soil pore water. This work investigates an approach for real-time measurement of ammonium in soil water using near-infrared transmission spectroscopy and partial least squares regression (PLSR) for spectral analysis. The PLSR model was trained using soil pore water collected from various soils spiked with ammonium to achieve a wide concentration range. The monitoring approach was then validated through transport experiments in a soil column. The results demonstrated capabilities for real-time tracking of the temporal variation in soil ammonium concentration and potential utilization in agronomical or environmental sensing.

Original languageEnglish
Article number25
Journalnpj Clean Water
Issue number1
StatePublished - 1 Dec 2023

ASJC Scopus subject areas

  • Water Science and Technology
  • Waste Management and Disposal
  • Pollution
  • Management, Monitoring, Policy and Law


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