AgResearch
Browse
Measuring-Real-Time-Nitrate-Leaching_Final-Report_July-2022.pdf (641.63 kB)

Measuring real time nitrate leaching from a tile drained Hawkes Bay onion field: Final report

Download (641.63 kB)
report
posted on 2024-06-21, 04:02 authored by Jamie Thompson
The data showed a strong linear relationship between the N concentration measured by the sensor and in the grab sample (sensor N concentration = 1.09 × grab sample N concentration + 0.14, R2 of 97%). This indicates that the sensor can provide a good indication of sump nitrate-N concentrations, and that with calibration the accuracy can be improved further. The ability to measure real-time nitrate concentrations in the drainage water provided data that showed clear links between management practices, rainfall events and N leaching. Both modelling and real-time data also showed that modified agricultural practices, such as the use of catch crops, could reduce nitrate losses to ground water.

Funding

Funded by the New Zealand Ministry for Business, Innovation and Employment's Our Land and Water National Science Challenge (Toitū te Whenua, Toiora te Wai) as part of project Rural Professionals Fund 2021–22

History

Publication date

2019-05-30

Language

  • English

Does this contain Māori information or data?

  • No

Usage metrics

    Licence

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC