Published September 28, 2026 | Version v1
Technical note Open

Protocol for Obtaining Petiole Sap

Contributors

  • 1. ROR icon James Hutton Institute

Description

Petiole sap nitrate concentration is a sensitive indicator of crop nitrogen status of various vegetable species. This makes it an interesting option for N management in vegetable production as it can enable rapid measurement and subsequent correction of deficient crop N status.

The use of small rapid analysis systems enables on-farm measurement of sap [NO3−–N] to be made immediately after sampling (SOP 26).

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EU_ECONUTRI_SOP_036.pdf

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Additional details

Funding

European Commission
ECONUTRI - Innovative concepts and technologies for ECOlogically sustainable NUTRIent management in agriculture aiming to prevent, mitigate and eliminate pollution in soils, water and air 101081858