Comparing methods for determination of N uptake in winter wheat

Abstract

Local and current soil nitrogen (N) mineralisation should guide supplemental N rates. To facilitate
this, methods for rapid assessment of crop N uptake (kg N/ha) were tested in five winter wheat
(Triticum aestivum L.) trials in Sweden, around GS39. Four types of measurements were done:
leaf sensors, handheld canopy sensors, multispectral drone cameras, and other, manual methods.
Several options were found to be simple and accurate enough (mean absolute error <5 kg N/ha)
for practical use by farmers and advisors. The best results were obtained when leaf and canopy
measurements were combined.

Keywords

drone; mineralisation; proximal sensor; reflectance; transmittance; zero-plots

Published in

Title: Precision agriculture ’25
Publisher: Wageningen Academic Publishers

Conference

the 15th European Conference on Precision Agriculture, 2025, 29 June- 3 July, Barcelona, Spain

SLU Authors

• Engström, Lena

  • Department of Soil and Environment, Swedish University of Agricultural Sciences
    

• Persson, Kristin

  • Department of Soil and Environment, Swedish University of Agricultural Sciences
    

• Söderström, Mats

  • Department of Soil and Environment, Swedish University of Agricultural Sciences
    

UKÄ Subject classification

Other Agricultural Sciences not elsewhere specified

Publication identifier

• DOI: https://doi.org/10.1163/9789004725232_061
• ISBN: 978-90-04-72522-5
• eISBN: 978-90-04-72523-2

Permanent link to this page (URI)

https://res.slu.se/id/publ/142837