Engström, Lena
- Institutionen för mark och miljö, Sveriges lantbruksuniversitet
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.
drone; mineralisation; proximal sensor; reflectance; transmittance; zero-plots
Titel: Precision agriculture ’25
Utgivare: Wageningen Academic Publishers
the 15th European Conference on Precision Agriculture, 2025, 29 June- 3 July, Barcelona, Spain
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https://res.slu.se/id/publ/142837