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Variable Rate nitrogen fertilization with digital technologies in winter wheat
Project: The project is a collaboration between Agroscope, ETH Zurich and the Swiss Future Farm.
Research question: Can drone, satellite imagery, and field data be used to optimize nitrogen application under field conditions and improve crop nitrogen fixation rates?
Experiment type: subplots with different fertilization strategy based on aerial imagery (drone and satellite), historical and current field data.
Trial period: 2018-2021
The following fertilization strategies are investigated:
Standard (ST): Normal flatrate fertilizer application
Variable Rate (VR): Subarea-specific variable fertilization based on aerial photographs
No nitrogen fertilization (NF): Reference
Applied technologies and equipment
Automatic guidance system with RTK accuracy of ± 2cm
Seed drill, fertilizer spreader, and sprayer with Section Control
Drone DJI Phantom 4 Pro with Parrot Sequoia and Sentinel-2 satellite imagery
Fertilizer spreader Sulky X40+ Econov with Variable Rate functionality and boundary spreading control
Results to date
The 2018 - 2020 results are compiled in the following publication:
The scientific publication on the experiments can be found at the following link:
Argento, Francesco & Anken, Thomas & Abt, F. & Vogelsanger, E. & Walter, A. & Liebisch, Frank. (2020). Site-specific nitrogen management in winter wheat supported by low-altitude remote sensing and soil data. Precision Agriculture.