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Smart farming on the rise – using drone and satellite data to manage fertilization and irrigation

PhD defence, Tuesday 23 February 2021, Junxiang Peng

2021.02.23 | Helle Mitzi Thomsen Reichl

Junxiang Peng

During his PhD study, Junxiang Peng explored the potential of drone and satellite (Sentinel-2) multispectral and thermal data for estimating plant biomass, nitrogen deficiency and drought stress. Junxiang Peng linked the remote sensing data with growth-, nitrogen- and water status parameters of potato, obtained in experiments on Danish fields for multiple years, by a set of machine learning and biophysical modelling, including random forest regression and two-source energy balance. Data from the satellite and especially the drone demonstrated large potential for assessment of potato growth, management of nitrogen fertilizer and irrigation need.

The new research findings are of particular importance for the digital agriculture and the smart farming industry, and they are being incorporated into ongoing research and operational platforms.


The PhD study was completed at Department of Agroecology, Faculty of Technical Sciences, Aarhus University.

This summary was prepared by the PhD student.

Time: Tuesday, 23 February 2021 at 10.00
Place: The PhD defence will be held online. To receive a link to the event, please send an e-mail to Karina Rysholt Christensen; kch@agro.au.dk

Title of PhD thesis: Managing and optimizing fertilization and irrigation of potato by remote sensing from small unmanned air vehicles and Sentinel-2 satellites

Contact information: Junxiang Peng, e-mail: Junxiang.peng@agro.au.dk, tel.: +45 31885236

Members of the assessment committee:

Associate Professor Monica Garcia, Department of Environmental Engineering, Technical University of Denmark, Denmark

Professor Dr. Henning Kage, Institute of Crop Science and Plant Breeding, Christian-Albrechts-Universität zu Kiel, Germany

Associate professor Lars Elsgaard (chair), Department of Agroecology, Aarhus University, Denmark

Main supervisor:
Professor, Mathias Neumann Andersen, Department of Agroecology, Aarhus University, Denmark

Co-supervisor:
Researcher, Kiril Manevski, Department of Agroecology, Aarhus University, Denmark

Academic employee, Kirsten Kørup, Department of Agroecology, Aarhus University, Denmark

Language: The PhD dissertation will be defended in English


The defence is public.
Due to the coronavirus situation, the PhD thesis will not be available for reading at the offices of the PhD administration. Instead, interested parties may send an e-mail to gradschool.tech@au.dk to receive a digital copy of the PhD thesis. Please note, it may in certain cases be necessary to make an individual arrangement to read the PhD thesis.

PhD defence
17427 / i43