During her PhD studies, Jingru Yin conducted a two-year field campaign focusing on nitrogen losses through nitrous oxide (N₂O) emissions and nitrate (NO₃^-) leaching. These two major loss pathways pose a threat to climate and groundwater quality while reducing nitrogen use efficiency in crop production.

Jingru investigated nitrogen dynamics within an integrated soil–crop–climate system, capturing variability in both space and time. Measurements of soil properties, crop nitrogen uptake, microtopography, and weather conditions were integrated to identify the key drivers of nitrogen loss.

The findings advance system-level understanding of when, where, and why nitrogen losses occur and support the development of more integrated and sustainable nitrogen management strategies under increasing climate challenges. 

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

This summary was prepared by the PhD student.

Time: Thursday, 30 April 2026 at 12:00 
Place: Building 8814, room 3075, Auditorium Foulum, Department of Agroecology, AU Foulum, Blichers Allé 20, 8830 Tjele
Title of PhD thesis: Spatial and Temporal Variability of Nitrogen Losses in Danish Arable Agroecosystems
Contact information: Jingru Yin, e-mail: joory.yin@gmail.com, tel.: +45 91809009
Members of the assessment committee:
Associate Professor Alessia Perego, Department of Agricultural and Environmental Sciences, University of Milan, Italy
Associate Professor Søren Marcus Pedersen, Department of Food and Resource Economics, University of Copenhagen, Denmark
Professor Iris Vogeler Cronin (chair), Department of Agroecology, Aarhus University, Denmark
Main supervisor: Professor Davide Cammarano, Department of Agroecology, Aarhus University, Denmark
Co-supervisor:
Tenure Track Assistant Professor Takashi S.T. Tanaka, Department of Agroecology, Aarhus University, Denmark
Professor Diego Abalos, Department of Agroecology, Aarhus University, Denmark
Professor Mathias Neumann Andersen, Department of Agroecology, Aarhus University, Denmark
Language: The PhD dissertation will be defended in English

The defence is public.
The PhD thesis is available for reading at the Graduate School of Technical Sciences/GSTS, Ny Munkegade 120, building 1521, 8000 Aarhus C.