To cite package ‘mrvalidnitrogen’ in publications use:

  Bodirsky B (2024). _mrvalidnitrogen: madrat data preparation for
  validation purposes of nitrogen budgets_. R package version 1.6.6,
  <https://github.com/pik-piam/mrvalidnitrogen>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {mrvalidnitrogen: madrat data preparation for validation purposes of nitrogen
budgets},
    author = {Benjamin Leon Bodirsky},
    year = {2024},
    note = {R package version 1.6.6},
    url = {https://github.com/pik-piam/mrvalidnitrogen},
  }