To cite package ‘Roryza’ in publications use:

  Bouman B, Kropff M, Tuong T, Wopereis M, ten Berge H, van Laar H,
  Hijmans R (2026). _Roryza: ORYZA Rice Crop Growth Simulation Model_.
  R package version 0.1-2, <https://github.com/cropmodels/roryza>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {Roryza: ORYZA Rice Crop Growth Simulation Model},
    author = {Bas A.M. Bouman and Martin J. Kropff and To Phuc Tuong and Marco Wopereis and H.F.M. {ten Berge} and H.H. {van Laar} and Robert J. Hijmans},
    year = {2026},
    note = {R package version 0.1-2},
    url = {https://github.com/cropmodels/roryza},
  }