To cite package ‘spreval’ in publications use:

Grabow G (2022). spreval: Evaluation of Sprinkler Irrigation Uniformity and Efficiency. R package version 1.1.0, https://github.com/glgrabow/spreval.

Corresponding BibTeX entry:

  @Manual{,
    title = {spreval: Evaluation of Sprinkler Irrigation Uniformity and
      Efficiency},
    author = {Garry Grabow},
    year = {2022},
    note = {R package version 1.1.0},
    url = {https://github.com/glgrabow/spreval},
  }