To cite SoilTaxonomy in publications use:

  Brown, A., Beaudette, D. (2023). SoilTaxonomy: A System of Soil
  Classification for Making and Interpreting Soil Surveys. R package
  version 0.2.3. <https://CRAN.R-project.org/package=SoilTaxonomy>

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {SoilTaxonomy: A System of Soil Classification for Making and Interpreting Soil Surveys},
    author = {Andrew Brown and Dylan Beaudette},
    note = {R package version 0.2.3},
    url = {https://CRAN.R-project.org/package=SoilTaxonomy},
    year = {2023},
  }