When citing cdlTools, please cite both the package and underlying data sources used:

USDA-NASS (2024). National Agricultural Statistics Service Cropland Data Layer. R package version 1.3-4, https://nassgeodata.gmu.edu/CropScape/.

Lisic J, Chen L, Stachelek J (2024). Tools to Download and Work with USDA Cropscape Data. R package version 1.13, https://cran.r-project.org/package=cdlTools.

Corresponding BibTeX entries:

  @Manual{cdl-site,
    title = {National Agricultural Statistics Service Cropland Data
      Layer},
    author = {{USDA-NASS}},
    year = {2024},
    note = {R package version 1.3-4},
    url = {https://nassgeodata.gmu.edu/CropScape/},
  }

  @Manual{cdlTools-package,
    title = {Tools to Download and Work with USDA Cropscape Data},
    author = {Jonathan Lisic and Lu Chen and Jemma Stachelek},
    year = {2024},
    note = {R package version 1.13},
    url = {https://cran.r-project.org/package=cdlTools},
  }