@misc{indiciaeaf0232a818fa,
  title = {Potash—A vital agricultural nutrient sourced from geologic deposits},
  author = {Douglas B. Yager},
  year = {2016},
  doi = {10.3133/ofr20161167},
  url = {https://pubs.usgs.gov/publication/ofr20161167},
  note = {Source identifier: ofr20161167}
}