@misc{indiciae82c01a0eb406,
  title = {Geologic research in support of sustainable agriculture},
  author = {L. P. Gough and J. R. Herring},
  year = {1993},
  doi = {10.1016/0167-8809(93)90013-f},
  url = {https://pubs.usgs.gov/publication/70017393},
  note = {Source identifier: 70017393}
}