@misc{indiciae075d981ea09a,
  title = {Preventing nitrate tolerance.},
  author = {R B Shaffer and D L Fritz},
  year = {1991},
  doi = {10.1097/00152193-199107000-00022},
  url = {https://pubmed.ncbi.nlm.nih.gov/1808568/},
  note = {Source identifier: 1808568}
}