@misc{indiciae41a51ba6c74b,
  title = {Nitrogen in the environment: sources, problems, and management.},
  author = {R F Follett and J L Hatfield},
  year = {2001},
  doi = {10.1100/tsw.2001.269},
  url = {https://pubmed.ncbi.nlm.nih.gov/12805892/},
  note = {Source identifier: 12805892}
}