@misc{indiciae2a71584372be,
  title = {Agroecosystems, nitrogen-use efficiency, and nitrogen management.},
  author = {Kenneth G Cassman and Achim Dobermann and Daniel T Walters},
  year = {2002},
  doi = {10.1579/0044-7447-31.2.132},
  url = {https://pubmed.ncbi.nlm.nih.gov/12078002/},
  note = {Source identifier: 12078002}
}