@misc{indiciaed8d0a24f4093,
  title = {Fertilizer consumption and energy input for 16 crops in the United States},
  author = {Sheila E. Amenumey and Paul D. Capel},
  year = {2013},
  doi = {10.1007/s11053-013-9226-4},
  url = {https://pubs.usgs.gov/publication/70192503},
  note = {Source identifier: 70192503}
}