@misc{indiciae92e2607c96be,
  title = {Tillage practices in the conterminous United States, 1989-2004: Datasets aggregated by watershed},
  author = {Nancy T. Baker},
  year = {2011},
  doi = {10.3133/ds573},
  url = {https://pubs.usgs.gov/publication/ds573},
  note = {Source identifier: ds573}
}