@misc{indiciae9eb5438aa80b,
  title = {Herbicide and nitrate variation in alluvium underlying a cornfield at a site in Iowa County, Iowa},
  author = {S. J. Kalkhoff and M.G. Detroy and K. Cherryholmes and R.L. Kuzniar},
  year = {2007},
  doi = {10.1111/j.1752-1688.1992.tb04012.x},
  url = {https://pubs.usgs.gov/publication/70169037},
  note = {Source identifier: 70169037}
}