@article{Isla:62021,
      author        = "Isla, R. and Salmerón, M. and Cavero, J. and Yagüe, M.
                       -R and Quílez, D.",
      title         = "{Utility of the end-of-season nitrate test for nitrogen
                       sufficiency of irrigated maize under mediterranean
                       semi-arid conditions}",
      year          = "2015",
}