Ammonia volatilization and nitrogen retention: how deep to incorporate urea?

@article{Rochette2013AmmoniaVA,
  title={Ammonia volatilization and nitrogen retention: how deep to incorporate urea?},
  author={Philippe Rochette and Denis A. Angers and Martin H. Chantigny and M Gasser and J Douglas Macdonald and David E. Pelster and Normand Bertrand},
  journal={Journal of environmental quality},
  year={2013},
  volume={42 6},
  pages={1635-42}
}
Incorporation of urea decreases ammonia (NH) volatilization, but field measurements are needed to better quantify the impact of placement depth. In this study, we measured the volatilization losses after banding of urea at depths of 0, 2.5, 5, 7.5, and 10 cm in a slightly acidic (pH 6) silt loam soil using wind tunnels. Mineral nitrogen (N) concentration and pH were measured in the top 2 cm of soil to determine the extent of urea N migration and the influence of placement depth on the… CONTINUE READING