Recent research has shown synergy between fungicide (F) and nitrogen (N) applications in winter wheat. (Hooker et al, 2015). This trial investigates if any similar synergy exists in spring barley. The data generated from this trial will be used to validate, and/or update, the Provincial (Ontario) nitrogen recommendations for spring barley (Agronomy Guide, Publication 811). Depending on the findings of this study, this may mean differential N recommendations for barley grown with and without fungicide. Maximum Economic Rate of Nitrogen (MER-N) will be determined, both with and without fungicide, from the N response curves generated from the data obtained.