Selles, F.Lemke, R.Zentner, R.P.Campbell, C.A.2018-08-052018-08-052006-03-02http://hdl.handle.net/10388/9418Fertilizer nitrogen use efficiency (NUE) is normally low, and has led to the idea that a large proportion of N applied as fertilizer is lost from the soil. However, N balances calculated for a long-term rotation study at Swift Current indicate that losses of fertilizer N from the soil are small, and comparison of cumulative N balances with actual soil organic matter measurements show that an overwhelming proportion of this N is cycled through the organic matter, through microbially mediated processes, enhancing the fertility of the soil.enAttribution-NonCommercial-NoDerivs 2.5 Canadafertilizernitrogen use efficiencynitrogen balancescropping systemsPresentation