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In northwest India, spring maize water productivity can be increased with subsurface drip irrigation. Therefore, a field experiment was conducted in a split‐plot design for 2 years to assess the effect of three nitrogen levels (125 [N1], 100 [N2] and 75 [N3] kg N ha−1) in the main plots and seven irrigation regimes (six subsurface and one surface drip) in the subplots on water productivity of spring...