The field experiments were conducted to evaluate the effect of inorganic fertilizers along with organic manures at the Experimental Farm, Department of Agronomy, Annamalai University, Tamil Nadu. The treatments were tested in Split- plot Design and replicated thrice. It was observed that the grain yield, straw yield and harvest index of rice crop influenced by combined application of inorganic fertilizers and organic manures. The application of 150% of recommended NPK + 75% of recommended dose of Vermicompost @ 3.75 t ha-1 + Azophos @ 10 kg ha-1 + in situ application of Azolla @ 10 kg ha-1 on 10 DAT + foliar application of seaweed extract @ 2.0% on 15 and 30 DAT recorded higher grain, straw yield and harvest index. This was on par with 125% of recommended NPK + 75% of recommended dose of Vermicompost @ 3.75 t ha-1 + Azophos @ 10 kg ha-1 + in situ application of Azolla @ 10 kg ha-1 on 10 DAT + foliar application of seaweed extract @ 2.0% on 15 and 30 DAT.