Abstract

                                Field experiment with rice crop using N fertiliser, FYM, Sesbania aculeata and Azospirillum at Tamil Nadu Agricultural University farm, Coimbatore revealed that there was a depletion of all the major nutrients with the application of fertiliser N alone. Conjoint addition of green manure with fertiliser N improved the status of available N2 organic carbon, NH4-N, Olsen - P and NH4OAc-K. A substantial increase in the fertility status was also observed with the incorporation of FYM with higher doses of N fertilisers. However, there was a drastic reduction of NO3-N in rice soil with all the treatments studied.

Key words : Rice, FYM, Green manure, Azospirillum, Buildup, Depletion