Laboratory and pot experiments were conducted to vatuate the
effectiveness of organic matter in combination with urea under surface and
subsurface condition on rice yield production. Results revealed that application of
organic matter decreased the volatilization of ammonia. Subsurface tonditjon was
more effective in reducing N-Ioss than surface one. It was noticed that O.M. addition
stimulate the grain yield for both surface and subsurface circumstances. Maximum
yield was obtained at equal rate of N from inorganic and organic sources. Data also
indicated that surface application gave higher grain/straw ratio as coTpared to the
surface one. Application of organic matter increased the nitrogen content in nee grain
as compared with urea alone. Increasing ratios between organic tter and urea
gradually inaeased the N-CQntent in rice grain. Deep placement of urea combined with organic matter increased P and K
content for both grain and straw as compered with surface applicatlo . The highest
vaiuei uf :h; resi matter. Deep placement was better than surface application on the residual nitrogen, content in soil. .