Effect of planting methods, source and level of nitrogen on the growth andyield of rice (Oryza sativa) and on succeeding wheat (Triticum aestivum)

A field experiment was conducted during the rainy (kharif) and winter (rabi ) seasons of 1996-97 and 1997-98 to study the effect of source and level of nitrogen on growth and yield of rice (Oryza sativa L.) under different pla nting methods and its residual effect on wheat (Triticum aestivum L. emend. Fiori & Paol.). Transplanting methods proved best for maximum grain yield (45.35 q/ha), recording significantly higher yield than broadcasting and di rect-seeding methods. Urea supergranule (USG) exhibited its superiority by recording significantly higher value of all the yield-contributing characte rs, nitrogen uptake and consistently resulted in significantly higher grain yield than prilled urea (PU), the increase being 12.0 and 10.2% during 199 6 and 1997 respectively. The increased level of N improved the yield and yi eld attributes. Maximum values of yield attributes and the grain yield were recorded with the highest level of nitrogen (120 kg/ha). The grain yield i ncreased with 120 kg N was 29.7 and 23.7% over the 60 kg N/ha in 1996 and 1 997 respectively.