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

A field experiment was conducted during the rainy (kharif) and winter (rabr) 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 planting methods and its residual effect on wheat (Triticum aestivum L. emend. Fiori Paol.). Transplanting methods proved best for maximum grain yield (45.35 qlha), recording significantly higher yield than broadcasting and direct seeding methods. Urea supergranule (USG) exhibited its superiority by recording significantly higher value of all the yield contributing characters, nitrogen uptake and consistently resulted in significantly higher grain yield than prilled urea (PU), the increase being 12.0 and 10.2% during 1996 and 1997 respectively. The increased level of N improved the yiel% nd yield attributes. Maximum values of yield attributes and the grain yield wer recorded with the highest level of nitrogen (1 20 kglha). The grain yield increased with 120 kg N was 29.7 and 23.7% over the 60 kg Nlha in 1996 and 1997 respectively.