Field experiments were conducted at the Agricultural College and Research Institute, Madurai for two years (1980 and 1981) during Kharif season to study the effect of different water management practices at three levels of nitrogen on Co 37 (Vaigai) and Co 41 varieties of rice. The results revealed that Co 37 was found suitable for direct sowing in puddled soil. Irrigation to replenish 7 cm depth one day after the disappearance of ponded water was found optimum and resulted in a saving of 26 per cent in irrigation water compared to continuous submergence upto 5 cm depth throughout crop period. Application of 100kg N ha-1 was sufficient to produce higher grain yield than 75 and 125 kg N ha-1.
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