Abstract

A study of response of rice plants to cultural treatments like time of planting under different fertiliser levels is for many reasons a very important problem. With the object of combining fertiliser responsiveness and stiff straw characteristic of the japonicas, indica x japonica hybridiz tion projects were undertaken as early as 1952 and as a result of intensive study of a large number of indica x japonica hybrids and their derivatives in the succeeding years, a few cultures were found promising. These promising cultures were fixed up for detailed study with different dates of planting and fertiliser levels. The present studies were undertaken at Paddy Breeding Station, Coimbatore with a view to find out differential responses of a few indica x japonica rice cultures to agronomic factors namely time of planting and different levels of fertilisers as recommended by the Rice Committee of the Indian Council of Agricultural Research.

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