Abstract

                                The striking contrast of high rice yields of Japan (5240 kg/ha) to low rice yields of India (1540 kg/ha) is generally attributed to particular strains that respond to high dosage of fertilizers and their successful management. The cheapest and most efficient way of increasing rice yields in India is to grow high yielding and higher fertilizet responsive varieties. ADT. 27 is a hybrid characterised by its high fertility response, fairly resistant to lodging, short in duration and suited to both Kuruvai and Navarai" seasons. This variety is grown in large area in Tamil Nadu and particularly in Thanjavur district. A study was taken up to find out the responsiveness of ADT 27 to the graded doses of N under different plant spacings.

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