Results of the 1966–67 Coordinated Trials of the Dwarf Wheat Varieties

Coordinated uniform high fertility conditions trials were conducted at 24 centres throughout the country during 1966–67 with 15 dwarf and one tall wheat varieties. The objective was to study the response of varieties to different doses of nitrogenous fertilizer. For this report, data were available from 16 centres. Nature of response studies regarding the performance of the top-yielding eight varieties showed that in most of the cases the yields could be represented satisfactorily by second degree curves. In Punjab, Haryana and Delhi, good responses were obtained even upto 204 kg./ha. while, for other regions, such high response rates did not go beyond 135 kg./ha. It seems that in short wheat-growing season areas responses to high doses of nitrogen application are not realized.

The varieties K. 227, S. 308, J. E. S. 227 and S. 331 gave uniformly high yields. Besides, S. 308 and S. 331 showed also higher rates of yield responses.