Field experiments conducted during kharif 1992, summer and rabi 1993 at Agricultural Research Station, Bhavanisagar with 4 levels of sulphur (0, 15, 30 and 45 kg ha¹) and 4 levels of magnesium (0, 15, 30 and 45 kg ha'') showed that sulphur fertilization at 45 kg ha¹ increased the seed yield of sunflower significantly over control by 6.2 per cent in summer, 9.1 per cent in rabi and 14.5 per cent in kharif. The effect was more pronounced in kharif grown crop followed by rabi and summer. Added Mg failed to exert any influence. Similar influence was observed in stalk yield also. But in terms of percentage, the responses were 46.0, 32.4 and 5.1 per cent over control during kharif. rabi, and summer, respectively. Due to sulphur application at 45 kg ha" the oil yield was increased by 17.1 per cent in rabi followed by kharif (11.5 per cent) and summer (9.5 per cent).
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