Effect of different sources and levels of sulphur on yield, sulphur uptake and quality of rainfed sunflower (Helianthus annus L.)

A field experiment conducted on sunflower during kharif of 2016 in vertisol under rainfed condition at Main Agriculture Research Station, Raichur revealed that Among the different sources of sulphur, significantly higher grain and stalk yield (1648 and 2504.3 kg ha-1), oil content and oil yield (37.84 % and 624.84 kg ha-1), protein content and protein yield (16.22 % and 268.68 kg ha-1), sulphur availability and total sulphur uptake in soil after harvest of the crop (16.35 kg ha-1 and 15.56 kg ha-1) was recorded with ammonium sulphate compared to gypsum. Among the different levels of sulphur, significantly higher grain and stalk yield (1719.83 and 2558.75 kg ha-1), oil content and oil yield (38.23 % and 657.75 kg ha-1), protein content and protein yield (17.08 % and 294.33 kg ha-1), sulphur availability and total sulphur uptake in soil after harvest of the crop (17.55 kg ha-1 and 18.07 kg ha-1) was recorded with 45 g S ha-1 fallowed by 30 kg S ha-1 and 15 kg S ha-1.