OAR@ICRISATStudies on different sources and levels of sulphur on productivity and quality of rainfed sunflower (Helianthus annus L.)B NAbilashauthorOil seed crops play a vital role in Indian agriculture as food for human and animals. Sunflower being one of the important edible oil crop in the world next to soybean, holds great promise because of its short duration (90-100 days), high seed multiplication ratio, wider adaptability, photo-insensitive, higher water use efficiency and drought tolerance. Presently in India, sunflower is cultivated in an area of 0.69 m. ha with a production of 0.55 m. t with an average productivity of 791 kg ha-1. In Karnataka, it is grown in an area of 0.44 m. ha with a production of 0.30 m. t with productivity of 670 kg ha-1 (www.Indiastat.com, 2013-14). Major sunflower area is concentrated in the northern districts of Bijapur, Gulbarga, Raichur and Dharwad, which accounts for nearly 85 percent of total State acreage. In India, sunflower cultivation is progressively picking up especially in rabi and summer seasons. In recent times, the yield potential of the crop is reduced due to little amounts of organic manures used, poor recycling of crop residues, wide spread secondary and micronutrient deficiencies and insufficient use of sulphur containing fertilizers. The most commonly encountered problem is the occurrence of poor seed set and unfilled seed resulting in low oil recovery percentages. The essentiality of sulphur in the biosynthesis of oil in sunflower has been proved by Bhagat et al., 2005. They indicated that the oil content in sunflower seed was increased by sulphur application. It also increased seed yield due to increase in the yield components. Crop uptake of sulphur by oil seeds is as much as that of phosphorus. Average sulphur uptake per tonne of economic yield of sunflower in India is in the range of 6.2 to 11.7 kg.Others2017University of Agricultural Sciences, Raichur;Department of Soil Science and Agricultural Chemistry College of Agriculture RaichurThesis

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