Influence of sulphur and magnesium on growth and yield of sunflower (Helianthus annuus)

The trials were ro conducted during summer and rainy seasons (kharif) of 1993 to study the influence of sulphur and magnesium fertilization opt the yield attributes and seed yield of 'Morden' sunflower (Hehanthus annuus L.). Application of sulphur and magnesium increased the plant growth. Summer crop established early having the higher shoot length followed by kharif one. Combined application of sulphur at 45 kg/ha and magnesium at 45 kg/ha reduced the days to 50% flowering in both the seasons by about 3 days, increased the number of filled seeds/head, disk weight, 100-seed weight and kernel : husk ratio significantly. The seed yield was also increased by 6.2 and 14.9% during summer and kharif seasons respectively.