INTERACTIVE EFFECT OF SULPHUR AND NITROGEN ON PRODUCTIVITY OF SUNFLOWER (HELIANTHUS ANNUUS L.)

Abstract

Interactive effect of sulphur and nitrogen on productivity of sunflower (Helianthus annuus L.) was studied through field experiment executed on loamy soil at agronomic research farm, University of Agriculture Faisalabad, Pakistan during spring 2012. The experiment was comprised of four levels of nitrogen (0, 60, 120, 180 kg/ha) and four levels of sulphur (0, 25, 50, 75 kg/ha) laid out in RCBD with factorial arrangement replicated thrice. Maximum achene yield (2996 kg/ha) was obtained when sulphur and nitrogen were applied @ 75 and 120 kg/ha, respectively which was the outcome of better growth (11% higher plant height) and yield contributing attributes i.e. more number of achenes per head (1330.7), dominant head diameter (25.3cm) and higher 1000- achene weight (55.8g).