bBIO-ECONOMICS OF AUTUMN PLANTED SUNFLOWER (Helianthus annuus L.) HYBRIDS UNDER DIFFERENT NPK APPLICATIONS

Studies were undertaken to evaluate the response of autumn planted sunflower (Helianthus annuus L.) to different levels of N, P and K fertilizers at the Agronomic Research Farm, University of Agriculture, Faisalabad during, 2004 and 2005. Treatments comprised five N levels (0, 60, 90, 120 and 150 kg ha), five P levels (0, 30, 60, 90 and 120 kg ha), four K levels (0, 60, 90 and 120 kg ha) in different combinations and two hybrids viz. FH-314 (standard height) and FH-245 (semi dwarf). Hybrid FH-314 produced significantly higher achene yield (2725.41 kg ha) than that of FH-245. There was a progressive increase in achene yield and yield components with increasing levels of N, P and K. The highest achene yield (3023 kg ha) and highest net benefit (Rs.19743) was obtained when the crop was fertilized @ 120:90:60 kg NPK ha