Abstract

                                To find out the effect of irrigation regimes and phosphorus levels with phosphate soulbilizing micro-organisms on yield components and yield of hybrid sunflower, field experiments were conducted in split-plot design at Tamil Nadu Agricultural University with three irrigation regimes and two levels of phosphorus with and without phosphobacteria application. Irrigating at higher level (Irrigation water: Cumulative pan evaporation ratio of 0.75) of irrigation at 5 cm depth recorded higher yield components and seed yield of sunflower. Similarly application of 90 kg P20 ha along with phosphobacteria application significantly influenced the yield components and yield of sunflower.

Key words : Sunflower, irrigation, phosphorus, phosphate solubilizing micro-organisms, yield