Effects of anhydrous ammonia application on yield and yield component of sunflower (helianthus annus l.)

The aim of the research was to determine the effects of Anhydrous ammonia application on yield and yield components of sunflower. Field experiment was conducted in Tekirdag at Trakya Region, Turkey during 2014 and 2015. Three different methods was planned. Anhydrous ammonia application (M1), the traditional condition (M2) and the control (M3). Anhydrous ammonia application was made once before the sowing period. At the M2 is the method used by local farmers. No nitrogen fertilization was at the M3 method. In this research, head diameter, stem diameter, plant height, hull rate, harvest index, 1000 seed weight, grain yield and oil content were investigated. Results showed that Anhydrous ammonia has a positive effect on yield and yield parameters statistically (P< 0.05). Significant differences were found between methods each year. The maximum grain yield (312.02 kg da-1) was observed in M1 methods while the minimum seed yield (226.55 kg da-1) was observed in M3 without application of N fertilizer both years.