Efttet of nitrogen and phosporus nutrition applied to leaves was studied in field experiments at differents stages of development of sunflower during 1987-1988. In 1987, 5, 10, 15 and 20 kg/ha N and 5+5, 10+10, 15+15, 20+20 kg/ha N was used as chemical leaf fertilizer at the stage of budding and budding+10% flowering, respectively. In the next year, at budding stage all the plots were sprayed with dose of 10 kg/ha N as a basic treatment with the aim to incrcase the achene yield. At full bloom, these plots have additionally been treatedwith 1, 3, 5 and 7 kg doses of P for increasing the oil content. The greatest head diameter, achene yield/head and oil yield/head heve been achicved with doses 10 kg/ha (at budding stage) and 10+10 kg/ha N (budding+10% flowering stage). Achene oil content was decreased by treatments with N, whereas doses of P applied at full bloom had no effect on it. Effect of increasing N-doses may be fitted to a quadratic equation.