Inorganic fertilizers application effect on Helianthus annuus crop yield indicators in western Azerbaijan

The paper presents the results of studies of the effect of inorganic fertilizers on the structural indicators of Helianthus annuus crop yield in the western part of Azerbaijan. As a result of the studies carried out, it can be concluded that there was a positive effect when fertilizer application. So, there was an increase in the diameter of the basket by 0.8-2.3 cm, the number of achenes in the basket - 54.7-204.6 pcs, the mass of seeds in the basket - 5.5-24.1 g, and an increase in the mass of 1000 seeds - by 3.5-13.7 g in comparison with the non-fertilizer control. To obtain a high and high-quality sunflower seed yield and restore soil fertility on the irrigated chestnut soils of the Ganja-Gazakh zone, it is recommended that farms use inorganic fertilizers annually at the N120P120K120.