15.15.15 Compound fertilizer contains nitrogen, phosphorus (as P2O5), and potassium (as K2O) in equal proportions. It should be preferred for balanced fertilization, especially in potassium-deficient soils. In addition to the three main nutrients in its composition, nitrogen, phosphorus, and potassium, it also contains sulfur in the form of sulfate (SO4 -2) in the form that plants can absorb, varying between 5.5%, 20%, and 25%, depending on the raw material used. The sulfur present in the structure of these fertilizers can help increase the resistance of plants to diseases, drought, and cold, as well as improve the yield and quality of products obtained from all cultivated plants.
It is used as a base fertilizer (underground) in all regions of our country, in field crops (beets, potatoes, sunflowers, corn, cotton), fruit trees (stone and pome fruits, citrus fruits, grapes, olives, hazelnuts, and bananas), and all summer and winter vegetables.
