Composite fertilizers are obtained by mixing nitrogen, phosphorus and potassium in certain proportions. The first number in the compound fertilizer is nitrogen (N), the second number is phosphorus (P) and the third number is potassium (K) in %. In 100 kilos of NPK (15-15-15) fertilizer; There are 15 kilos of pure Nitrogen, 15 kilos (P2O 5) Phosphorus and 15 kilos of potassium (K2O). This fertilizer, which eliminates the potassium deficiency of the soil, is used in the cultivation of fruits and vegetables such as corn, sunflower, sugar beet, tobacco, potato, fruit, vineyard, olive and citrus in soils where quality is important but poor in potassium. Since Turkish soils are poor in nitrogen and phosphate, this fertilizer will be beneficial for agriculture; It will give even more beneficial results in places where potassium is needed. Phosphorus in its composition has a high solubility in water.
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