Soil testing for specific fertilizers can increase Satsuma Mandarin yield and income compared to traditional fertilization methods. Using formulated nitrogen, phosphate, potash, and magnesium fertilizers resulted in a 191 kg increase in yield and an 8.64% higher yield compared to traditional methods. Formulated nitrogen, phosphate, and potash fertilizers also increased yield by 131 kg and income by 315.95 yuan per 667 m2. These fertilization methods improved fruit size, number, and weight.