Researchers conducted a study to determine the optimal fertilizer doses for brinjal plants by analyzing soil and nutrient levels. They tested different combinations of organic and inorganic nutrients on brinjal crops to achieve balanced fertilization. The study found that to produce one quintal of brinjal fruit, 0.464 kg of nitrogen, 0.112 kg of phosphorus, and 0.208 kg of potassium are needed. Soil, organic fertilizers, and inorganic fertilizers all play a role in providing these essential nutrients to the plants. The study generated equations to help farmers efficiently use fertilizers and improve their economic conditions.