The researchers studied how nitrogen fertilizer and vermicompost affect the growth and yield of potato plants. They found that using 150 kg of nitrogen per hectare and 12 tons of vermicompost per hectare resulted in the highest plant height, tuber weight, and nutrient content in the tubers. Combining nitrogen fertilizer and vermicompost had a better effect on plant growth and yield compared to using either one alone. To get the best potato yield and reduce pollution, it is recommended to use 150 kg of nitrogen fertilizer and 12 tons of vermicompost per hectare.