A study was done to see how different ways of adding nutrients affect the yield of Brinjal plants. They tried nine methods, including using different types of fertilizers and manure. The best results came from a mix of chemical fertilizer and farmyard manure. This method gave the most fruits per plant and the highest overall yield. Using no fertilizer at all gave the worst results. In terms of money, the best return came from the mix of chemical fertilizer and farmyard manure, while using no fertilizer gave the lowest return.