The study looked at how different fertilizers affect the yield and profit of rapeseed in South Hubei Province. By testing different combinations of N, P, and K fertilizers, they found that certain mixtures led to significant increases in rapeseed yield and income. The best results were seen with specific amounts of N, P2O5, and K2O fertilizers. These findings can help farmers in the region optimize their fertilizer use for maximum crop yield and profit.