Cultural practices like planting density and fertilizer application affect the yield and quality of rapeseed. For the Suyou 4 cultivar, the best practices include a planting density of 7,500 plants per 667 square meters, 22 kg of nitrogen fertilizer per 667 square meters, and a specific fertilizer distribution ratio. These practices can lead to a high yield of 207.33 kg per 667 square meters. The fertilizer application rate has the biggest impact on yield, followed by planting density and fertilizer distribution ratio. More pods are produced with higher density and fertilizer rate, while seed weight increases with higher rate and lower density. The key to high yield is having more effective pods per area. Oil and protein content in rapeseed change with different fertilizer applications.