The study looked at how different types of rice, levels of nitrogen fertilizer, and planting densities affect the quality of rice grains. They found that the type of rice had the biggest impact on grain quality, with some differences between the two varieties tested. Increasing nitrogen fertilizer improved milling and nutritional quality but decreased appearance and cooking quality. The planting density also affected grain quality, with lower density being better for one variety and medium density being better for the other. Overall, the study shows that choosing the right rice variety, nitrogen level, and planting density is important for getting high-quality rice grains.