The study looked at how different types of fertilizers affect the growth and yield of chili plants. They tested 10 different treatments, including combinations of organic and inorganic fertilizers. The results showed that the treatment with a mix of NPK fertilizer and poultry manure had the best outcomes, with taller plants, more leaves, flowers, and fruits, as well as higher levels of important nutrients like chlorophyll and protein. This treatment also had the highest levels of NPK in the soil.