The study looked at how different types of fertilizers and bio-fertilizers affect the growth and yield of chilli plants. They tested various combinations of organic manures, NPK levels, and bio-fertilizers on a specific chilli variety. The best results were seen with a mix of Vermicompost, 75% NPK, Azospirillum, PSB, and K-Solubilizers, which led to taller plants, more branches, quicker flowering, more fruits, and higher yield compared to using no fertilizers. This combination also allowed for a reduction in chemical fertilizers by 20-25%, saving money and being better for the soil and environment.