Applying compost and biochar made from cow, goat, and chicken manure can help increase red chili yields and improve soil fertility. By combining different types of compost and biochar, researchers found significant improvements in soil properties like sand, clay, pH, and nutrient levels. Using chicken, goat, and cow compost led to higher chili yields, while chicken, goat, and cow biochar also increased chili production. The interaction between compost and biochar positively impacted soil health and chili growth, showing a strong connection between chili weight and soil characteristics like pH, nutrients, and pore space.