The study tested different types of animal manure compost and biochar to see how they affect soil quality and chili plant growth. They used six types of fertilizer and three doses in a greenhouse experiment. Results showed that compost and biochar from goat and chicken manure were better for soil properties and chili production compared to cow dung. Goat compost had the highest impact on chili plant growth, while chicken biochar had the best effects on soil nutrients. The type of animal manure used affects the quality of compost and biochar, which in turn influences soil health and crop yields.