The common term for animal waste used in agriculture is "manure." Manure is typically derived from livestock such as cows, pigs, and chickens and serves as an organic fertilizer. It enriches soil with essential nutrients like nitrogen, phosphorus, and potassium, promoting plant growth. Additionally, manure aids in improving soil structure and water retention, fostering a healthier ecosystem. While manure can effectively enhance agricultural productivity, it must be managed properly to prevent environmental issues such as nutrient runoff into water bodies, which can lead to pollution and harmful algal blooms.