Manure is organic matter, primarily animal waste, that is used as fertilizer in agriculture. It enriches soil by providing essential nutrients like nitrogen, phosphorus, and potassium, which are vital for plant growth. Common sources of manure include livestock such as cows, pigs, and chickens. In addition to improving soil fertility, manure helps with soil structure and moisture retention. It can be applied directly to fields or composted to reduce pathogens and odors. Proper management of manure is important to prevent environmental issues, such as water pollution from runoff.