Characteristics of farmyard manure Manure is an excellent fertilizer containing nitrogen, phosphorus potassium and other nutrients It also adds organic matter to the soil which may improve soil structure, aeration, soil moisture-holding capacity, and water infiltrationCharacteristics of farmyard manure ▪ Manure is an excellent fertilizer containing nitrogen, phosphorus, potassium and other nutrients. ▪ It also adds organic matter to the soil which may improve soil structure, aeration, soil moisture-holding capacity, and water infiltration