Using organic as fertilizer is called organic fertilizer. Including Human excrement and urine, barnyard manure, Compost, green manure, cake fertilizer and Biogas fertilizer etc. It has the many kinds of characteristics, wide sources and long fertilizer efficiency. The nutrient elements are mostly organic state contained in organic fertilizer, which is difficult for crops to use directly. It has to through the action of microorganisms, a variety of nutrient elements are slowly released to supply crops continuously. Applying organic fertilizer can improve soil structure, coordinate water, fertilizer, gas and heat in soil, and improve soil fertility and land productivity.
