Abstract:Land application is an important way for treatment of municipal sewage sludge both in China and in the world. Therefore, the contents of organic matter and nutrients in sewage sludges and their effect on promotion of plant growth have been highlighted when they are recycled in lands. There have been some systematic summaries for land application of sewage sludges in developed countries while those have not been reviewed in China though there are some specific research related to their contents of organic ma...