Manure is a content that increases the soil fertility. Two types of manure are—green manure and organic manure.

Green manure is a type of cover crop grown primarily with mixing of green crop with soil. It adds nitrogen and organic matter to the soil for the improvement of crop yield. Green manuring also improves soil aeration and drainage conditions. For green manuring, both leguminous and non-leguminous crops are used.

Organic manure improves soil fertility by adding organic content. Organic manures are of several kinds. Farmyard manures are readymade manures. Solid and liquid excreta as dung and urine of all farm animals are termed as farmyard manures. Compost manure can be prepared from a variety of refuge materials such as straw, sugarcane, forest Utter, kitchen wastes. The ideal method of storage of the organic manure is under anaerobic conditions at a temperature of 26 °C. The manure heap gradually looses nitrogen and the best hope of improvement lies in storing the manure in watertight pits, so made that they can be completely closed.