Green manuring is a farming practice where a leguminous plant which has derived enough benefits from its association with appropriate species of Rhizobium is ploughed into the soil and then non-legume is grown and allowed to take benefits of already fixed nitrogen. Some common green manuring crops are Sesbania aculeate, Cyamopsis, Tetragonoloba, Crotalaria Juncea, Vigira sinensis, Lens esculenta, Macrotyloma uiflorum, etc.