Green manure is an undecomposed material used as manure. It is obtained in two ways, namely by growing green manure crops or by collecting green leaves (along with twigs) from plants grown in wastelands, field bunds and forest. Green manuring is growing in the field plants that usually belong to the leguminous family and are incorporated into the soil after sufficient growth. The plants grown for green manure are known as green manure crops. Sunhemp, Dhaincha, cluster beans and Sesbania are the most important green manure crops. Green Leaf Manure Application of green leaves and twigs of trees, shrubs and herbs collected from elsewhere is known as green leaf manure. Forest tree leaves are the main sources of green leaf manure. Other sources of green leaf manure is plants growing in wastelands, field bonds, etc. The important plant species useful for green leaf manure are neem, Glyricidia, Karanji (Pongamia glabra) Calotropis, avise (Sesbania grandiflora), subabul, and other shrubs.