Correct Answer: (c) Sunhemp
Solution:The green undecomposed material used as manure is called green manure. It is obtained either by growing green manure crops or by collecting green leaves (along with twigs) from plants grown in wastelands, field bunds, and forests. Green manuring typically involves leguminous plants, which are grown and then incorporated into the soil after sufficient growth. Some important green manure crops include sunhemp, dhaincha, pillipesara, clusterbean, and sesbania rostrata.
