Karanja Oil Cake is the residue obtained from Karanja seed kernels which have been crushed to extract the oil. Rich in N-P-K, it is an excellent organic fertilizer. Karanja cake has been known to enrich the soil and protect the plant. Earthworm populations have been known to increase where karanja cake has been applied. It has a very mild scent compared to neem cake and aerates and improves soil structure.