The dual activity of nature neem cake as fertilizer and pest repellent, has made it a favored input. It is widely used to fertilize cash crops. When it is ploughed into the soil it also protects plant roots from nematodes , white ants and other soil insects.the dual activity of nature neem cake as fertilizer and pest repellent, has made it a favored input. It is widely used to fertilize cash crops. When it is ploughed into the soil it also protects plant roots from nematodes , white ants and other soil insects.