Neem cake is the de-oiled residue that can be used after Neem kernels are crushed for their oil. In this seed kernel are nutrients like NPK ((nitrogen-phosphorus-potassium) as well as nortriterpenoids and isoprenoids. These nutrients are nematicidal in nature so the seed cake ends up with these properties.
Neem cake is used as an organic fertilizer because of the various micro and macro nutrients which it is composed of. It will control, at the same time, soil based pathogens as well as nematodes. It will also inhibit nitrification of the soil plus enhance the efficiency of nitrogen providing fertilizer. Neem cake is used in agriculture, horticulture, floriculture and the turf industry as an organic fertilizer as well as a natural nematicide.
There are several reasons why you should use Neem Cake as a soil amendment: