Answer:
Major sources of manures are:
Cattle shed wastes-dung, urine and slurry from biogas plants.
Human habitation wastes-night soil, human urine, town refuse, sewage, sludge and sullage.
Poultry Jitter, droppings of sheep and goat.
Slaughterhouse wastes-bone meal, meat meal, blood meal, horn and hoof meal, Fish wastes.
