It's called manure.
manure
manure.
It is a pit used on farms to gather animal waste and unusable hay and slowly (and smellily) convert it into a noxious fertiliser (it's also toxic), which is then spread on fields.
sludge.
dried sludge is used as fertilizers as normal sludge is wet and contains bacteria which can harm the crops.
nitrogen
fertiliser
peat
animal grazing
Nitrogen is a fertiliser that encourages green growth, but, as it also encourages soft growth it is better used in a balanced fertiliser.
In some areas dried animal waste is used for cooking and heating.
Yes, though often in the form of Ammonia.
marl