If you mean manure, you must own an equestrian center first. Then, when you get at least 25 lbs of dung, you can make one lb of manure, giving you an extra bountiful crop. (Dung costs 6e. each and you cannot use the dung you already own from your horses, you must buy it from the equestrian center store.)
Historically dung was the farms source of fertilizer. Typically it is high in a nitrogen which is essential for grass growth. Some farms today still use manure for fertilization. They will clean the corrals and spread it over the field with a manure spreader. Or they will use a harrow (picture a heavy duty chain link fence with spikes coming out of the bottom) to spread manure around a pasture.
Chicken manure is extremely high in nitrogen. Nitrogen is an essential chemical in feeding cattle. Some feed supplements use chicken manure mixed in to increase the nitrogen and thus nutritional value of the feed. This always reminds me of Gulliver's Travels. The crazy guy that was studying how to eat his own manure. Well we now feed chicken manure to cows then eat the cows, it's pretty close. Thankfully this practice isn't wide spread and is waning in popularity.
the cow dung can be used for the space ship
Biomass is plants, animal dung, and any other herbivore dung used as fuel for a fire.
thay used yak dung for their fire
emigrants on the Oregon Trail used buffalo dung
They are used for several reasons like fertilizer, fire fuel, etc.
Fertiliser or fuel mainly.
the dung
buffalo dung
Fertilizer, mostly. Some people in other countries use cow or bison dung as fuel for their fires.
buffalo dung
Bio gas is produced by the dung it is mixed to some bacteria and used for the fuel.
Ancient Egyptians used crocodile dung as a contraceptive.