how come we can use HORSE, COW or FISH crap--but not our own for fertilizer or can we?

Answer 1

Many cultures do collect and use human waste for fertilizer. In China, they call it "night soil".
Raw human waste is not so good for fertilizer, because people carry various pathogens and other fun stuff that can cause infection, food poisoning and other swell stuff. E Coli is from human waste, and makes the news when food is contaminated with it.
When it's processed at a waste treatment plant, those problems are eliminated, and it is spread on farmland for fertilizer. One type, made in Milwaukee from sewage is called "millorganite", and is quite popular as lawn fertilizer.
The fact that we eat meat does affect the quality of the "manure" we produce, though...adding more protein to it, more fats and other things that don't break down as easily.

Following up on a comment by another poster...one problem that is being found is that many drugs pass through us, and are not affected by the waste treatment process. There is measurable amounts of prozac, for example, found in the discharge from those plants. So the fish are less depressed now.

Answer 2

THe only place that the e-coli strain that affects iss from grain feed bovines at a staughter house that have been feed nothing but drain for 2 weeks, This manure is spread in a mature garden, Manure in contact with a lettuce leaf, harvested and eaten with out washing can cause ecoili NOTE 3 conditions must be met to pass ecoli #1 a very old rule of thumb, never apply fresh manure after the seeds have sprouted #2 Do not use manure from a slaughter house #3 Wash your veggies before eating Just a little tiny friging chunk of common sense Horse Manure Yes there is a disease that can be passed from horses to humans To do it, you must eat some fresh horses-it right after the horse drops it. When the manure cools off the bacteria dies Simple rule of thumb; Don't eat hot horse sh-t A little tiny bit of common sense in the garden PLEASE

Answer 3

Horses, cows, and fish carry very few diseases that are transmissable to humans, so their manure is not particularly harmful to us. Humans, on the other hand, can pretty much catch anything that any other human can, so the hazards of using human manure would be very large as a result. That being said, there are a few countries that use human manure, or that have done so historically.

Answer 4

You are wrong. City sewer plants often spread the waste on fields for fertilizer.

Answer 5

Don't know where on earth you live, but what do you think happens to most sewage nowadays? At least in the UK it's generally treated and the resultant slurry drilled into the ground

Answer 6

Well horses and cows etc don't really eat food with alot of chemicals and preservatives in them, so their poop probably has more nutrients in it than human waste.

Answer 7

because those animals are not meat-eaters. humans, dogs, cats and other carnivores need to have their manure treated before it can safely be used as fertilizer.

Answer 8

some do, that's one of the reasons we've been having problems with the produce being contaminated with E. Coli

Answer 9

NEEDLESS TO DAY THEY DO, SLUDGE IS SPREAD ON LAND FOR FERTILATION,

Answer 10

i think you can but chicken and the other ones are the best