I have heard that if you dilute your pee to about 10% urine and 90% water, it makes a great fertilizer. That may be true, but I would have a hard time eating vegetables I knew grew in pee, even if it was my own! Likewise, I could not use feces of any sort. I don't think I want to know if store-bought fertilizers contain such things.
Blimey Claws, don't ever go to a farm, you'd end up starving yourself to death
All soil is made up from organic matter, be it poo, dead bodies, rotting fish, dead plants.
Otherwise it would just be rock dust made up of minerals.
Yes you could grow plants in just rock dust, but they wouldn't do brilliant, it's the organic matter that holds the moisture and nutrients that the rain would otherwise wash out.
When I was about 7 I had to live with an Aunt and Uncle, my Uncle used to kid us that he fed his Tomatoes on Sheep's wee
Met him again at a Funeral last year and asked him what it actually was, he said he'd found an old Septic tank and was using that to feed them
They were some good Tomatoes