Austin sells Dillidirt same thing sewerage sludge dried out and out in bags for yuppies to put in the garden.
D. Franklin; A lot of replies on this one!
Leather. The chinese use pee in their tanning process. New Balance shoes are assembled here, but they were using chinese components, including leather. People started complaining about the pee smell of their shoes! I had this problem with some chinese manufactured boots. No more chinese for me!
I do not think its a good fertilizer. They originally sold millorganite to golf courses I would not use Dillidirt or milorganite in my garden. No way to know that stuff was dumped in the sewage system on the front end.
You can use Urea as fertilizer but that restricted to farming applications.
Summary
Urea is a low cost nitrogen fertilizer form. This is because of its high nitrogen composition and consequent low transport and storage costs. Urea may be the fertilizer of choice when only nitrogen is needed in a soil fertility program.
Urea converts to ammonium bicarbonate within about 48 hours after field application. Nitrogen in this form will tend to volatilize to the air as ammonia gas. This lost fertilizer investment risk can be minimized or eliminated by assuring that the urea gets into the soil and does not merely remain on the surface of the soil or crop foliage. This can be accomplished by irrigating in the urea; by plowdown soon after surface broadcast application; or by banding or injecting the urea directly into the soil.
More at link.