Look at the size of the corn grown on urine vs the corn grown without urine. Amazing

http://www.ecosanres.org/PDF%20files...ESR6lowres.pdf

Besides Nitrogen, Potassium, and Phosphorus, there are lots of other chemicals in Urine.

arsenic 0.137 mg/L
Arsenobetaine 0.069 mg/L
Dimethylarsinic acid 0.036 mg/L
selenium 0.059 mg/L
zinc 0.62 mg/L
sulfur
formaldehyde
Urea
plant growth hormones such as auxins
other minerals...
organic matter