Urine is actually a decent high N fert. It MUST be diluted with water and the only negative aspect of using it is that there is a high level of salt in urine. I personally have used it on my plants when I miscalculated my budget and had to go a few weeks without Nutes. After a week I started noticing a N deficiancy and decided to try this for myself. I took a multi vitamin and drank lots of water that day. The plants picked up soon after being fed with the diluted urine.
Also, if you look many commercial fertilizers have something called uria in them as a Nitrogen source. It is derived from urine.
I recently read an article about a group of Horticulter/ Botony professors feeding a large compost with thier own urine to save money and have been doing experiments with it with great succsess.
And for anyone out there that thinks it's gross, I ask you how is it any more gross than using cow, bird, or bat fecal matter(SHIT)?
There is a posting on this site about it somewhere but human urine has high nitrogen and many trace elements and secondary nutrients. Dilute it with water, something like at least a 10:1 ratio meaning 10 parts water 1 part urine. As I said though, be wary of salt build up if using this for an extended period of time.