Yes, it’s here: Peecycling.  Urine as Fertilizer.  Why, you ask?

“Aside from the fact that we use large amounts of potable water to remove a relatively small amount of urine from our houses each day, that yellow liquid also happens to be full of nutrients that could be used as fertilizer for crops.”

“A group of researchers at the University of Michigan Engineering department are investigating the use of disinfected human urine as fertilizer on a large scale, where it could supply important plant growth nutrients and help to close “the nutrient cycle.”

Read more on Treehugger. Go directly to the U of M research here.
Ready to try it yourself? Read here.