urine in garden

I have the privilege of belonging to a wonderful city garden email group based in Mumbai: look at this and this link to founders of the group and be impressed!

I take the liberty of copying one of their blog headers to add colour here, link is above or if you click the picture:

Coming back to that discussion after several years of other preoccupations has been a big factor in driving me to be more constructive in my food garden and to begin this blog.

Here are piddling thoughts I wrote to that group just now:

When we were discussing feeding lemons before, someone asked whether urine, rich in nitrogen, would not be mainly good for green leaf growth.
Two days ago I was delivered some tomatoes by a neighbour with advice that they were so successful because piddled around. "I encourage my visitors, but they seem shy."
Then thinking about it this morning (while diluting a small contribution of mine into a watering can) I suddenly thought: OH YES, there are lots of minerals in piddle, depends on the individual on the day.
So after administering this dilute dose to seedlings I came in and did a web search for 'analysis mineral human urine' and got lots of results, among which this most interesting and garden-practical:
http://www.bigblogofgardening.com/human-urine-as-fertilizer-in-your-home-garden/
very interesting blog too!

There is some interesting information on mineral assays of urine here, with a sample analysis here

best wishes
Dennis 

p.s. my one apprehension about this, for people in tropical environments, is regarding schistosomiasis. The biggest risk is to people working in wet rice fields, etc. But it seems a good precaution to know whose piddle is being added to the garden in the wet season in particular.
See this regarding situation in India
http://www.hindawi.com/journals/jpr/2011/250868/
and this quote below is from
http://www.astmh.org/AM/Template.cfm?Section=Tropical_Medicine_QandA&Template=/CM/ContentDisplay.cfm&ContentID=1309
Schistosomiasis (shis-toh-soh-my'uh-sis)
This disease is caused by several species of flatworms of the genus Schistosoma. About 200 million people are infected, with three times that many at risk. An estimated 200,000 people (0.1% of those infected) die every year, but many more (about 10% of infected individuals) suffer chronic damage to vital organs including the liver and kidney.
Interestingly, while this parasite's life cycle also involves an invertebrate vector, it is not transmitted through the bite of an insect, but rather develops within freshwater snails. After exiting from the snail vector, schistosome larvae swim along until they contact a human host bathing or working in the water.
They penetrate the skin, and subsequently migrate through the blood vessels until finally establishing residence in veins of the intestines or urinary bladder, depending on the parasite species. The adult male and female worms pair, mate and produce large numbers of eggs, some of which are excreted in either feces or urine and wind up in the water supply where they hatch and complete the cycle by infecting new snail hosts.
The adult worms do not cause the most common manifestations of the disease. Those eggs that are not excreted but instead become lodged in the body's tissues cause disease.
In a process known as granuloma formation, masses of cells form around the eggs in an effort to destroy them; in so doing, however, these cells initiate a process of tissue scarring (fibrosis). In those forms of the disease involving the liver and intestines, this impedes blood circulation and can cause death due to rupture of distended blood vessels. In the form involving the bladder, the extensive scarring can result in obstruction of urinary outflow.