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Other uses
Ancient uses

The ancient Romans used urine as a bleaching agent for cleaning clothes and there are even isolated reports as a teeth whitener (supposedly originating in what is now Spain).

In Siberia, to communicate with the spirits, the Koryak people drank the urine of another who has consumed fly agaric (an entheogenic mushroom that is occasionally fatally poisonous), or of one who has in turn drunk urine of like source. According to Koryak tradition, sometimes the urine of reindeer that had eaten fly agaric would be ingested -- although there are skeptics who claim that an animal would naturally avoid this mushroom because of its deep red color -- and reindeers are reported to lick the ground where users of fly agaric had urinated. The potency of the mushroom does not decrease significantly until around the seventh drinker, because the muscimol from fly agaric is essentially unaltered after being secreted from the kidneys. Not only does this conserve the mushrooms, but it also eliminates unpleasant side-effects caused by muscarine, as this does not pass through urine and only the initial ingestor must experience the unpleasant effects.[citation needed]

In England, stale urine was used for cleaning and to flavor ale.[citation needed]

Fertilizers
Urine has applications in gardening and agriculture as a fertilizer. Gardeners often recommend a dilution of 10-15 parts water to one of urine for application to pot plants and flower beds during the growing season; pure urine can chemically burn the roots of some species. Urine typically contains more than 50% of the nitrogen and phosphorus and potassium content of whole sewage, and is widely considered as good as or better than commercially-available chemical fertilisers or stabilised sludge from sewage plants. Urine is also used in composting to increase the nitrogen content of the mulch, accelerating the composting process and increasing its final nutrient values.

Urine is also being actively considered as a fertilizer for use in food-crop agriculture in developed countries. Studies into its feasibility and safety usually indicate that it is an acceptable alternative to chemical fertilisers and stabilised sludge. However, the technology to implement its use on a large scale has not been developed, and is considered too expensive. There are also concerns over its safety regarding the potential for transmitting infectious disease and refluxing xenobiotic compounds (associated with toilet-cleaning products and prescribed drugs expelled in urine) in the human food chain. Proponents of adopting urine for this use usually claim the risks to be negligible or acceptable, and point out that sewage causes more environmental problems when it is treated and disposed of compared with when it is used as a resource. Critics generally agree that more research is needed into how the resource is to be collected, processed and handled.

A few people use urine as a crop fertilizer. These include organic farming cooperatives and eco-villages where special urine-diverting toilets with collecting tanks are installed. Many of these also employ concepts such as greywater irrigation and the composting of fecal matter. Many are the subject on ongoing feasibility studies sanctioned by governments and private organisations. These people generally reject safety concerns over its use on food crops provided that it is used with common sense. For example, application to fruit trees is considered safer than to bushes and especially root crops. It is also considered sensible to cease application at a safe interval before harvesting. However, the use of urine for this purpose is even rarer than its use on ornamental gardens.

In developing countries, the application of pure urine to crops is also rare. However, whole, untreated sewage, termed night soil, is often applied to crops and is considered essential. It is worth noting that this practice is not new and has been applied, along with crop rotation schemes, for thousands of years.

In Japan, urine used to be sold to farmers who would process it into fertilizers.

Survival uses
Shipwrecked or people otherwise adrift at sea for long periods often resort to drinking their urine when no rainwater is available, seawater being unsuitable. People stranded in deserts often also drank urine to prevent life-threatening dehydration from setting in. However, this desperate measure achieves little to delay death from thirst as urine dehydrates one in the same manner saltwater does.

During World War I, the Germans experimented with numerous poisonous gases for use during war. After the first German chlorine gas attacks, Allied troops were supplied with masks of cotton pads that had been soaked in urine. It was believed that the ammonia in the pad neutralized the chlorine. These pads were held over the face until the soldiers could escape from the poisonous fumes, although it is now known that chlorine gas reacts with urine to produce toxic fumes (see chlorine and Use of poison gas in World War I).

Urine has also been historically used as an antiseptic. In times of war, when other antiseptics were unavailable, urine, the darker the better, was utilized on open wounds to kill bacteria.[citation needed]

Urban myth states that urine works well against jellyfish stings, although in reality it is at best ineffective and in some cases may actually make the injury worse.[3][4][5]

Cultural uses
Some people incorporate urine into their sexual activity. A person with urolagnia may urinate on his or her partner or enjoy being urinated upon.

The consumption of urine can be seen in the films CKY and Jackass in the form of a frozen confectionery. After scooping ice into a cone he then urinates into it forming a slush drink which he then consumes. However, shortly afterwards he became sick.

History
The yellow color of urine was previously thought to come from gold. Alchemists spent much time trying to extract gold from urine, and this led to some interesting discoveries such as white phosphorus, which was discovered by the German alchemist Hennig Brand in 1669 when he was distilling fermented urine. In 1773 the French chemist Hilaire Rouelle, discovered the organic compound urea by boiling urine dry.