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Martin
Martin, Engineer
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DOES URINE CONTAIN NITROGEN IF SO, IS IT USEABLE ON PLANTS

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DOES URINE CONTAIN NITROGEN? IF SO, IS IT USEABLE ON PLANTS? I'VE HEARD THAT IT DOES AND THAT IT CAN BE USED ON NON-FOOD PRODUCING PLANTS. tHANK YOU
Yes it is. The money value of urine going into sewers around the world is astounding. Not to mention the problem it cause "down the drain" as it become a problem in bodies of water.



The reason why it's not recommended for food producing plant is double. Some molecule with human markers can make it into the plant capillary structure and those can eventually develop into a cancer when human ingest the plant back (one of the never mentioned reason why you should never eat human meat :)). The other reason is that lot of antibiotics and drugs can reach the plant metabolism and then be ingested when you eat the foods.



Urine should always be mixed with compost (always do that outdoor, or ammoniac vapor will smell really bad). Never use it pure, always dilute it by at least 1 for 10. Also, it's best to apply it when a small rain is coming so it mix more uniformly (don't do that if it rain too much or big rain are to come in the day because it will drain away).



The amount you need will depend on the plant you have and the soil. Before doing it systematically, try it on a small section. Lawn grass is good to test this as even if you burn it, it will grow back and you will easily see how it compare with non-exposed area (expect 1.5 week before seeing result).



There is no problem to use urine that was mixed with compost for a while, but if you just use it dilute, be aware that the same thing that happen with chemical fertilizer apply: you can kill the micro-organism ecosystem. To prevent that, just do small spot at a time so that the living organism can navigate between them and be able to repopulate those region quickly.

Edited by Martin on 10/5/2009 at 4:50 PM EST
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About the additional question you included in the feedback, the ph is very close to 7 (neutral). It can be a bit higher (7.4) if you are subject to kidney stone.

For a more particular information of the urine ph, read the following link:
http://www.rnceus.com/ua/uaph.html

Edited by Martin on 10/5/2009 at 7:47 PM EST