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Use of human urine as fertilizer
#1
On average, 1 liter of pure human urine contains about 7 gm nitrogen, 1 gm Phosphorous, 2 gm potassium, 1 gm sulphur, 80 mg magnesium and 200 mg calcium. As a result, it can be a cheap source of organic nutrients for plants. Urine from animals (cattle, rabbit etc) can also be used.
 
How to Collect Urine: Ecological sanitation (Eco-san) toilets can be used to collect human urine since they have separate hole for urine diversion and feaces. The urine is channeled to the collection vessels through a polythene pipe. Jerry can or plastic tanks with 15-25 liters capacity can be used as collection vessels for household. If eco-san toilets are not available, you can improvise a way to collect urine.
On large scale, urine can be collected from public places such as hotels, bus
parks etc.
Storage: The urine is stored for at least 1 month in airtight cans to kill enteric microorganisms prior to using in plants. Air must not be allowed to get into the storage container because it will react with the urine and lead to nitrogen loss in the form of ammonia. Stir the urine from time to time to prevent phosphorus precipitation. Storing for more than 100 days ensures that all enteric microbes are killed.
How to Use: It can be diluted and used to fertilize crops or in an undiluted form, it can be used as a soil drench for fruit trees. To reduce nitrogen loss after applying urine fertilizer, work it into the soil and apply when the temperature is low (morning or evening).
 
The amount to apply will depend on soil fertility, other source of nutrients used and requirement of the plant. You’ll get better results when urine fertilizer is applied in the early growth stage of the crop. This is because nitrogen is essential for leaves growth.
 
To fertilize vegetables with urine fertilizer, dilute it with water in a urine:water ratio of 1:6. Use this to fertilize the soil around the roots. Application interval is every 15 days or thereabout.
As a foliar fertilizer (i.e. fertilizer spread on the leaves), the dilution rate should be 1:10. This is mainly used for young plants. Spray both sides of the leaves. Application interval is every 15 days or thereabout. Note that as foliar fertilizer, the urine must be diluted to avoid burning the leaves.
 
For fruit trees, you can apply to the root zone without diluting. Application interval is 2-3 times per year at 15-20 liters per application.
Urine fertilizer can be applied to all crops, but it is mainly used in vegetables and fruit trees whose edible parts do not touched the soil.
 
Other Uses: It can also be mixed with compost and used a lime substitute (to correct acidic soil) since urine increases soil pH.
Precaution: Never apply urine directly on the parts of the plants harvested and it should be stopped at least 1 month before harvesting to avoid any possible risk of crop contamination with germs. Another thing to prepare for is smell. You may fine it offensive.
Reply
#2
Interesting. But this can only be used during times of extreme poverty.
Reply
#3
(02-29-2016, 02:43 PM)FarmKing Wrote: Interesting. But this can only be used during times of extreme poverty.

What u said apply to human urine. But urines from farm animals can be used at any time.
Reply
#4
Waste should not be wasted. That is sustainability.
Reply


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