Urgent Evoke

A crash course in changing the world.

Describe the biggest challenge to food security in your own local community or country -- and an innovative solution that is already underway.


In my country, many people are cultivators, I advise them to do a system called closing the loop.

Let me explain "Closing the loop" here: In Ecological Sanitation, when people talk about "closing the loop", they mean closing the loop between sanitation and agriculture (chiefly with respect to returning nutrients and organic matter contained in excreta back to the soil).

Make sure: The idea is to fertiliser the soil, not the plant.The plant roots will get the nitrogen from the urine via the soil.

Urine is a complete fertiliser, if you urinate directly on a
plant, urine may have a detrimental
effect on the leaves and flowers of plants.


My thanks to all who want to know and to use "closing the loop".








Views: 8

Tags: Improvement, come, cultivators, from

Comment by Ronald Kasendwa on March 18, 2010 at 12:17am
Hi Lyamuremye,

Thanks for the post. What do you mean by "closing the loop?"
Comment by Robert Hawkins on March 18, 2010 at 12:48am
What is closing the loop?
Comment by Sayel Cortes on March 21, 2010 at 8:58pm
We should close every loop, at least those regarding non-renewable resources, not only the one regarding organic waste (which seems the easier and most logical). I think that's the first step (certainly an important one), but sooner or later non-renewable resources would get harder to get so reciclying is important as a second step of closing the loop.

+1 point from bring such an important point
Comment by Sayel Cortes on March 21, 2010 at 8:59pm
I just want to add as an example to follow, how ecosystems are always build around organisms "closing loops" (I mean using some not used energy or nutrient (waste for someone else))
Comment by kenneth declercq on March 23, 2010 at 2:24pm
Comment by Michele Baron on March 23, 2010 at 3:05pm
Some links about closing the loop have been explored in several other blogs here on EVOKE--here are a few direct weblinks to one "close the loop" system:

and videos from the original site:
Comment by Michele Baron on March 23, 2010 at 3:06pm
Comment by Iyamuremye Jean de Dieu on March 23, 2010 at 3:10pm
Closing the loop refers to returning nutrients from excreta to the soil
when people talk about "closing the loop", they mean closing the loop between sanitation and agriculture (chiefly with respect to returning nutrients and organic matter contained in excreta back to the soil).
Comment by Alon Elkin on March 23, 2010 at 3:43pm
This is an important distinction. Most farmers nowdays just use chemical fertilizers, that, while more effective, are a limited resource.

Here in Israel, phosphates harvesting have destroyed some beautiful areas in the Judean desert, and nitrate harvesting is slowly draining away our unique natural resource, the Dead Sea.

If only farmers, even in developed countries, remembered to make use of the nutrients found in our waste excrement, we could greatly reduce the world's dependency on chemical fertilizers.
Comment by Simon Brookes on March 23, 2010 at 4:46pm
Thanks for sharing this with us. +10 knowledge share coming your way :-)

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