Edited by hal_2011, 3 April 2011 - 01:23 PM.
Effect of Human Waste on Soil and it's Inhabitants ?
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Posted 30 April 2011 - 10:32 AM
The two prongs are of different metals. They cause a 'Galvanic' action between them in the presence of moisture in the soil.
The flow of electrons between them causes ionisation which gives the 'Conductivity' of the soil as a pH reading.
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Posted 30 April 2011 - 12:09 PM
Edited by rktpro, 30 April 2011 - 12:09 PM.
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