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Soil - Electrical Resistivity

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The resistivity values of soil may be useful when designing earth-electrode systems.

Soil - Electrical Resistivity
SoilMean Value of Resistivity
(ohm m, Ω m)
Clay, compacted 100 - 200
Clay, soft 50
Clayely sand 50 - 500
Humus, leaf mold 10 - 150
Granite 1500 - 10000
Granite, modified 100 - 600
Jurassic marl 30 - 40
Limestone, fissured 500 - 1000
Marl 100 - 200
Mica schist 800
Peat, turf 5 - 100
Sandstone 1500 - 10000
Sandstone, modified 100 - 600
Shist, shale 50 - 300
Siliceous sand 200 - 300
Soil, chalky 100 - 300
Soil, swampy 1 - 30
Stony sub-soil, grass-covered 300 - 500
Stony ground 1500 - 3000
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