How much effect does the moisture of the soil have to do with detection depth?

depth detection moisture soil
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How much effect does the moisture of the soil have to do with detection depth?

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For a lot of metallic targets, lying in moist soil will cause corrosion, whereby some of the metal will leach out into the soil causing the target to appear much larger than it really is. When the soil dries out, the corrosion may not affect the detector, which makes the target look like its normal size. Gold doesn’t corrode in the ground, and silver doesn’t corrode nearly as much as copper, brass and bronze. Iron and steel, of course, rust in moist ground and can cause some really horrendous false signals.

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