That said, Lubbert advises that smaller coils have their uses, particularly in wooded spots, as it’s easier to get among twigs, grass, and weeds with a far more compact head. More substantial coils can theoretically detect objects which are further underground, Nonetheless they’re also much more susceptible to electromagnetic interference https://vuf.minagricultura.gov.co/Lists/Informacin Servicios Web/DispForm.aspx?ID=12231479