But they are at such a depth underground, that without the passage of electricity from the lightning discharges through the vegetation structure and their roots show other years absolutely nothing. The lightnings electricity - cropmarks intensifier, highlighter, and developer of such cropmarks (deep structures), unidentifiable and unobtainable by any other method. Already Crawford himself observed, that in some years, on the fields appear vegetation symptoms that were not observable many years before nor afterwards, and within their means very correctly concluded, that the most likely it mostly depends on the influence of weather.
Bahagyang maaaring makapinsala ang electrical enerhiya pipiliin puro sa mga lugar ng mas mababa paglaban, ng mga halaman at maging sanhi ng pagwawalang-kilos ng paglago, o kahit na puksain ang mga ito. O lamang Pansamantalang baguhin ang mga katangian ng lupa sa pamamagitan ng elektrolisis, (baguhin sa PH, ang konsentrasyon ng mga sangkap matutunaw) at halaman Pansamantalang kumilos katulad sa transplanting.