The process in this case shorten thanks to electricity from weeks or months to hours or days and is much more intensive and better observable.
Ni kitu Sawa, lakini si kufanana kama cropmarks, kuona archaeologists. mchakato katika kesi hii shukrani kwa kufupisha umeme kutoka wiki au miezi kwa masaa au siku na ni kiasi kubwa zaidi na bora imethibitishwa.