It is shown that specific electric resistance (SER) of elements in the East Transbaikalia forest biogeocoenoses has following values: a grassy cover, mosses, an ant hill, a laying, the basis of a trunk of trees – about 0 Om·m a trunk of trees (a pine, a birch, a cedar, a fur-tree) – 200–450 Om·m soil horizons – 0–180 Om·m sandy and sandy alluvial horizons – 300–450 Om·m. Statisticians of indicators SER (a median, disorder and quartile) can be diagnostic characteristics of soil horizons and parent rocks. SER of a pine trunk, a cedar, a fur-tree depends on a slope exposition: on the North side R always more low, than on the southern.