after this, dukuchaev entered st.etersburg university, eventually receiving an excellent education. who is dokuchaev, first of all, of course, he is a great scientist, the founder of the ancient sciences, this is the only science with purely russian roots, there are no others like him, having graduated from st. petersburg university, dokuchaev remained within the walls of almamater as the custodian of the mineralogical collection, geology and minerals, what occupied him most at that time in the development of new methods for estimating age. the entire black earth strip of russia, the volga region, for a record short period, dakuchaev examined bessarabia, crimea, the caucasus, took a huge number of soil samples, developed the foundations and methods for compiling the first soil maps. only two maps have national significance, the geological and soil map of the russian federation and are not declassified. this subsoil is wealth, understanding from the point of view of economics and geopolitics. and our main wealth, well,