Ilyasov Valeriy Sergeevich RussiaPerelyubLLC ≪Perelyubskaya Mining Company≫, 413750, Saratov region, Perelyubsky district, village PerelubZevaZevasr_zeva@list.ru Author's articles Environmental Management – Combining Agricultural Technology and Geology Geochemical Characteristics of Oil Shales in the Volzhskii Basin and Productive Forecast of Rhenium Commercial Concentrations