Content of heavy metals in Haplic Chernozem under conditions of agrogenesisAnna Medvedeva, Olga Buryukova, Alexey Kucherenko, Yaroslav Ilchenko, Victor Chaplygin, Vishnu D. Rajput and Ridvan KizilkayaE3S Web Conf., 169 (2020) 01024DOI: https://doi.org/10.1051/e3sconf/202016901024