Dynamics of mineral nitrogen in the gray forest soil under malt barley on the background of mineral fertilizers in the forest steppe of the east PrisayanViktor Grebenshchikov, Nikolay Tyutrin and Vasily VerkhoturovE3S Web Conf., 285 (2021) 06005DOI: https://doi.org/10.1051/e3sconf/202128506005