Chesnokova Svetlana M. RussiaVladimir State University, 87, Gorkiy Str., Vladimir, 60000, RussiaChesnokova.chemist@mail.ru Author's articles Assessment of Water Pollution Level, Processes of a Nitrification and Self-Treating of Ammonium Ions in a Small Water Reservoir of Ilevna Study of the Effect of Antibiotics of Various Groups on the Nitrification Activity of Sod-podzolic Soil by the Method of Laboratory Modelling