TY JOUR TI CHARACTERISTICS OF CHEMICAL COMPOSITION OF UPPER HORIZONS OF SOILS OF ROADSIDE PHYTOCENOSIS KW soil KW roadside phytocenoses KW salt composition KW biogenic elements KW nitrite nitrogen KW nitrates KW mobile phosphorus compounds KW exchange ammonium JO Vestnik of Astrakhan State Technical University AU Alimova, G.. AU Tokareva, A.. AU Popova, E.. PY 2018 IS 2018 PB Astrakhan State Technical University