TY JOUR TI Phytotesting of sod-podzolic soil and leached chernozem when using new forms of nitrogen fertilizers KW phytotesting KW sod-podzolic soil KW leached chernozem KW urea KW urea-formaldehyde fertilizers KW UF KW spring wheat KW white mustard KW ammonification KW nitrification JO INTERNATIONAL AGRICULTURAL JOURNAL AU Zavalin, A.A. AU Sviridova, L.A. AU Lapushkin, V.M. AU Leshchinskaya, K.S. PY 2025 IS 0 PB Electronic science