TY JOUR TI CHEMICAL COMPOSITION OF SOD-STRONGLY-PODZOLIC LIGHT-LOAMY SOIL DURING LONG-TERM AGRICULTURAL USE KW sod-strongly podzolic light loamy soil KW arable layer KW horizon А1 KW chemical composition JO Vestnik of Kazan State Agrarian University AU Fatykhov, I.S. AU Busorgina, N.. AU Borisov, B.B. AU Islamova, C.M. PY 2019 IS 14 PB Kazan state agrarian University