TY JOUR TI IN THE GRAY FOREST SOIL OF CHUVASHIYA KW soil cultivation technology KW plowing KW loosening KW chilling KW zero KW moisture reserves KW soil water absorption KW transpiration and subsoil runoff. JO Vestnik of Kazan State Agrarian University AU Il'ina, T.A. AU Il'in, A.N. AU Vasil'ev, O.A. PY 2018 IS 12 PB Kazan state agrarian University