TY JOUR TI CALCULATING DOSES OF MINERAL FERTILIZERS ON CLOVER AND RYEGRASS FOREST-MEADOWS OF THE MIDDLE VOLGA REGION KW meadow clover KW ryegrass multi-hulled KW nitrogen-phosphorus and potassium fertilizers KW green mass KW productivity KW the amount of sugars KW digestible protein. JO Vestnik of Kazan State Agrarian University AU Khismatullin, M.. AU Minnullin, G.. AU Safiollin, F.N. PY 2018 IS 12 PB Kazan state agrarian University